Travel & transport
tools and calculators.
6 practical tools with clear inputs and explanations. Choose a tool below, or explore a role-based toolbox for a collection that fits your day.
Aerodynamic drag & power
Calculate drag and steady power from a supplied drag coefficient and area.
EV charging time & cost
Estimate an energy top-up using average power, efficiency and your tariff.
Tyre size comparison
Compare nominal geometry and speed ratios for two metric radial sizes.
Wheel width & offset comparison
Compare nominal inner and outer rim-edge positions.
Cycling gearing calculator
Relate chainring, sprocket, wheel rollout and cadence to geometric speed.
Vehicle ownership cost
Combine depreciation and your running-cost assumptions over an ownership period.