Kilometres per hour to Miles per hour Converter

How to convert km/h to mph

To convert kilometres per hour to miles per hour, multiply by 0.621371 (or divide by 1.60934). For example, 5 km/h × 0.621371 = 3.10686 mph.

Need it the other way? Convert miles per hour to kilometres per hour.

Kilometres per hour to Miles per hour at a glance

• 1 kilometre per hour = 0.6213712 miles per hour
• 5 kilometres per hour = 3.106856 miles per hour
• 10 kilometres per hour = 6.213712 miles per hour
• 50 kilometres per hour = 31.06856 miles per hour
• 100 kilometres per hour = 62.13712 miles per hour
• 1 mile per hour = 1.609344 kilometres per hour (the reverse)

Worked examples

25 kilometres per hour × 0.6213712 = 15.53428 miles per hour.

250 kilometres per hour × 0.6213712 = 155.3428 miles per hour.

1,500 kilometres per hour × 0.6213712 = 932.0568 miles per hour.

Converting back

To go from miles per hour back to kilometres per hour, divide by 0.6213712 (or multiply by 1.609344). For example, 100 miles per hour ÷ 0.6213712 = 160.9344 kilometres per hour.

Using a rounded factor

For a quick estimate you can use 0.62 in place of 0.6213712. That is accurate to within about 0.2%, which is fine for rough checks but not for exact work.

Km/h to mph chart

More speed conversions

Frequently asked questions