Skip to content
Unitglide

Kilometres per hour to Miles per hour

1 kilometre per hour = 0.62137 miles per hour · 1 mph = 1.6093 km/h

1 kilometre per hour = 0.62137 miles per hour

How it’s calculated

mph = km/h ÷ 1.609344

  • Divide the value in kilometres per hour by 1.609344.
  • Equivalently, multiply by 0.6213711922.
  • 1 km/h = 0.6213711922 mph · 1 mph = 1.609344 km/h
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 km/h = 0.277777777777778 m/s and 1 mph = 0.44704 m/s, so 1 mph = 1.609344 km/h. Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units); NIST SP 811 / Handbook 44.

  2. Multiply by the factor written as a fraction

    Put km/h in the denominator so it cancels, leaving mph.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 0.62137 mph

1 km/h in other units

Batch convert km/h → mph
Results
  1. 1 km/h = 0.62137 mph
  2. 5 km/h = 3.1069 mph
  3. 10 km/h = 6.2137 mph
  4. 25 km/h = 15.534 mph

Permanent link to this conversion

Advertisement
Ad space reserved · 728×90 / 320×100

Quick examples

  • 1 kilometre per hour = 0.62137 miles per hour
  • 5 kilometres per hour = 3.1069 miles per hour
  • 10 kilometres per hour = 6.2137 miles per hour
  • 25 kilometres per hour = 15.534 miles per hour
  • 100 kilometres per hour = 62.137 miles per hour

About these units

Kilometre per hour (km/h)

metric (non-SI)

1 km/h = 0.2777777778 m/s

Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)

Mile per hour (mph)

US & imperial (identical)

Exactly 0.447 04 m/s.

1 mph = 0.44704 m/s

Source: NIST SP 811 / Handbook 44

Kilometres per hour to miles per hour conversion table

kilometre per hour (km/h) to mile per hour (mph)
Kilometres per hour (km/h)Miles per hour (mph)
0.1 km/h0.062137 mph
0.5 km/h0.31069 mph
1 km/h0.62137 mph
2 km/h1.2427 mph
3 km/h1.8641 mph
4 km/h2.4855 mph
5 km/h3.1069 mph
6 km/h3.7282 mph
7 km/h4.3496 mph
8 km/h4.971 mph
9 km/h5.5923 mph
10 km/h6.2137 mph
15 km/h9.3206 mph
20 km/h12.427 mph
25 km/h15.534 mph
30 km/h18.641 mph
40 km/h24.855 mph
50 km/h31.069 mph
75 km/h46.603 mph
100 km/h62.137 mph
250 km/h155.34 mph
500 km/h310.69 mph
1,000 km/h621.37 mph

Related conversions

Frequently asked questions

How do I convert kilometres per hour to miles per hour?

Use mph = km/h ÷ 1.609344. Divide the value in kilometres per hour by 1.609344.

How many miles per hour are in 1 kilometre per hour?

1 kilometre per hour (km/h) equals 0.62137 miles per hour (mph); more precisely 0.6213711922.

How many kilometres per hour are in 1 mile per hour?

1 mile per hour (mph) equals 1.6093 kilometres per hour (km/h); more precisely 1.609344.

What is 10 km/h in mph?

10 kilometres per hour = 6.2137 miles per hour.

What is a mile per hour?

Exactly 0.447 04 m/s.

Formula: mph = km/h ÷ 1.609344. Factors last reviewed 2026-10-27.