Workshop tool · Fit estimate
Bicycle Frame Size & Fit Calculator
Get a more tailored starting size using your proportions, riding style and bike category. The size is a shortlist—not a guarantee that a particular frame will fit.
1. Enter your measurements
Your estimated fit
RECOMMENDED STARTING SIZE
56 cm
Likely road frame size, based on your measurements.
Saddle height
74.2 cm
BB centre to saddle top
Adjacent sizes to test
54 / 56
Nominal seat-tube labels
Saddle-to-bar drop
2–5 cm
Starting range, not a requirement
Body proportion
Balanced
Torso and arm length relative to height
Why this size?
Your inseam gives a starting seat-tube estimate; torso and arm length help judge whether you may prefer a shorter or longer cockpit.
Use geometry, not the label alone
When comparing specific frames, prioritise stack and reach, then check effective top tube, seat-tube angle, standover and seatpost limits. Size labels are not standardised between brands.
Suggested setup order
- Set saddle height as a starting point and confirm it while pedalling.
- Adjust saddle fore/aft and handlebar reach independently.
- Change one variable at a time and reassess comfort and control.
Accuracy note: no body-measurement formula can identify an exact frame size across every brand. The calculator estimates a nominal size; a manufacturer’s geometry chart and a test ride are needed to choose a specific frame confidently.
Runs locally in your browser. Measurements are not sent to a server. Formula-based estimates are starting points only and do not diagnose or prevent cycling injuries.