Speed in metric: m/s for physics, km/h for cars.
Type a value, pick units
10
1 km/h = 0.2778 m/s
km/h ↔ m/s
To go from km/h to m/s, divide by 3.6. The other way, multiply by 3.6.
Try it
A car does 90 km/h. What's that in m/s?
90 ÷ 3.6 = 25 m/s.
Physics problems almost always want m/s (it pairs with metres and seconds). Everyday speeds — cars, wind, running — are usually quoted in km/h (or mph).
Your turn
A sprinter runs 10 m/s. Roughly how fast in km/h?
1 m/s = 3.6 km/h. Multiply by 3.6 to convert.