Speed Calculator

Light travels at 299,792 km/s - it could circle Earth 7.5 times in one second

Cheetahs reach 120 km/h in 3 seconds, the fastest acceleration of any land animal

The SR-71 Blackbird flew at Mach 3.3 (3,540 km/h) - still the fastest air-breathing jet

Japan's L0 maglev train hit 603 km/h - Tokyo to Osaka in under an hour

Usain Bolt's top speed was 44.72 km/h during his 100m world record

Sound travels 4.3x faster in water (1,480 m/s) than in air (343 m/s)

Voyager 1 travels at 61,000 km/h - it would take 73,000 years to reach the nearest star

A bullet from an AK-47 travels at 715 m/s - over twice the speed of sound