Cycling Calculators
Power and efficiency tools from a competitive triathlete. FTP, gear ratios, and cycling performance.
Bike Fit Calculator
Saddle height = inseam x 0.
Try CalculatorBike Size Calculator
Frame size from inseam: Road = inseam x 0.
Try CalculatorBreakaway Success Calculator
Breakaway energy: solo rider needs ~30% more power than peloton.
Try CalculatorCadence-Speed Calculator
Speed from cadence and gear ratio: Speed = cadence x gear ratio x wheel circumference x 60 / 1000000 (km/h).
Try CalculatorCdA Aero Drag Calculator
CdA = drag force / (0.
Try CalculatorChain Length Calculator
Chain length = 2(chainstay/25.
Try CalculatorCritical Power Calculator
CP from two tests: CP = (W2-W1)/(T2-T1).
Try CalculatorCycling Calorie Calculator
Estimate calories burned cycling based on weight, duration, intensity, and terrain.
Try CalculatorCycling HR Zones Calculator
Cycling heart rate zones based on LTHR (Lactate Threshold Heart Rate).
Try CalculatorCycling Power Zones Calculator
Power-based training zones from FTP.
Try CalculatorCycling Speed Calculator
Speed = Distance / Time.
Try CalculatorCycling TSS Calculator
TSS = (duration_sec x NP x IF) / (FTP x 3600) x 100.
Try CalculatorCycling VO2max Estimator
Cycling VO2max from power: VO2max (ml/min) = 10.
Try CalculatorCycling Wattage Calculator
Estimates power output based on speed, weight, and gradient.
Try CalculatorE-Bike Range Calculator
Range = battery Wh / (avg consumption Wh/km).
Try CalculatorFTP Calculator
FTP from 20-minute test: FTP = 20min avg power x 0.
Try CalculatorGear Ratio Calculator
Gear ratio = chainring teeth / cog teeth.
Try CalculatorHill Climb Calculator
Climbing time = (elevation x weight x 9.
Try CalculatorIntensity Factor Calculator
IF = NP / FTP.
Try CalculatorNormalized Power Calculator
NP accounts for variability: 30s rolling avg, raise to 4th power, average, take 4th root.
Try CalculatorTire Pressure Calculator
Optimal tire pressure based on rider weight, tire width, and terrain.
Try CalculatorVO2max Calculator
Estimates VO2max from race performance using Jack Daniels VDOT tables.
Try CalculatorWatts per Kg Calculator
Power-to-weight ratio = Power (watts) / Body weight (kg).
Try CalculatorZone 2 Cycling Calculator
Zone 2 training for cycling: 55-75% FTP or 60-70% HRmax.
Try CalculatorZwift Route Time Calculator
Estimates Zwift route completion time from FTP and route profile.
Try CalculatorDone calculating? Start training.
Now use this data to generate power-based intervals.
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