Speed Converter

Convert speed between kilometres per hour, miles per hour, metres per second, knots and feet per second. Type a value and see it across every unit at once, exactly. A free speed converter that runs in your browser.

Turn a speed into the unit you need to read. Convert mph to km/h for a road sign abroad, km/h to mph for a car spec, or work in metres per second and knots for training apps, sailing and flying. Enter one figure and every unit fills in at once.

  • Exact, standard factors
  • 100% free
  • No sign-up, no app
  • Instant as you type
  • Works offline after first load
Read the guide: How to Convert mph to km/h
Convert
0.62137119mph
1 km/h = 0.62137119 mph

1 km/h in every unit

Metre per second0.27777778 m/s
Kilometre per hour1 km/h
Mile per hour0.62137119 mph
Foot per second0.91134442 ft/s
Knot0.5399568 kn

How to use it

  1. 1

    Enter a speed

    Type the value you have, like 60 mph or 100 km/h.

  2. 2

    Set the units

    Choose the unit you entered and the one you want, then swap for the reverse.

  3. 3

    See them all

    Read km/h, mph, m/s, knots and ft/s together, and copy any of them.

When it comes in handy

Driving abroad

Convert a km/h speed limit to mph, or the reverse, so you read road signs correctly.

Running and cycling

Switch a pace between km/h and mph, or work in metres per second for some training apps.

Sailing and flying

Convert knots to km/h or mph to understand wind and craft speed.

Instant, exact & 100% in your browser

The conversion runs right here in your browser using exact, standard factors. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.

Frequently asked questions

How do I convert mph to km/h?
Multiply miles per hour by 1.609344 to get kilometres per hour. So 60 mph is about 96.6 km/h. To go from km/h to mph, divide by the same number. A rough mental check is that km/h is always the larger number for the same speed.
What is a knot?
A knot is one nautical mile per hour, which is about 1.852 km/h or 1.151 mph. It is used in sailing, aviation and meteorology because it ties neatly to nautical miles and lines of latitude.
How do I convert km/h to metres per second?
Divide kilometres per hour by 3.6 to get metres per second, since there are 3,600 seconds in an hour and 1,000 metres in a kilometre. So 36 km/h is exactly 10 m/s. Physics problems usually want m/s, which is the most common reason people make this switch.

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