Revs per mile to mph. probably why 60 MPH is used as a standard.

Revs per mile to mph If the 473 came from Kelly specs, it should be close, but I've seen them off before. The 63360 is the number if inches in a mile. Divide 63360 by the distance between the two spots on the ground. 4 revs/mile. I updated the gearing and tire size and auto sized tables but speedo is way off (50% of actual speed) and shifting isn't happening under wot in certain conditions. 601264 revs per mile for my car • There are 8 teeth on the VSS reluctor, with one pulse per reluctor tooth, so the VSS signal 🔁 mph to RPM. Turned 4,000 rpms at 70 MPH. 10: 26: The number of times these wheels spin to cover one mile is what we call revolutions per mile. C = π × d . Knots. Tire revolutions per mile: If your speedometer says 60 MPH, you are traveling 60 MPH. ; The conversion from RPM to miles per hour can be done with the If you want to keep the same wheels, you probably need to look at 12R-22. I did verify with my GPS and my speedo was off a bit, my car has a TH350 with a 22 tooth driven gear and a 7 tooth drive gear. 25 6610/105 6005/105 43. The rev's per mile is what GM uses for the speedo, for any of the I4, V6, SS, SS-1LE and the ZL1 cars the revs per mile only vary I think 30 revs, so GM uses the same number for all of them. 5 tire makes at different speeds. 278 meters per second, or about 0. Speedometer ratio adjustment calculator. Thread Tools. From what I recall, 2-3 mph difference only needs 10 or 15 revs per mile change. Thanks for everyone's help! Jim MPH — KM/H or KM/H — MPH Converter; Tech Info. ), but "km/h" is the SI unit symbol. 10:1 and measured my tire height (on blacktop) and came up with an average of about 31 inches. Check RPMs vs MPH. With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and transmission gear ratio. 5 14g 8. I'm trying to find the formula to calculate trans rev/mile and the Pulse per mile, if anyone has them handy it would be greatly Wallace Racing BACK to Calculators Speedo Gear Calculator. 56: 33: 42: 4. The results are the RPM (revolutions per minute) of the tire, the RPS (revolutions per second) of the tire, and the centrifugal force of the surface of the tire, at the tread, in G forces. It had 132,000 miles on it when I sold it, still got the same mileage as when new, instead of how many revs per mile they do in the theoretic world. It expresses the number of statute miles traveled over the period of one hour. Or should I leave the revs per mile alone and adjust the axle ratio to 3. At 65 MPH in fourth gear (assuming a manual tranny) you should be at ~2780 RPMs. 0 12 482 20. probably why 60 MPH is used as a standard. Been trying to figure out what my rev's per mile are so i can enter them into my tuner. These tables are particularly useful for those training on a treadmill, where speed in either miles per hour or kilometres per hour is typically displayed rather than pace. 360" divided by 78. Formula. Enter your original tire size, your new tire size, and then play with the miles per hour to see how much faster you are going at different speeds. The stock tire is approx 25. 6257 inches Convert this to inches per hour: 1 hour = 60 minutes--134381. How do you calculate revs on a Double check your tire revs per mile. There are many abbreviations for the unit kilometers per hour (kph, kmph, k. 2013 5. 55 gears, I calculated (actually the online calculators did it for me) that I need to use a 19 tooth driven gear. I tried some online tire calculators but due to every manufacturer being different i Common abbreviations: mph, mi/h. 5280' x 12 = 63360" 4) Divide mile in inches by the circumference of the tire to get your tire revs per mile. To effectively perform the conversion of miles per hour to revolutions per minute and calculate RPM from MPH, use this step-by-step formula: Convert MPH to inches per minute: Inches per Minute = MPH × 63,360 ÷ 60; Calculate the circumference: Circumference = Diameter × π; Divide the Inches per Minute by the Circumference: So a 42 revs per mile change means that when the driver’s speedometer reads 60 mph, his true speed is 63. 3 mph; Speed vs. revolutions per minute [rpm] rpm. 6 meters) 70. 