Power & Performance Calculators

Power meters have become accessible to club cyclists across the UK, and understanding your power data is the key to unlocking meaningful performance gains. The watts per kilo calculator is the simplest and most revealing metric in cycling — it directly determines how fast you climb and is the benchmark used by British Cycling for everything from talent development to race categorisation. Our power to speed calculator goes further, estimating your flat and climbing speed from wattage by accounting for aerodynamic drag, rolling resistance, and gradient.

Aerodynamics dominate at higher speeds, particularly on exposed UK roads where crosswinds and headwinds are a constant factor. The CdA calculator helps you estimate your frontal drag area from field test data — useful for time triallists looking to quantify the benefit of aero equipment. The wind resistance calculator shows exactly how much extra power a headwind costs you, explaining why that ride along the Norfolk coast felt so much harder than the numbers suggested. For hill climbers, the climbing power calculator and VAM calculator quantify your ascending performance in watts and vertical metres per hour respectively.

The normalised power calculator is essential for interpreting data from variable-effort rides — the kind of riding that typifies UK road races and hilly sportives where power constantly fluctuates. Combined with the power duration calculator, which estimates how long you can sustain different power outputs, these tools help you pace efforts intelligently and set realistic targets for events like the Fred Whitton Challenge or the Dragon Ride.