Cycling
Every cycling calculator on CalcEngines — rates and averages, scoring and standings, and plain explanations of the rules behind them, each one naming the governing body and the season its numbers come from.
8 calculators in this section
- Climbing Gradient and VAM CalculatorGradient both ways round — the road sign's tangent and the along-the-road sine — with the angle in degrees, and VAM, the vertical metres climbed per hour. The relation from VAM to watts per kilogram is printed with the two sources it came from, and the altitude caveat is printed without a correction, because none was published.
- Cycling Speed from Cadence and Gearing CalculatorThe whole chain from pedal revolutions per minute to kilometres per hour, written out link by link: teeth to gear ratio, gear ratio to metres per crank revolution, metres per minute to km/h. Cycling's quantity is speed, not pace, and this page says why.
- FTP and Power Zones CalculatorA power figure as a percentage of functional threshold power, placed in a zone under either of the two published renderings of Coggan's seven levels — which disagree above 120% — with the watts at every boundary printed so you can apply a scheme this page does not carry.
- Gear Ratio and Gain Ratio CalculatorAll four ways of describing one bicycle gear — gear ratio, gear inches, metres of development and Sheldon Brown's gain ratio — with what each one ignores printed beside it. Only the gain ratio contains the crank length, which is why two bikes in the same gear can be geared differently.
- Normalised Power and Intensity Factor ExplainerWhat Normalised Power is for, why the fourth power pulls it above a ride's average, and why this site computes no figure for it. The algorithm is published free by its own proprietor — the obstacle is that it needs the whole second-by-second power trace and this engine holds no time series at all.
- Power to Weight Ratio CalculatorWatts per kilogram, both the conventional rider-only figure and the whole-system one that actually governs a climb, with a plain account of what the ratio predicts and what it does not. No category table, because none was found published free.
- UCI Bike Weight and Dimension Limits InterpreterWhether a measurement is inside the UCI's technical regulation for the bicycle, by article number, under either of two editions — because one of these rules changes between them. A whose-rule page: these limits bind a UCI-registered event and nothing else.
- Wheel Circumference and Odometer Calibration CalculatorThe nominal rolling circumference from an ISO 5775 tyre marking, the roll-out you actually measured, and what the difference between them costs your odometer over 100 km. The geometry is labelled as geometry, because no standard publishes a circumference.