5%, which at 60 mph is only about +/- 2 mph not enough to worry about, just make note of that variation. 1 75 114 tl 10000551 11r24. Ever wonder how far off your speedometer is with your new bigger tires? I'm using a simple ratio calculation, so this info will only approximate your corrected speed and depends on the accuracy of tire size diameters (assuming nothing but tire size has changed). So anyway i was wondering if anybody knew how to calculate my revs per mile. 4667 * 63360 = 156,288 inches per minute Circumference = diameter * pi pi = 3. 03 The speedometer will read 3% fast, because it still thinks that tire is only rolling 848 revs per mile. Below is a chart to assist in vehicle drive-train calculations. 875/848=1. For instance, if you have a specific tire size like 11R22. 805), I knew my rear axle ratio was 4. It helps individuals understand how fast they need to run or cycle to achieve target times over a particular distance. 2012 KB Boss: MGW Shifter & Knob, FRPP LCAs, Relocation Brackets, Adj Panhard Bar,P Springs, Enkei & Nittos, MM Plates, Girodics rotors, Pagid pads, DSS Driveshaft, Trans scoop, Brake cooling 3. Gostaríamos de exibir a descriçãoaqui, mas o site que você está não nos permite. The formula to calculate revolutions per mile involves the wheel or tire's diameter and uses the relationship between the circumference of the wheel and the distance traveled in Whether you’re looking to calculate revolutions per mile (revs/mile), tire circumference, tire height or actual MPH when comparing two tires, we have you covered! Revolutions per mile Revolutions per kilometer When actually driving (MPH) The speedometer will read (MPH) agcoauto. 25 6175/105 5840/105 41. If you counted these rotations for an entire mile, you’d have the revolutions per mile for that tire. For instance, if you travel one mile and know the exact diameter or circumference of your tires, you can determine how many times they rotate. The Rev Per Mile Calculator is a helpful tool designed to calculate the number of tire revolutions per mile, based on the tire size or other relevant parameters. p. My speedo is still reading about 1 mph slow the truck says 65, but all my gps devices say 66mph. I have stock size 245 45 17, but i'm positive my speedo is bad and i'm hoping to fix it with my sct sf3. AGCO Automotive Tire Speed Calculator Vehicle Speed (mph) Tire Revolutions per Mile (RPM) 45: 636: 50: 570: 55: 519: 60: 477: 65: 441: This table shows how many revolutions per mile the 295/75r22. To convert from revolutions per minute (RPM) to miles per hour (mph), you need to know the diameter d of the circle the point is traveling around. Many tires have been redesigned with less tread depth for less rolling resistance, but sometimes they forget to update the spec manual. Revolutions per mile Revolutions per kilometer When actually driving (MPH) The speedometer will read (MPH) agcoauto. 1. viprk24. One of the sheets give the proper calculations for rotations per mile. Your 598 tire requires 1720/1850 Find Miles Per Hour (MPH) Your engine RPM (Revolutions Per Minute): Your vehicle's Tire Diameter. At the bottom of the speedometer face, look for the numbers 940, 960, 1000, or 1020. 5280: The number of feet in a mile, used to convert miles per hour to The number of revolutions per mile is obtained by dividing the tire’s circumference into the total distance of one mile (5,280 feet or 63,360 inches). These numbers correspond to the number of revolutions the speedometer cable must make to register one mile on the speedometer. 010343. Formulas. RPM: RPM (Revolutions Per Minute) and speed are directly related, but the relationship depends on the wheel size (diameter) and gear ratio Each new value recalculates the information. 7 inches with a circumference of 80. DIAMETER, ROLLOUT (CIRCUMFERENCE) AND REVOLUTIONS PER MILE CHART. Calculating tire revolutions per mile (revs) can help in understanding this. 23 axle the calculated transmission revs per mile is 2,542 revs per mile. Revolutions Per Mile. My tire chart (Firestone FS 560+) shows 11R-22. With the stock 3. I have based this chart on the information members have provided me in this thread as well as others. Axle Ratio Tire Height Driven Gear Teeth; 4. Generally Pulse per mile is calculated in vehicles to measure speed with the help of VSS through Speedometer. Many runners find it encouraging to note how small improvements in speed can result in The RPM Tire Size Calculator is a helpful tool for determining the revolutions per minute (RPM) of a vehicle's tires based on the tire diameter, vehicle speed, is traveling at 60 MPH, and has a final drive ratio of 4. 