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Free e-bike tool

E-bike Range
Calculator.

Estimate how far your electric bike will go from its battery size, assist level and terrain, with the Eco and Turbo range either side of your setting.

Your e-bike
Estimated range
27
miles
43 km
Short Medium Long
Energy use 18.8 Wh/mi
Eco range (best case) 40 mi
Turbo range (hard case) 18 mi

An estimate, not a guarantee. Cold weather, headwind, tyre pressure and stop-start riding all shorten real range, so plan around the middle of these numbers.

The maths

How the calculator works

Range is battery energy divided by how much energy each mile costs. The battery is fixed; everything else on this page changes the cost per mile.

Wh
Battery energy = your watt-hours. Volts times amp-hours if it is not printed directly, e.g. 36V × 14Ah = 504 Wh.
/mi
Energy per mile = a base figure for your assist level, scaled up for hilly terrain and extra weight. Eco is about 10 Wh/mi, Turbo over 20.
÷
Range = battery watt-hours ÷ energy per mile. A 500 Wh battery at 15 Wh/mi is about 33 miles.
±
Eco & Turbo The same battery and terrain in the lightest and heaviest assist, so you can see the spread you can ride within.

The biggest lever is your assist level, followed by terrain, then weight. To stretch a battery, drop an assist level and pedal actively rather than letting the motor carry you. Keep tyres firm and, in winter, keep the battery warm before you set off.

Want a printable e-bike range chart?
A one-page battery-to-range reference chart is coming soon to our shop.
FAQ

E-bike range FAQ

Most e-bikes travel between 20 and 60 miles on a charge, depending on battery size, assist level, terrain and rider weight. A 500 watt-hour battery in a middle assist setting on rolling terrain covers roughly 25 to 30 miles. Eco mode on flat ground can more than double that; Turbo up hills can halve it.

Divide your usable battery energy in watt-hours by how much energy you use per mile. A typical rider draws 10 watt-hours per mile in Eco and over 20 in Turbo. So a 500 watt-hour battery at 15 watt-hours per mile gives about 33 miles. Hills and extra weight raise the watt-hours per mile and shorten the range.

A watt-hour (Wh) is the battery energy. If your battery lists volts and amp-hours, multiply them: a 36 volt, 14 amp-hour battery is 504 Wh. Many bikes print the Wh figure directly on the battery or in the manual. Enter that number here to estimate range.

Manufacturer range figures use ideal conditions: light rider, Eco mode, flat ground, warm weather and a fresh battery. Real rides add hills, headwind, stop-start riding, cold temperatures and higher assist, all of which raise energy use per mile. Treat claimed numbers as a best case and plan around the middle of the range.

Yes. A heavier rider, cargo or a trailer all take more energy to move, especially when accelerating and climbing, so range drops. It is a smaller factor than terrain or assist level, but on a hilly loaded ride the extra weight can noticeably shorten how far you get.

Use a lower assist level, keep your tyres properly inflated, carry less weight, and pedal actively rather than letting the motor do all the work. Smooth, steady riding uses less energy than hard accelerations. In cold weather, keeping the battery warm before a ride also helps preserve capacity.