Fourteen tools covering range and performance, batteries and charging, running costs and emissions, and the wiring maths that keeps a build safe. All free, all in the browser.
How far it goes, how fast it goes, and what the hill will cost you.
Background: How far can an electric scooter really go? · Typical values: consumption and range
Real range from your battery size, weight, speed, hills and temperature — not the number on the box.
Solve for the speed where your motor power runs out against drag, weight and gradient.
Watts, wheel torque and battery amps required to hold a speed on any gradient — plus your gradeability.
Two-way speed conversion with the e-scooter speed limits that actually apply where you ride.
Capacity, charge time, state of health and honest degradation maths.
Background: The charging rules that actually extend battery life · Typical values: battery voltages and capacity
Charge time from capacity, charger amps and state of charge — including the slow CV taper at the top.
Convert between Wh, kWh, Ah and mAh — and check whether your battery can legally fly.
Turn measured capacity or lost range into an SoH figure, then project the next four years.
Level 1, Level 2 or DC fast charging — with the onboard AC limit and the 80% taper handled properly.
What a charge costs, what a car costs, and the carbon you skip.
Background: EV charging levels explained: L1, L2 and DC fast · Typical values: constants and grid intensity
Cost per charge, per 100 km and per year — with charging losses included, unlike most calculators.
Cost per 100 km, annual running cost and the break-even point against any petrol or diesel vehicle.
Grid-aware emissions comparison against the car, bus or ride-hail trip you replaced.
Pack layout, motor winding, conductor sizing — for people with a soldering iron.
Background: 18650 vs 21700: choosing cells for a scooter pack · Typical values: cells and wiring
S and P counts to voltage, capacity, current limit, weight and cost — with real 18650 and 21700 cells.
No-load RPM, loaded RPM, wheel speed and torque for any winding, voltage and gear ratio.
Required AWG from current, run length and acceptable voltage drop — with real copper resistance data.
Nothing matches that. Try range, battery, charge, cost, wire or motor.
Three ways people arrive here, and where each one should start.
Ignore the range on the box and work out your own. The range calculator uses your weight, speed and hills; the watt-hours calculator lets you compare two batteries fairly instead of trusting amp-hours. Once a shortlist forms, the running-cost comparison shows what you save against the car it replaces.
Get the most from the battery you already have. The charge time calculator explains the 80 percent habit that extends pack life, the battery health calculator tells you whether a shorter range means a tired cell or just a cold morning, and the charging cost calculator puts a figure on every top-up.
For anyone with a soldering iron. The pack calculator turns a cell and an S/P layout into voltage, capacity and a current limit; the wire gauge calculator sizes the conductors for that current; and the KV and RPM calculator matches a motor to your wheel and gearing.
It depends on why you are here. Shopping for a scooter starts with range and watt-hours. Living with one you already own starts with charge time and battery health. Building or repairing a pack starts with the pack layout and wire gauge tools.
No. Most tools accept volts and amp-hours and convert for you, and the watt-hours calculator turns any figure — mAh, Ah or kWh — into the number the other tools want.
The physics is the same for e-bikes, electric motorbikes and cars; only the inputs change. Riding position and surface default to scooter values, and you can change both. The battery, charging and wiring tools apply to any lithium pack.
Every tool shows its formula and the constants it assumes, and the range and speed tools are calibrated against measured scooter consumption rather than scaled from bicycle data. Treat the output as a well-founded estimate, not a guarantee, and keep a margin.
If you are buying, start with range and watt-hours. If you already ride, start with charge time and battery health. If you are building, start with the pack and wire gauge calculators.