Treat your pack like an energy budget—not a guess on the dashboard. This guide explains how to estimate battery-backed range from watt-hours, usable SOC, and the losses that eat Wh before you reach your stop.
Benefits
- Starts from battery nameplate Wh and pack efficiency so estimates reflect net energy reaching the motor, not marketing stickers alone.
- Ties SOC to available watt-hours at ride time—critical when you leave home at 70% and need a round-trip margin.
- Connects rider mass, tyre pressure, and voltage platform to Wh/km so estimators stay honest on hills and stop-start city legs.
How it works
- Look up or measure pack capacity in Wh and apply a realistic efficiency factor (BMS + drivetrain).
- Multiply by current state of charge to get usable energy for the trip segment you are planning.
- Divide by expected Wh/km from the range tool—or benchmark from past rides—to estimate remaining battery range in km.
FAQ
What is an e-scooter battery range estimator?
It is a planning method that converts stored battery energy (Wh × SOC × efficiency) into expected distance using Wh/km for your weight, tyres, and route. It is not a GPS predictor—it is an engineering estimate you can reproduce before every commute.
Should I use nameplate Wh or measured capacity?
For new packs, nameplate Wh is a reasonable starting point. After a year or heavy cycles, derate 5–15% unless you have bench data. Estimators that ignore aging tend to over-promise on the return leg.
How does SOC change the estimate?
Usable energy scales roughly with SOC, but the last 20% often delivers less effective range because of voltage sag and controller current limits. Build a buffer instead of planning to 0%.
Technical specifications
- Core estimate: range (km) ≈ (Wh_pack × efficiency × SOC%) ÷ Wh_per_km.
- Wh/km varies with total mass, tyre pressure, surface, and acceleration profile.
- Nominal voltage (36 / 48 / 52 V) influences sag under load—not captured by Wh alone.
- Outputs are planning bounds; log real rides to calibrate your personal Wh/km factor.
From watt-hours to kilometres
Battery range estimation begins with energy accounting. A 504 Wh pack at 90% efficiency and 80% SOC delivers roughly 363 Wh to the road. If your calibrated route uses 18 Wh/km, that is about 20 km of planning range—before safety margin.
Calibrating Wh/km on your deck
Ride a known flat loop once at typical pressure and note Wh consumed from the app or charger (if available). Plug that Wh/km into the estimator instead of generic defaults. Small-wheel scooters often land between 15–25 Wh/km for mixed urban riding, but your mass and throttle habit matter more than averages.