Converters

Speed converter

km/h, mph, m/s and knots, plus the time to cover 100 km.

Embed this calculator on your website

Copy this code and paste it into your page (WordPress, Wix, Webflow, HTML…). It's free: please keep the link to HOD Calc.

<iframe src="https://calc.hod-group.com/embed/?hodtool=speed&amp;hodlang=en" title="Speed converter" loading="lazy" style="width:100%;max-width:720px;height:560px;border:0;border-radius:12px" data-hodcalc></iframe>
<p style="font:13px sans-serif;margin:6px 0 0">Calculator by <a href="https://calc.hod-group.com/en/speed-converter/">HOD Calc</a></p>
<script async src="https://calc.hod-group.com/assets/embed.js"></script>

How it works

1 mph = 1.609 km/h, 1 m/s = 3.6 km/h, 1 knot = 1.852 km/h.

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

Speed120
Unitkm/h

you get:

mph74.56 mph
km/h120 km/h
m/s33.33 m/s
Knots64.79 kn

Frequently asked questions

How does the “Speed converter” tool work?

1 mph = 1.609 km/h, 1 m/s = 3.6 km/h, 1 knot = 1.852 km/h.

What do I need to enter?

Just fill in: speed, unit. The result updates as you type.

Can you give an example?

Speed: 120; Unit: km/h → mph: 74.56 mph; km/h: 120 km/h.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.