SPEED UNIT WORKSPACE

Speed Converter

Convert road, marine, scientific, and engineering speed units without mixing distance or time bases.

Reviewed reference factorsValues stay in this browser tabNon-negative speed magnitudes; direction and acceleration are outside scope.

Conversion input

Convert a speed magnitude

Enter a speed and select its current and required units. Review metres per second, kilometres per hour, miles per hour, knots, and more together.

Find a unit4 / 4

Filter by unit name, symbol, or code. Your current selections remain available.

Known value0 / 80

Enter a speed magnitude as a number only. Direction, velocity components, elapsed time, and acceleration are not part of this conversion.

Convert from

Choose the unit attached to the value you entered.

Convert to

Choose the unit required for your report, estimate, or comparison.

Displayed precision

Choose the maximum decimal places shown. This does not increase source accuracy.

Conversion runs locally after the active reference catalogue loads.

Conversion result

Your checked conversion appears here

Load the example or enter a speed to see the selected answer and all available equivalents.

What this tool delivers

Distance-per-time conversion made explicit

Every supported speed unit is related to metres per second through a reviewed factor.

What it converts

Converts scalar speed among metric, customary, and nautical distance-per-time units in the API catalogue.

What you provide

One non-negative speed, a source unit, a destination unit, and display precision suitable for the decision.

What you receive

A highlighted speed, the base-unit path, a full equivalent table, and a formula-safe CSV.

Calculation method

How the speed conversion is calculated

The source rate is converted to metres per second, then divided by the destination rate's factor. A knot is treated as one nautical mile per hour.

Review the NIST speed conversion factors

Quick answers

Speed Converter questions

Is a knot the same as a mile per hour?

No. A knot is one nautical mile per hour and uses a different distance from a statute mile.

Can the tool calculate arrival time?

No. It changes speed units only; route distance and operating conditions need a separate calculation.

Why are negative speeds blocked?

This workspace represents scalar speed. Signed direction belongs to a velocity calculation.