Tire Revolutions per Mile Calculator
Calculate tire revolutions per mile from any tire size. See how many times a wheel turns in one mile and at 60 mph.
Estimate rotations over one mile.
Tire Revolutions per Mile Calculator: Tire Size Inputs
Compare two tire sizes here. Use the formulas and reference tables below for this tool's specific calculation.
How Tire Revolutions per Mile Calculator Works?
The Tire Revolutions per Mile Calculator works by dividing the length of one mile, 1,609,344 mm (63,360 in), by the tire's circumference. The tool takes 3 steps.
Enter the size
Type a metric size, for example 265/70 R17.
Find the circumference
The calculator returns a circumference of 2,522 mm (99.3 in).
Divide one mile
The calculator divides 63,360 in by 99.3 in and returns 638 revolutions per mile.
Tire Revolutions per Mile Calculator Formula
The Tire Revolutions per Mile Calculator formula is RPM = 63,360 ÷ (π × OD_in), where OD_in is the overall diameter in inches.
RPM = 63,360 ÷ (π × OD_in)RPM = 1,609,344 ÷ (π × OD_mm)RPM ≈ 20,168 ÷ OD_in- RPM
- Revolutions per mile (not revolutions per minute)
- 63,360
- Inches in 1 mile
- 20,168
- 63,360 ÷ π
Worked example
A 225/45 R17 tire is 24.97 in tall. The tire turns 20,168 ÷ 24.97 = 808 times per mile, or 48,480 times per hour at 60 mph (96.6 km/h).
Tire Revolutions per Mile Calculator Conversion Table
The Tire Revolutions per Mile Calculator conversion table lists the nominal revolutions per mile of 10 common sizes and the wheel turns per hour at 60 mph.
| Size | Circumference (mm) | Circumference (in) | Revs per mile | Revs per hour |
|---|---|---|---|---|
| 195/65 R15 | 1,993 mm | 78.48 in | 807 | 48,442 rev/h at 60 mph |
| 205/55 R16 | 1,985 mm | 78.16 in | 811 | 48,641 rev/h at 60 mph |
| 215/60 R16 | 2,087 mm | 82.18 in | 771 | 46,262 rev/h at 60 mph |
| 225/45 R17 | 1,993 mm | 78.45 in | 808 | 48,457 rev/h at 60 mph |
| 225/65 R17 | 2,275 mm | 89.58 in | 707 | 42,436 rev/h at 60 mph |
| 235/45 R18 | 2,101 mm | 82.71 in | 766 | 45,964 rev/h at 60 mph |
| 245/40 R18 | 2,052 mm | 80.79 in | 784 | 47,055 rev/h at 60 mph |
| 255/35 R19 | 2,077 mm | 81.77 in | 775 | 46,493 rev/h at 60 mph |
| 265/70 R17 | 2,522 mm | 99.29 in | 638 | 38,286 rev/h at 60 mph |
| 275/55 R20 | 2,546 mm | 100.25 in | 632 | 37,923 rev/h at 60 mph |
What is Tire Revolutions per Mile Calculator?
A Tire Revolutions per Mile Calculator is a tool that estimates how many times a tire turns while the vehicle travels one mile. Revolutions per mile is the industry unit for tire rolling specifications in North America.
A taller tire turns fewer times per mile. A 31.6-inch truck tire turns 638 times per mile, and a 24.9-inch car tire turns 811 times per mile.
The calculated figure is nominal. Tire makers publish a measured revs-per-mile value taken under load, which runs 2% to 4% higher than the nominal value.
What are the uses of Tire Revolutions per Mile Calculator?
There are 4 main uses of the Tire Revolutions per Mile Calculator, including speedometer programming and drivetrain matching.
Speedometer programming
Enter revs per mile into a truck tuner or speedometer calibrator.
Drivetrain matching
Match revs per mile on all four tires of an AWD vehicle.
Wear projections
Count total tire revolutions over a service life.
Trailer and fleet setup
Program hub odometers on trailers with the correct revs per mile.
Related Core Tire Dimensions Tools
View All 134 Subtools →Compare two tire sizes.
Compare several sizes together.
Estimate nominal overall diameter.
Calculate absolute and percentage differences.
Estimate nominal circumference.
Compare estimated rolling distances.