Electric Unicycle Range Calculator: Miles per Charge From Your Battery

How the calculator works

Range = battery watt-hours x usable share / watt-hours per mile. With the defaults (1,500 Wh, 85% usable, 28 Wh per mile) that is 1,500 x 0.85 / 28 = about 46 miles. Every input can be changed; the result is a planning figure, not a promise, because rider weight, speed, temperature, tire pressure and hills all move it.

Where each default comes from

Battery capacity: 1,500 Wh

A mid-size commuter pack. InMotion's V11Y has exactly 1,500 Wh. Replace it with your wheel's figure from the maker's spec sheet. If the sheet gives amp-hours, multiply by the pack's nominal voltage first (our battery voltage guide shows how).

Easy riding: 20 Wh per mile

This is the efficiency implied by makers' best-case range figures. InMotion's V9 claims 37 miles from 750 Wh "under ideal conditions" (20.3 Wh per mile). The V11Y's 74.56-mile maximum from 1,500 Wh works out to 20.1, and King Song's S18 Pro+ claims 55 miles from 1,110 Wh, or 20.2. Use it for light riders cruising on flat ground in mild weather.

Mixed city riding: 28 Wh per mile

King Song publishes range examples for its 840 Wh 16S Pro, and its 180 lb rider on mixed hills "may get about 31 miles," which is 27.1 Wh per mile. InMotion calls 20 to 30 miles typical for the 750 Wh V9; the middle of that band, 25 miles, is 30 Wh per mile. The default of 28 sits between the two.

Fast, hilly or heavy riding: 40 Wh per mile

King Song's own range for the S19 Pro, a 73 lb suspension wheel, is 40 to 50 miles from 1,776 Wh, or 35.5 to 44.4 Wh per mile. InMotion says the V9 should give at least 15 miles "regardless of conditions," a worst case of 50 Wh per mile. The 40 default sits inside the S19 Pro band and below the V9's floor. InMotion's FAQ also notes that heavier riders may see less range.

Usable share: 85%

This one is our assumption, not a maker figure. Wheels get more cautious near empty: King Song's 16S Pro FAQ lists low-battery alerts, current limiting, forced deceleration and pedal tilt-back among its protections. Keeping a 15% reserve means you plan to arrive before those start to bite. Because the watt-hours-per-mile figures above were worked from the makers' full-pack range numbers, the 85% default returns 85% of what those examples imply. Set it to 100% to reproduce the makers' examples exactly.

Worked examples against the makers' own figures

Wheel and battery	Easy (20)	Mixed (28)	Hard (40)	What the maker says
King Song 14D Pro, 420 Wh	17.9 mi	12.8 mi	8.9 mi	25 miles under ideal conditions
InMotion V9, 750 Wh	31.9 mi	22.8 mi	15.9 mi	At least 15, typically 20 to 30, 37 ideal
King Song 16S Pro, 840 Wh	35.7 mi	25.5 mi	17.9 mi	About 36 (150 lb, flat), 31 (180 lb, hills), 26.7 (220 lb, city)
King Song 18XL Pro, 1,554 Wh	66.0 mi	47.2 mi	33.0 mi	87 miles, no conditions given
King Song S19 Pro, 1,776 Wh	75.5 mi	53.9 mi	37.7 mi	40 to 50 miles depending on conditions

All rows use the 85% usable default. Two things stand out. Where makers give conditions (the V9 and 16S Pro), the easy-to-hard spread covers their typical figures, and setting the usable share to 100% reaches their best cases. Where they give a single maximum with no conditions (the 18XL Pro's 87 miles), even the easy profile comes in well short, so treat such maximums with care. The S19 Pro's own modest figure fits the hard profile, which suits a heavy suspension wheel.

One more data point with stated conditions: Begode says its 300 Wh A2 gives approximately 15 to 20 km for a rider of about 70 kg at around 20 km/h, which is 24 to 32 Wh per mile, close to the mixed default.

What moves your real range

• Rider weight. King Song's 16S Pro examples fall from about 36 miles for a 150 lb rider to 26.7 for a 220 lb rider.
• Speed and hills. Both makers list riding speed and hills (InMotion says incline and terrain) among the main range factors.
• Temperature, wind and tire pressure. InMotion's V9 FAQ lists all three as range factors; our guide to winter riding and battery storage covers the cold.
• Battery age. Packs hold less as they age, so leave margin on a wheel you plan to keep for years.

Use the result

For a commute, halve your planning range for the round trip unless you can charge at work, and keep a reserve on top. To see how long a recharge takes, use our charging time calculator. To choose a wheel by range, see our commuting picks, which list a planning range for each, or the buying guide.