This produces a speed at the equator of about 1,037 mph (1,670 km/h). You won't be moving quite as fast at other latitudes, however. If we move halfway up the globe to 45 degrees in latitude ...

The table below shows some common conversions. Unit Conversion Example mph to km/h 1 mile = 1.6 km. Multiply by 1.6 to change mph into km/h. A car travels at 30 mph. In kilometres per hour this is ...