Speed Converter
km/h, mph, m/s, ft/s and knots.
Your result appears here
Fill in the fields on the left and press Calculate. The answer, the breakdown and a copy button all land in this card.
How it is calculated
Convert the input to metres per second, then divide by the target unit's m/s value.
1 km/h = 0.2777… m/s; 1 mph = 0.44704 m/s; 1 knot = 1.852 km/h.
Worked example
100 km/h × 0.277778 = 27.78 m/s, which is 62.14 mph.
Questions people ask
Multiply by 0.6. 100 km/h estimates to 60 mph against an exact 62.1 — fine for road signs.
A knot is one nautical mile per hour, and a nautical mile matches a minute of latitude, which makes chart navigation arithmetic simple.