Saddle Height Calculator

Saddle height is the most important fit number on your bike. Too low and you waste power and stress your knees; too high and you rock your hips, strain your hamstrings, and risk saddle sores. This saddle height calculator uses your inseam to estimate the right height with two proven methods — the LeMond formula and the Holmes range — measured from the bottom-bracket center to the top of the saddle.

The Two Methods

Both methods start from your inseam, the single best predictor of leg-extension geometry.

• LeMond — popularized by three-time Tour winner Greg LeMond, this gives a single clean starting height. Multiply inseam by 0.883 and measure along the seat tube from the bottom-bracket center to the saddle top.
• Holmes — based on knee-angle research, this gives a small range so you can fine-tune toward a 25–35° knee bend at the bottom of the pedal stroke.

Worked Example

With an 82 cm inseam: LeMond gives 82 × 0.883 = 72.4 cm. The Holmes range spans 82 × 0.872 to 82 × 0.892 = 71.5–73.1 cm. Start at the LeMond figure, then adjust within the Holmes band by feel.

Inseam to Saddle Height Reference

How to Set It on the Bike

Measure straight along the seat tube from the center of the bottom-bracket axle to the top of the saddle. Adjust the seatpost, tighten to the recommended torque, then ride. Your hips should stay level on the saddle and your knee should retain a slight bend — never lock out — at the bottom of each stroke.

Fine-Tuning Signs

• Pain at the front of the knee: saddle is likely too low — raise it a few mm.
• Pain behind the knee or rocking hips: saddle is too high — lower it.
• Numbness or saddle sores: check height and saddle tilt together.

Disclaimer: These formulas give a reliable starting height but do not account for cleat position, crank length, flexibility, or injuries. If you experience persistent knee or back pain, stop adjusting by guesswork and consult a professional bike fitter.