Calculate your ankle-to-calf ratio and calf-to-ankle ratio from ankle and calf circumference, compare both legs, or check compression sock chart ranges.

Divide ankle circumference by calf circumference. The reciprocal calf-to-ankle ratio is also shown.

Measure the narrowest part above the ankle bones.

Measure the widest part of the calf.

Related Calculators

Ankle to Calf Ratio Formula

The following formula is used to calculate the ankle to calf ratio for a given ankle and calf circumference.

R = Cₖ / Cₐ

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Variables:

  • R is the ankle to calf ratio
  • Ca is the calf circumference in centimeters
  • Ck is the ankle circumference in centimeters

To calculate the ankle-to-calf ratio, divide ankle circumference by calf circumference in the same units. Earlier versions displayed the reciprocal, calf divided by ankle; that value is now labeled separately.

What is an Ankle to Calf Ratio?

The ankle-to-calf ratio describes lower-leg proportions. It does not diagnose circulation, swelling, fitness or leg health, and this calculator does not assign an ideal or healthy ratio.

How to Calculate Ankle to Calf Ratio?

The following steps outline how to calculate the Ankle to Calf Ratio.

  1. First, measure the circumference of your ankle (Ck).
  2. Next, measure the circumference of your calf (Ca).
  3. Finally, calculate the ankle to calf ratio using the formula R = Ck / Ca.
  4. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Ankle circumference (Ck) = 22 cm

Calf circumference (Ca) = 35 cm. The ankle-to-calf ratio is 22 / 35 ≈ 0.628571; the reciprocal calf-to-ankle ratio is 35 / 22 ≈ 1.590909.