Speed Calculator
Please provide any two values in the fields below to calculate the third value in the speed distance time equation:
speed = distance⁄time
Speed Converter
The following converter converts between common units of speed.
About Speed Calculations
Speed is the rate at which an object covers distance. The fundamental relationship between speed, distance, and time is:
Speed Formula:
speed = distance / time
Distance Formula:
distance = speed × time
Time Formula:
time = distance / speed
Common Speed References:
- • Walking speed: 3-4 mph (5-6 km/h)
- • Running speed: 6-10 mph (10-16 km/h)
- • Highway driving: 60-70 mph (100-110 km/h)
- • Commercial jet: 500-600 mph (800-965 km/h)
- • Speed of sound: 767 mph (1,235 km/h) at sea level
- • Speed of light: 186,282 miles/second (299,792 km/s)