Speed Converter

Free speed converter — km/h, mph, m/s, knots, ft/s. Driving, running, sailing, aviation. Instant, accurate, runs entirely in your browser.

Runs in your browserUpdated Apr 27, 2026

From

Meter / second

2.777777778 m/s

Mile / hour

6.213711922 mph

Foot / second

9.113444153 ft/s

Knot

5.399572699 kn

Mach (sea level)

0.008098477486 Mach

Frequently asked questions

›How do I convert mph to km/h?

Multiply mph by 1.609. So 60 mph ≈ 96.6 km/h. Or just type it in.

›What is a knot?

A knot is one nautical mile per hour, equal to 1.852 km/h or 1.151 mph. Used in marine and aviation contexts.

›How fast is the speed of light?

Light in vacuum travels at exactly 299,792,458 m/s — that's about 670 million mph or 1.08 billion km/h.

›Are running paces supported?

You can convert between any speed units, but for pace conversions (e.g. min/km ↔ min/mile) use a dedicated running pace tool.

›Is the converter free?

Yes — free, no ads, runs in your browser.