Cycling Wattage Calculator
Cycling Wattage Calculator
0 = flat · negative = downhill
CdA ≈ 0.32 drops · 0.40 hoods · 0.28 aero · Crr ≈ 0.004–0.006
| Component | Value |
|---|---|
| Rider + Bike Weight | 80.0 kg |
| Speed | 30.0 km/h |
| Grade | 2.0% |
| Aero Drag Power | 113 W |
| Rolling Resistance Power | 33 W |
| Gravity Power | 131 W |
| Total Power | 277 W |
| Power-to-Weight | 3.46 W/kg |
Where the Power Goes
About the Cycling Wattage Calculator
Required power is the sum of three resistances: aero drag (½·ρ·CdA·v³), rolling resistance (Crr·m·g·cosθ·v), and gravity on grades (m·g·sinθ·v). Because aero scales with the cube of speed, doubling your speed needs eight times the air-resistance power.
W/kg Matters More Than Watts
On climbs, gravity power is proportional to mass, so the fair comparison is power-to-weight ratio. A 60 kg rider producing 240 W (4.0 W/kg) climbs far faster than an 85 kg rider at 300 W (3.5 W/kg) — this calculator reports both.
Frequently Asked Questions
Related Calculators
Home Loan Calculator
Calculate home loan EMI, total interest, and amortization schedule.
Auto Loan Calculator
Detailed auto loan with trade-in, taxes, fees, and amortization.
Bike Loan Calculator
Calculate bike loan EMI, total cost, and repayment breakdown.
Boat Loan Calculator
Estimate boat financing payments, interest, and amortization.
Student Loan Calculator
Calculate student loan payments with income-driven repayment plans.
Gold Loan Calculator
Calculate gold loan amount based on gold weight, purity, and LTV ratio.
USDA Loan Calculator
Calculate USDA loan payments with guarantee fee and income eligibility.
Loan Against Property Calculator
Calculate LAP EMI based on property value and loan-to-value ratio.