Skip to main content
Calcimator

Bike Fit Calculator

Calculate ideal frame size, saddle height, reach, and handlebar drop from your body measurements for a comfortable and efficient cycling position.

Inputs

in
in
in
in

Results

Recommended Frame Size

55.4 cm

≈ 6 credit cards

Saddle Height (BB to top)72.4 cm
Effective Reach56.9 cm
Handlebar Drop12 cm
Stack60.5 cm
Estimated Stem Length60 mm
Crank Length Recommendation172.5 mm
How to Use This Calculator
  1. Measure and enter your Inseam Length, Torso Length, Arm Length, and Height in centimeters.
  2. Review the Recommended Frame Size in centimeters.
  3. Use Saddle Height (BB to top) as your starting saddle adjustment.
  4. Check Reach, Handlebar Drop, Stack, Stem Length, and Crank Length recommendations.
  5. Adjust from these baselines during a professional fit session for final fine-tuning.

How the result changes with Inseam Length

Inseam LengthRecommended Frame Size
6442.8 cm
7449.8 cm
8658.2 cm
9665.2 cm

What each input means

Inseam Length
Measure from the floor to your crotch while standing barefoot against a wall.
Torso Length
Distance from the top of your hip bone (iliac crest) to the sternal notch at the base of your neck.
Arm Length
Measure from the acromion (bony point of shoulder) to the center of your closed fist.
Height
Your total standing height in centimeters.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Inseam Length = 82, Torso Length = 58, Arm Length = 63, Height = 178 = 4 input(s) provided
  2. Calculate Recommended Frame Size
    Recommended Frame Size
    55.4 = 55.4
  3. Calculate Saddle Height
    Saddle Height
    72.4 = 72.4
  4. Calculate Effective Reach
    Effective Reach
    56.9 = 56.9

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Cycling & Bike Training

Tire Pressure Calculator

Calculate optimal front and rear tire pressure based on rider weight, tire width, and terrain for the best balance of speed, grip, and comfort.

Mechanical Engineering

Gear Ratio Calculator

Calculate gear ratio, output speed, output torque, and mechanical advantage for a simple gear pair.

Bicycle

Bicycle Fit Calculator

Saddle height, reach, and drop from body measurements.

Triathlon

Tri Bike Fit Calculator

Estimate triathlon aero position geometry from body measurements including saddle height, aerobar reach, frame size, and crank length.

Cycling & Bike Training

Gear Ratio Calculator

Calculate gear ratio, speed at any cadence, gear inches, and development from chainring, cog, and wheel size.

More in Sports, Outdoors & Recreation.