Type a number in any box and the rest update as you go — plus a reference table of e-scooter speed limits by country, because 25 km/h and 15.5 mph are the same number arguing in two languages.
How fast is 25 km/h in mph?
25 km/h is 15.5 mph, and 20 mph is 32.2 km/h. To convert, divide km/h by 1.609344 to get mph, or multiply mph by 1.609344 to get km/h. 25 km/h is the usual European e-scooter speed limit; 20 mph is the most common US cap.
The conversions worth memorising
One mile per hour is 1.609344 km/h, so the quick mental version is "add 60%". The numbers that matter for micromobility are worth knowing outright: 25 km/h is 15.5 mph, 20 mph is 32.2 km/h, 45 km/h is 28 mph and 15 mph is 24.1 km/h.
For physics work you often need metres per second, because that is what drag and power equations expect. Divide km/h by 3.6 to get m/s: 25 km/h is 6.94 m/s. Knots appear in wind forecasts, and headwind matters more to a scooter rider than to almost any other road user — one knot is 1.852 km/h.
Why 25 km/h keeps showing up
The 25 km/h cap comes from EU vehicle classification. Below it, a light electric vehicle avoids being regulated as a moped, so nearly every scooter and e-bike sold in Europe is firmware-limited to exactly that. The UK inherited the same threshold for e-bikes at 15.5 mph, which is 25 km/h rounded.
The US is a patchwork. Most states cap rental and private e-scooters at 15–20 mph, with 20 mph (32 km/h) the most common figure, and some cities set their own lower limits in parks and on shared paths. Always check the local rule rather than the machine's capability — a 60 km/h scooter is not legal anywhere just because it exists.
E-scooter speed limits around the world
Speed caps for private electric scooters, as commonly applied. Micromobility law changes frequently and cities routinely set lower limits than their national government — treat this as orientation, then check your local rules before you ride.
| Where | Limit | In mph | Notes |
|---|---|---|---|
| European Union (general) | 25 km/h | 15.5 | Above this, treated as a moped |
| Germany | 20 km/h | 12.4 | eKFV rules; insurance sticker required |
| France | 25 km/h | 15.5 | Pavement riding prohibited |
| Italy | 20 km/h | 12.4 | 6 km/h in pedestrian areas |
| Spain | 25 km/h | 15.5 | Municipal rules vary widely |
| United Kingdom | 25 km/h | 15.5 | Private e-scooters still restricted to private land |
| United States (typical) | 32 km/h | 20 | Set state by state; 15 mph in many parks |
| Canada (typical) | 24 km/h | 15 | Province and municipality dependent |
| Australia (typical) | 25 km/h | 15.5 | 10 km/h on some footpaths |
| Japan | 20 km/h | 12.4 | 6 km/h in walking mode on footways |
| Singapore | 25 km/h | 15.5 | Cycling paths only; device registration required |
Why the display and the GPS disagree
Scooter speedometers do not measure speed. They count motor revolutions and multiply by an assumed wheel circumference, so anything that changes the real circumference — a worn tyre, low pressure, a different wheel size — biases the reading. In practice most displays read 3–8% high, which flatters the specification sheet and is rarely corrected in firmware.
If you want a true figure, use a phone GPS app on an open straight road, run it in both directions and average the two. That cancels out wind and any slope. It is also the honest way to check whether the power-to-speed calculator matches your machine.
How the converter works
Every unit is converted through km/h using exact definitions — the international mile and the nautical mile are both fixed lengths, so there is no rounding until the display. Pace is simply the conversion turned upside down: time per distance instead of distance per time.
The stopping distance adds the ground covered during a one-second reaction to the braking distance at 0.6 g, a realistic deceleration for a scooter with good brakes on dry asphalt. The braking part grows with the square of speed, which is why it climbs so quickly above 25 km/h.
The formulas
km/h → m/s ÷ 3.6
minutes per km = 60 ÷ (km/h)
Related calculators
Once you have the speed you want, the power-to-speed calculator tells you how many watts it takes to hold it, and the range calculator shows how far the battery will carry you at that pace.
Questions riders actually ask
How fast is 25 km/h in mph?
25 km/h is 15.53 mph. It is the EU limit for light electric vehicles and the reason so many scooters and e-bikes are advertised at "15.5 mph" in the UK.
What is 20 mph in km/h?
20 mph is 32.19 km/h. This is the most common US e-scooter speed cap and roughly where a scooter with 600–750 W of continuous power naturally tops out with an average rider.
Why do scooter manufacturers quote different speeds for the same model?
Regional firmware. The same hardware ships limited to 25 km/h for the EU, 20 mph for much of the US and sometimes unrestricted for markets with no cap. Weight of the test rider and battery charge level also shift the figure by a few km/h.
How do I convert a speed into pace?
Pace is time per unit distance: minutes per km equals 60 ÷ (km/h). At 25 km/h you cover a kilometre in 2 minutes 24 seconds. It is a useful sanity check for commute planning, since it turns an abstract speed into a door-to-door number.
How far does a scooter take to stop from 25 km/h?
About 11 metres on dry asphalt: roughly 7 m covered during a one-second reaction, then 4 m of braking at 0.6 g. At 20 mph (32 km/h) it grows to about 16 m, because braking distance rises with the square of speed. Wet roads, worn pads and small solid tyres all add to it.
Sources
Primary and reference sources for the physics, standards and figures used on this page.
- Unit conversionNIST
- Regulation (EU) No 168/2013 on L-category vehiclesEUR-Lex
- Elektrokleinstfahrzeuge-Verordnung (eKFV)German Federal Ministry of Justice
- Using a rental e-scooterGOV.UK