5 81 111 tl A difference in revs between 503 and 486 is about 3. 1 75 118 tl 10000531 295/75r22. I just wanted to get an insight into adjusting my speedometer. 0 12 507 19. 85 if tires are 766 revs per mile. 0 here. 9 would give me 65 mph at the same revs a 4. Dimensional analysis is used to convert miles per hour in a car to revolutions per minute My speedo was off, American Trucks website site said, it is 611 revs per mile. Tire Diameter (inches): The diameter of the tire in inches, which is the size of the tire across the center. Not to be used in place of real testing. MPH: Formula. The formula to convert revolutions per minute [rpm] to miles per hour [mph] is given by:   where:   is the linear velocity expressed in miles per hour [mph]   is the angular velocity expressed in revolution per minute [rpm]   is Enter the required values into the calculator, and it will provide your speed in both miles per hour (MPH) and kilometers per hour (KMH). 65 and overall width of 10. Feet per Second. So for 755 to be 3mph fast, try 765. Depending on the tire manufacturer, revolutions per mile may be either measured in a laboratory or derived from calculations based on 2009 - 2014 Ford F150 - Tire revs per mile questionsneed help! - I upgraded from 18 wheels & tires to 20 wheels and tires. Upgraded tires are Michelin LTX M/S2 275/55R 20 I'm trying to figure out the correct revs per mile for the new tires so I can input that data into my SCT X3 programer to recalibrate my 3) Multiply the distance of a mile in feet by 12 to get a mile in inches. radius [m] radius [m] miles per hour [mph] mph. Something traveling at one kilometer per hour is traveling about 0. 6257 * 60 = 8062897. 42 * 0. Compare with a handheld gps to see the difference. To convert from RPM (Revolutions Per Minute) to MPH (Miles Per Hour), you can follow these steps: Calculate the Circumference: Measure the radius of the rotating object in meters. The ZL1-1LE may use a different calculation since its tire size has a decent amount of difference in the revs per mile. Tire revs might be around 700 per mile (fewer revs with bigger tires, Differential ratio around 3:1, Overdrive ratio around 0. This means your speedometer will be off by 2%, which isn't much, but highway speeds, thats around 1. Engine Alternatives. 6 inches convert the speed of miles per hour to inches per minute there are 63360 inches in one mile and 60 minutes in an hour 148 miles per hour = 148 ÷ 60 = 2. 5 14g 9. 14159. 621 miles per hour. Why Tire RPM Matters? Usually, training schedules show running speed as minutes per mile, or mins per km. Top. 10, the RPM would be calculated as: \[ \text{RPM} = \frac{60 \times 4. Special thanks to Rameen Aryanpur of Tufts University for his contributions to this calculator. i know it will drop if you go down in revs per mile but just in this thread in this sub-forum in the entire site. Step on a treadmill however, Pace and time conversion chart: mph kph minutes/mile minutes/km Interval session pace conversion sheet: 5k, 10k, half marathon, marathon. Fill one of the following fields, values will be converted and updated automatically. 7 12 523 18. 14159,; d is the diameter of the circle. Convert any value from / to revolution per minute [rpm] to miles per hour [mph], angular velocity to linear velocity. Revolutions per mile indicates the number of times a tire revolves while it covers the distance of one mile. The basic formula for calculating revs involves dividing the distance traveled by the circumference of the tire. Once you have the circumference in miles Overview: In this article, learn what is pulse per mile with definition, pulse per mile calculator with formula, What is VSS and more in detail. Convert the miles per hour into feet traveled per hour. One mile, 63. Assuming that the specified drive ratio of 2. How many revs per mile for a 265/75R16 tire? A 265/75R16 tire usually has about 750-800 revolutions per mile. com. Use zero for Converter Slip if manual Transmission. Revs/Mile for my car • The speedometer gear ratio = drive gear / driven gear = 7/19 = 0. 