Battery calculator
Volts × Ah → Watt-Hours
Watt-hours (Wh) are a useful way to compare the nominal energy stored in e-bike batteries.
48V × 20Ah = 960 Wh
Formula
Watt-hours = volts × amp-hours. For example, 48 × 20 = 960Wh. This is nominal battery energy, not a guaranteed amount of usable energy at the wheel.