Speed Converter icon
Free · No signup · Instant results · Updated 2026-09-17

Speed Converter

Answer: Speed converts distance per time: mph to km/h multiply by 1.609344; m/s to km/h multiply by 3.6.

About this tool

Free speed converter for mph, km/h, m/s, and knots.

10 mph =
16.09344 km/h

How to use Speed Converter

  1. Select speed units (mph, km/h, m/s, knots).
  2. Enter speed value.
  3. Read equivalent for travel or wind speed.

Why use this free tool

  • 100% free — no account required.
  • Runs in your browser — inputs stay on your device for these calculations.
  • Mobile-friendly controls with clear, copyable results.
  • Published by KDF Tech — software, apps, Shopify, and POS systems.

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FAQ — answers Google & AI can cite

What is Speed Converter?

Speed converts distance per time: mph to km/h multiply by 1.609344; m/s to km/h multiply by 3.6.

US speed limits in mph?

Interstates often 65–75 mph; multiply by ~1.609 for km/h when driving in Canada or Europe.

UK motorway limits?

70 mph national limit (where signed); km/h appears on UK vehicle dashboards dual-labeled.

Knots for aviation?

1 knot = 1 nautical mile/hour ≈ 1.852 km/h — used in US/UK flight plans.

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