Estimate cycling burn from weight, speed, and distance with speed-based MET bands. Price a 40 km weekend ride in calories — free, local, estimate only.
Estimate workout burn across running, cycling, swimming, yoga, and lifting from weight and duration. Price a 45-minute run in calories — free, local, estimate only.
Convert step counts to calorie burn with weight-adjusted math. Learn what 12,000 steps really cost — free, local, estimate only.
Estimate calories burned making breast milk by baby age and feeding frequency, at ~0.67 kcal per mL. Fuel milk production without guessing — free, local, informational only.
Estimate travel time from distance and speed — with optional arrival time and traffic buffer. Add traffic buffers and arrival targets for realistic plans — free, local, no signup.
Model SaaS unit economics — ARPU, CAC, churn, opex, and COGS sliders with LTV:CAC health bands and a 12-month projection. Price the Growth tier that converts — free, local, no signup.
Speed sets the MET band (4/6/8/10/12 across <16 to 30+ km/h) times weight times hours. Defaults (80 kg, 30 km at 25 km/h = 1.2h, MET 10) burn 960 kcal. Speed, weight, and distance drive the number.
Yes at high assist — motor watts replace leg watts. Log assist level honestly or totals inflate.
A 10 km each-way commute burns ~400–500 daily — real training volume hiding in routine. Track weekly, not daily.
No — estimates compute locally in your browser. Nothing leaves your device.
Calories Burned Calculator
Estimate workout burn across running, cycling, swimming, yoga, and lifting from weight and duration. Price a 45-minute run in calories — free, local, estimate only.
Heart Rate Zone Calculator
Calculate heart rate training zones by age. Find your target heart rate ranges for different exercise intensity levels. Health data never leaves your device — every calculation runs locally in your browser.
Last updated October 2026