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Cycling Calculators

Wheel Circumference Calculator

Wheel circumference from tyre size (e.g. 700×25c or 26×2.0) for bike computers and cadence maths.

Enter values

622 = 700c / 29″, 584 = 650b / 27.5″, 559 = 26″

Results update as you type.

Result

Circumference

2,111 mm

Diameter
672 mm
Circumference (m)
2.111
Revolutions per km
473.7

About the Wheel Circumference Calculator

Wheel circumference from tyre size (e.g. 700×25c or 26×2.0) for bike computers and cadence maths.

Also known as: tire circumference, wheel size calculator, bike computer wheel size, rollout.

How to use this calculator

  1. Enter rim diameter (mm), tyre width (mm).
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

C = π × (rim diameter + 2 × tyre width)

Worked example

Using the values pre-filled in the calculator above:

  • Rim diameter (mm) = 622
  • Tyre width (mm) = 25

the calculator returns:

  • Circumference: 2,111 mm
  • Diameter: 672 mm
  • Circumference (m): 2.111
  • Revolutions per km: 473.7