Is speed the same as velocity?

Speed is a scalar magnitude. Velocity also includes direction. This calculator reports average speed magnitude.

Can I solve for distance or time?

Yes. Choose the quantity to solve for and enter the other two values.

When should I use the SUVAT calculator instead?

Use SUVAT when acceleration is constant and initial velocity, final velocity, displacement or time are part of the problem.

Speed Calculator

Calculate speed, distance or time from two known values with metric, imperial and nautical units.

Solve for

SpeedDistanceTime

Distance

Speedresult

Time

This calculation assumes constant speed or average speed over the whole interval. If the speed changed, split the trip into segments or use an acceleration calculator.

Speed presets

Calculate speed, distance or time

English SERPs for speed calculators expect a direct three-variable tool: distance, time and average speed. This page follows that intent and keeps unit conversion visible for physics homework, travel estimates and quick checks.

v = \frac{d}{t}

v is average speed, d is distance and t is elapsed time.

d = v \cdot t

d is the distance covered at constant or average speed.

t = \frac{d}{v}

t is the travel time for a known distance and speed.

Average speed limits

Use average speed when the object or vehicle did not move at a constant speed.
For changing velocity over time, use the acceleration or SUVAT calculator.
Supported units include mph, km/h,,, knots, miles, kilometers, feet, yards, seconds, minutes, hours and days.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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