75 = 1575 engine revs per mile, hence 1575 RPM at 60 mph. 5 at 487 revs per mile and if you want to Here are the speedo calibration numbers for a stock 4L60e 2002 Camaro SS. One mph equals exactly 1. Calculate GEAR, RPM, MPH, TIRE DIAMETER: Wallace Racing BACK to Calculators Todays date is 4/29/2025: This calculator is for entertainment value only. ; The conversion from RPM to miles per hour can be done with the following formula: Your 225/70's were 664 revs per mile and your new 245/55's are 705 revs per mile. To be clear read the below definition and formula to better understand and calculate PPM(Pulse Per Mile) for vehicles. Example: 215/45/17 constant is 848 revs per mile. Gear (10 mph x 5280 feet/mile) / 60 min per hr = 880 feet per min, so 10-MPH = 880 feet per minute The diameter of the wheel is X inches. Easily convert minutes per mile to miles per hour, convert min/mile to mph . 86 \text So yes, this means that at 60 mph the motor is turning 7110 rpm. That is a good number to have as a coarse adjustment. Closet thing my tuner has is 610. Calculate the circumference by multiplying the diameter by pi. Calculate RPM for Given Speed(MPH), Rear Gear Ratio, and Trans Gear Ratio. VEHICLE SPEED EQUATION 131. Ford uses a %1. Results 1 to 9 of 9 Thread: VSS Tire Revs per mile confusion. If you would like to see more speedometer calibration speeds at a time, visit our tire size comparison page to compare different metrics of tires and get multiple speedometer calibration readings at once. How is the revs per mile determined for a tire spec, and what is a good derating factor based upon loading, Plugging in the revs per mile I see that the factory is off by 2 mph fast to keep me under the speed limit. You’d notice the tire making complete rotations. In the example above, 52,800 feet per hour times 12 inches equals Hello, I swapped an 05 burb drivetrain into my project truck and it has the 4l80E. To convert from revolutions per minute (RPM) to miles per hour (mph), you need to know the diameter d of bicycle flywheel. 00 6175/110 5675/110 39. 26 = 809. Mickey Thompson Tires & Wheels – UNDISPUTED. 325" ~ 798 tire revolutions per mile. Revolutions Per Mile Chart DIAMETER, ROLLOUT (CIRCUMFERENCE) you are moving at about 5715 inches per minute, or 476 feet per minute, or about 28,500 feet per hour, or just over 5 mph . 4667 miles per minute = 2. This measurement is not just a trivial number; it impacts fuel efficiency, speedometer accuracy, and tire longevity. 61 revs per mile, or 810 when rounded for entry into a tune. 255 The speed at which this saw blade runs is 127. To get the distance in inches per minute: 22. 75:1 700 x 3 x 0. Axle Ratio: Transmission Ratio: Transfer Case Ratio: *Applies to 4-wheel drive vehicles. 215/40/17 constant is 875 revs per mile. 7765467 * 5900 = 134381. quote: Originally posted by Baveux: Yeah ! torque is the only way to go. 545438 inches per hour Convert this to miles per hour: one mile = 63360 -- 8062897. Unless you were driving in fourth gear before, When you are travelling 60 mph on the speedometer, your actual speed is 66 mph. speed = 148 miles per hour diameter = 34. Keep in mind that our calculator does NOT take into account drive train loss, road and weather conditions, or the skill of the driver. concoursd Posts: 1144 Joined: 16 Mar 2007 13:01. With 766 tire revs. Revs * 60 * Wheel Circumference / 63360 / (Gear ratio * Final drive ratio) To explain: The 60 is to convert Revs per minute in to Revs per hour. 75 miles you travel will show up with an extra mile on your odometer. I chose 65 instead of the standard 60 mph because it resulted in a perfect 2,400 rpm. 63360" / 79. You can ignore the actual number of the revs per mile. Kilometers per Hour. per mile and 3. my Primacy MXM4 235-45-18 tires, the number is 790 revs per mile. I headed out to the highway and got my truck up to 65 mph in overdrive and set the cruise. ACTUAL SPEED CALCULATOR . Check out the other Thunderbird/Cougar articles we have: Door Convert any value from / to revolution per minute [rpm] to miles per hour [mph], angular velocity to linear velocity. Post by concoursd » 25 Nov 2009 07:32. 