Electric Scooter Charging Time and Cost Per Mile Calculator

This calculator converts a scooter's battery size and your electricity rate into an actual charging time and cost per mile. Charging time is simple division once you know the numbers, and the cost is almost always smaller than people expect, usually well under a cent per mile. Enter your battery's watt-hours, your charger's wattage and your electricity rate to see both numbers for your specific scooter.

Charging time is battery watt-hours divided by charger wattage, plus roughly 45 minutes of slow top-off at the end while the battery balances its cells. A standard stock charger for many scooters is a 42V 2A unit, which delivers about 84 watts. Cost is battery watt-hours converted to kilowatt-hours (divide by 1,000) multiplied by your local electricity rate, commonly around 17 cents per kWh nationally, though your actual utility rate may differ.

A 281 Wh battery (36V x 7.8Ah) on an 84 watt stock charger takes 281 / 84, about 3.3 hours, plus the 45 minute top-off, so a little over 4 hours total. The cost is 281 Wh / 1,000 = 0.281 kWh, times 17 cents, about 4.8 cents for a full charge, right in the 5 to 11 cent range typical across the catalog. A larger 551 Wh battery on the same charger takes about 7.5 hours and costs closer to 9 to 10 cents per full charge.

This is charging cost, not total cost of ownership; it does not include tires, brake pads, or occasional part replacement, which add a modest amount over a year but are still far smaller than driving costs. It also assumes a healthy battery at or near its rated capacity; an older battery that has lost some capacity to charge cycles will take somewhat less time and cost less per charge simply because it holds less energy overall, not because it is more efficient.