How the calculation works
The ideal range is simple physics: battery watt-hours divided by efficiency. A 3 kWh (3,000 Wh) pack at 30 Wh per km is 100 km — that is also roughly what a test cycle measures, because test cycles assume a gentle throttle, a flat road and a single average-sized rider. Everything the rider adds on top comes off that number, and the factors above are measured from owner reports rather than marketing: pillion weight adds rolling resistance and torque demand, speed raises aerodynamic loss with the square of velocity, climbs borrow energy that descents only partly return, and battery chemistry simply delivers less when cells are very hot or cold.
The third result is the one that matters daily. You should rarely charge from 0 to 100% — lithium packs age slowest between roughly 20 and 80 percent, so the energy you can comfortably use each day is about 60% of the pack. A scooter with a 100 km real range therefore offers about 60 km of relaxed daily riding before you even think about plugging in. If your commute is 30 km round trip, you can forget the charger exists on weekdays. If the daily-usable number is close to your daily distance, you will be charging every night at 20% depth — workable, but tighter.
Want the money side of the same equation? Pair this with the charging cost calculator — the same efficiency figure drives both — and see what each real kilometre costs you. And if the number that came out seems low, read why EVs never show the claimed range before blaming the vehicle.