The whole toolbox
Every calculator, in one place
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.
Range & Performance
How far it goes, how fast it goes, and what the hill will cost you.
Scooter Range Calculator
Real range from your battery size, weight, speed, hills and temperature — not the number on the box.
Power to Top Speed
Solve for the speed where your motor power runs out against drag, weight and gradient.
Hill Climb Power
Watts, wheel torque and battery amps required to hold a speed on any gradient — plus your gradeability.
Speed Converter
Two-way speed conversion with the e-scooter speed limits that actually apply where you ride.
Battery & Charging
Capacity, charge time, state of health and honest degradation maths.
Charge Time Calculator
Charge time from capacity, charger amps and state of charge — including the slow CV taper at the top.
Watt-Hours Calculator
Convert between Wh, kWh, Ah and mAh — and check whether your battery can legally fly.
Battery Health (SoH)
Turn measured capacity or lost range into an SoH figure, then project the next three years.
EV Charging Time
Level 1, Level 2 or DC fast charging — with the onboard AC limit and the 80% taper handled properly.
Cost & Emissions
What a charge costs, what a car costs, and the carbon you skip.
Charging Cost
Cost per charge, per 100 km and per year — with charging losses included, unlike most calculators.
EV vs Gas Costs
Cost per 100 km, annual running cost and the break-even point against any petrol or diesel vehicle.
CO₂ Savings
Grid-aware emissions comparison against the car, bus or ride-hail trip you replaced.
Build & Wiring
Pack layout, motor winding, conductor sizing — for people with a soldering iron.
Battery Pack Builder
S and P counts to voltage, capacity, current limit, weight and cost — with real 18650 and 21700 cells.
Motor KV & RPM
No-load RPM, loaded RPM, wheel speed and torque for any winding, voltage and gear ratio.
Wire Gauge (AWG)
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.
New here?
Not sure which one you need?
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.