Calculate the femur-to-foot ratio or solve for femur or foot length from any two known values in centimeters or inches.

Use femur bone length, not thigh circumference. This ratio does not diagnose a condition or predict height or mobility.

Related Calculators

Femur To Foot Ratio Formula

The following formula is used to calculate the femur to foot ratio.

R = (Lf) / (Lfoot)

Variables:

  • R is the femur to foot ratio
  • Lf is the length of the femur
  • Lfoot is the length of the foot

To calculate the femur to foot ratio, divide the length of the femur by the length of the foot.

What is the Femur To Foot Ratio?

The femur to foot ratio is a measurement that compares the length of the femur (thigh bone) to the length of the foot. The ratio describes body proportions. This calculator does not provide a validated height estimate, population reference range, mobility assessment or clinical diagnosis; those require appropriate measurements and separately validated methods. The ratio is calculated by dividing the length of the femur by the length of the foot.

How to Calculate Femur To Foot Ratio?

The following steps outline how to calculate the Femur To Foot Ratio.

  1. First, measure the length of the femur (Lf).
  2. Next, measure the length of the foot (Lfoot).
  3. Next, calculate the ratio using the formula R = Lf / Lfoot.
  4. Finally, calculate the Femur To Foot Ratio.
  5. 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.

Length of Femur (Lf) = 50 cm

Length of Foot (Lfoot) = 25 cm. The ratio is 50 ÷ 25 = 2, or 2:1.