80 MPH is ~3420 RPMs. This, times the 9:1 gear reduction equals 7110 motor revs per mile, times your total number of miles, and that's it! So it is ((tire revs/mile X 9) X total miles driven). At 60 Miles Per Hour or 1 mile per minute RPM Revolution per Mile and Revolutions per minute are the same. You can measure the tires and calculate rotations per mile to double check. Remember that the difference grows exponentially as speed increases. 31? Does anyone know if the automatics use the axle ratio or the revs per mile information for shifting? I understand the tune is commanded to shift at a certain rpm and in adjust options I have added or minused mph to dial in the shift points. not sure what you mean. Show Printable Version; 01-25-2021 #1. This compares favorably with the 2,615 that shows up under the calibration tab. For example, if the reading is 10 miles per hour: 10 times 5,280 = 52,800 feet per hour. The resulting value represents the number of times the tire will rotate to cover a distance of one mile. Common abbreviations: km/h, kmph, km/hr, km/hour. If you calculate against 80 mph, for example, the difference is 4. Calculate GEAR, RPM, MPH, TIRE DIAMETER. Imagine you’re walking alongside your car as it moves slowly. 4667 miles per minute 2. CapriRacer. In one revolution, it travels a distance equal to the circumference of the wheel, which is Pi times the diameter: The Rev Per Mile Calculator is a tool used to determine the number of revolutions a vehicle’s wheel makes per mile based on its tire or wheel diameter. You might also shop different brands/models of the 295s, and you will probably find some variation in revs per mile within that same tire size. Next, calculate the circumference. You are making another 16 revs for every mile you travel. This metric is crucial for understanding vehicle performance characteristics and optimizing various aspects of At its core, this conversion involves a simple formula that links the number of rotations per minute to linear speed, allowing us to understand the velocity in miles per hour or kilometers per hour. , etc. 5, the calculator Going up a long steep mountain pass at 80 mph the car only went 5 mins or less before the engine started even though I was under the blue power arc indicator on dash. 368 for my car • The VSS shaft revolves at a rate = speedometer gear ratio X driveshaft revs per mile = 0. Revs per mile: Revs per mile: Revs per km: Revs per km: Speedo Reading: Just in case anyone is interested, I have created a chart for the RPMs at a given MPH. 6 inches and turns about 787 revs per mile. 10 \times 336}{28} \approx 2952. thanks in advance. 545438 ÷ 63360 = 127. 3 MPH AT 5000 RPM IN 6TH GEAR Well I hope this helps someone. Finally, calculate the rev Rev per Mile refers to the number of times a tire completes a full revolution over the course of a mile. I find this invigorating, as I cannot tell you how many people have not read the footnote on my page, and quite excitedly let me know What is the divided number for a 200 mph speedo? Top. 255 miles per hour. GM LS1 - LS9 / Chrysler Gen III and Viper V10; Use the following formula to calculate "tire revolutions per mile" for the formula above: With 15 Tooth Drive Gear. Definition: The unit miles per hour (symbol: mph) is a measurement of speed in the imperial and United States customary systems. I have set it up to that, however, my speedometer seems to be about 4 to 5 mph too fast. Many other converters available for free. 5's to actually make a difference. 2 at 57 mph does. Measure the tire diameter in inches. 1,001 Revs Per Mile Now that we have that lets figure out how fast we can go! much more simple than the last provided you have all the information. calculator that shows effect of different size tires on wheel and This calculator allows you to convert Revolutions Per Minute (RPM) of your vehicle’s engine to Miles Per Hour (MPH). 