VelosplitCycling calculators
Quick answers to single questions, worked out with the same physics as the race power planner. A calculator never disagrees with the planner for the same inputs, because both run the same code.
Watts per kg
Work out your watts per kg from FTP and weight, see where it sits on Coggan's power profile chart, and why W/kg decides climbs but not flat roads.
Power to speed
Work out your cycling speed from watts, weight, gradient, wind and altitude with the Velosplit planner's physics, plus the time to ride a given distance.
CdA estimator
Estimate your cycling CdA and frontal area from height, weight and riding position, and see what the drag area does to your speed at a given power.
The equations behind every result, with their sources, are on the methodology page.