# Velocity calculator: `Tesla Model-S P85D top speed: 250 km/hr`

This calculator helps you estimate the distance travelled after a certain time of constant speed. It also converts to alternative speed units: mile/hr, km/h, m/s, mach, ...

### Speed

##### METRIC (DECIMAL)

Most countries use the Metric System, which uses the measuring units such as meters and grams and adds prefixes like kilo, milli and centi to count orders of magnitude.

• Speed = `69.4 m/s`
• Speed = `6.94 * 101 m/s (scientific)`
• Speed = `69.44 m/s (engineering)`
• ##### IMPERIAL

In the USA and UK, the older Imperial system is used, where things are measured in feet, inches and pounds.

• Speed = `249 984 m/hr`
• Speed = `228 ft/sec`
• ### Time

• Time = `1.00 secs` = `1 sec`
• = `1 sec(s)`
• ### Speed x Time = Distance

• Distance = `69.4 meter`
• = `69.44 * 103 mm`
• = `6.94 * 103 cm`
• = `2.73 * 103 in`
• = `227.82 ft`
• = `75.94 yard`
• = `69.44 m`
• = `69.44 * 10-3 km`
• = `43.15 * 10-3 mile`
• = `37.49 * 10-3 nautical mile`

### References

• Astronomy: light-year - parsec