5 at 503 revs per mile, 12R22. The calculator considers the size of the tires, the gear and final drive ratios, and how fast the engine is spinning (RPM) to calculate the speed. VSS Tire Revs per mile confusion. 56: 35: 39: 4. This calculator is commonly used in automotive settings to assess vehicle performance, fuel efficiency, and odometer accuracy. The actual of the rear was 798. h, KMph. 75 is correct (3. shift schedule mph is from nvbase you need to set it correctly tire revs * rear end gear ratio / 60 01-25-2021 #5. 15 mph. 0343 offset in the computer for the revs per mile. 368 X 2648. RE: Re: RE: Re: RE: Tire Revs Per Mile. This gives a drive ratio of about 2. I have Nitto Invo 275/40/18 rear tires with a overall diameter of 26. The basic equation used for this conversion looks something like this: [ \text{Speed (mph)} = \frac{\pi \times D \times RPM}{60} ] The mph to minutes per mile conversion is especially important for athletes, such as runners and cyclists, who need to manage their pace to achieve certain goals during training or competition. Centimeters per Second. The second sheet is something I did years ago. Convert feet per hour into inches per hour. View Profile View Forum Posts revs per slr mile [ in ] max speed [ mph ] weight [ lbs ] tiresingle [ lbs / psi ] type dual [ lbs / psi ] 10000541 11r22. . Convert Circumference to Miles (if necessary): Since we want the result in MPH, convert the circumference from meters to miles. The revs per mile doesnt matter if it is a 100 MPH speedo or a 200 MPH speedo. RPM measures the number of rotations or revolutions an object makes in one minute, often used to describe the speed of rotating components like motors, gears, and wheels. Convert speed units. What revs per mile do you guys have your handheld tuners to make it dead on? This works out to about 796 rev/mile. My tuner gave me the ability to change my revs/mile on my SCT X3 device, and according to this website the factory 235/50 R18 tires come out to 740. Bam, you just calculated your physical revs per mile. Speed (mph) = Speed in miles per hour; Example. 609344 kilometers per hour (km/h). The circumference C of a circle is calculated by:. These "typicals" obviously vary by vehicle, but about right for a V-6 or V-8; a four-banger will turn more revs. calculator that shows effect of different size tires on wheel and vehicle speed. I encourage corrections. It basically calculates the amount of HP required to reach a The RPM calculator helps you understand RPM (revolutions per minute) and compute the relationship between the speed of a vehicle and the RPM of its engine. Diameter: Tire revolutions per mile: If your speedometer says 60 MPH, you are traveling MPH. The stock configuration for tire revolutions per mile in my car's EEC is 812. 94. There are 5,280 feet in a mile, so multiply the bike’s miles per hour reading by 5,280. 2 mph. Does the computer shifting The computer has a "constant" built into it for the number of revs the stock tires would turn in a mile. 7-1 x 873 revs per mile at 30mph 60000 That's what I am trying to figure out philthehill, whether the 3. Mile/hour. _____ does anyone know how revs per mile affect rpm or how to figure out how uch it would drop. How to Convert RPM to MPH. Convert Miles per Hour to. At 80 mph, 9480 rpms. Joined Feb 22, 2003 Messages 4,637 Location Somewhere in the US. Thus, take your revs per mile you just calculated and multiply that value by 1. Understanding how to calculate RPM (Revolutions Per Minute) is essential in various engineering applications, including mechanical systems, automotive engineering, and industrial machinery. where: π is approximately 3. The calculation takes into account the wheel diameter, final drive ratio, Speed (MPH): This is the speed of the vehicle in miles per hour. Let’s say we have: RPM = 1000; Wheel Diameter = 60 cm (0. 5 mph. bmcecosse Minor Maniac Posts: 46561 Joined: Wed Feb 16, 2005 11:24 pm Location: ML9 MMOC Member: No. 373 = 974. How to calculate a rev per mile? First, measure the tire diameter. Assuming calibration to brand new tires, when your tires are worn, every 48. opki angb nbduv bsx zfzr utcs mkjviz htp vpji egatii anlrj zbjqrm fjfq bwsyusp euog