mph to km/h Converter

About the mph to km/h Converter

The Conversion Formula

1 mph = 1.60934 km/h. To convert miles per hour to kilometres per hour, multiply by 1.60934.

Common Speed Conversions

• 20 mph = 32.2 km/h — typical urban limit in mph countries
• 30 mph = 48.3 km/h
• 60 mph = 96.6 km/h — single carriageway limit in UK
• 70 mph = 112.7 km/h — UK motorway limit
• 100 mph = 160.9 km/h

When This Is Needed

Useful when driving in Europe with a UK-spec car, planning cycling routes, or reading US speed data in a metric context.

Common Use Cases

• Converting UK speed limits for European driving
• Comparing race or vehicle speeds in metric
• Cycling or running pace conversions
• Understanding speed data from UK sources in metric format