Miles per hour to Kilometres per hour Converter

How to convert mph to km/h

To convert miles per hour to kilometres per hour, multiply by 1.60934. For example, 5 mph × 1.60934 = 8.04672 km/h.

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

Miles per hour to Kilometres per hour at a glance

• 1 mile per hour = 1.609344 kilometres per hour
• 5 miles per hour = 8.04672 kilometres per hour
• 10 miles per hour = 16.09344 kilometres per hour
• 50 miles per hour = 80.4672 kilometres per hour
• 100 miles per hour = 160.9344 kilometres per hour
• 1 kilometre per hour = 0.6213712 miles per hour (the reverse)

Worked examples

25 miles per hour × 1.609344 = 40.2336 kilometres per hour.

250 miles per hour × 1.609344 = 402.336 kilometres per hour.

1,500 miles per hour × 1.609344 = 2,414.016 kilometres per hour.

Converting back

To go from kilometres per hour back to miles per hour, divide by 1.609344 (or multiply by 0.6213712). For example, 100 kilometres per hour ÷ 1.609344 = 62.13712 miles per hour.

Using a rounded factor

For a quick estimate you can use 1.6 in place of 1.609344. That is accurate to within about 0.6%, which is fine for rough checks but not for exact work.

Mph to km/h chart

More speed conversions

Frequently asked questions