Velocity Calculator

Calculate velocity, distance, or time from the other two values using v = d / t. Supports m/s, km/h, and mph.

Enter any two of distance, time, or velocity and leave the unknown blank. The calculator will solve for the missing value using v = d / t.

About this Calculator

Calculate velocity, distance, or time from the other two values using v = d / t. Supports m/s, km/h, and mph.

Formula & Calculations

Formula

v = d / t, d = v × t, t = d / v

Where:

v=Velocity — rate of change of position
d=Distance — length of path traveled
t=Time — duration of travel

Assumptions

Motion is assumed to be at constant velocity (no acceleration).
All three values must be in consistent units.
Provide any two values to solve for the third.

Calculation Examples

Example 1

Inputs:Distance = 100 m, Time = 10 s

Result:Velocity = 10 m/s

v = d / t = 100 / 10 = 10 m/s.

Example 2

Inputs:Velocity = 60 km/h, Time = 2 h

Result:Distance = 120 km

d = v × t = 60 × 2 = 120 km.

Example 3

Inputs:Distance = 300 mi, Velocity = 75 mph

Result:Time = 4 hours

t = d / v = 300 / 75 = 4 hours.

Frequently Asked Questions

What is the difference between speed and velocity?

Speed is a scalar (magnitude only), while velocity is a vector (magnitude and direction). However, in most everyday calculations like this one, they are used interchangeably.

Can I mix units?

The calculator allows selecting different units for each input and auto-converts. For example, you can enter distance in km, time in hours, and get velocity in mph.