Speed Converter
Convert between km/h, mph, and m/s.
From
To
Quick Speed Reference
| From | To | Conversion |
|---|---|---|
| km/h (km/h) | mph (mph) | mph = km/h × 0.621371 |
| mph (mph) | km/h (km/h) | km/h = mph × 1.60934 |
| m/s (m/s) | km/h (km/h) | km/h = m/s × 3.6 |
| km/h (km/h) | m/s (m/s) | m/s = km/h ÷ 3.6 |
Common Speed Conversions
A 100 km/h motorway
Convert km/h to mph.
100 × 0.62137162.14 mph
A 60 mph US highway
Convert mph to km/h.
60 × 1.6093496.56 km/h
A 5 m/s jog
Convert m/s to km/h.
5 × 3.618 km/h
A 100 km/h motorway speed
Convert km/h to m/s.
100 ÷ 3.627.78 m/s
Speed Conversion Questions
How do I convert km/h to mph?+
Multiply by 0.621371. For example, 100 km/h × 0.621371 = 62.14 mph.
What is 100 km/h in mph?+
62.14 mph.
Which countries use mph instead of km/h?+
The US, UK, Liberia, and Myanmar use mph.
How do I quickly convert speed limits while driving?+
Use the 0.6 rule: multiply the km/h number by 0.6.
What is 60 mph in km/h?+
96.56 km/h.