Speed Converter Calculator

Work out speed converter instantly with clear inputs, formula shown and shareable results.

About Speed Converter Calculator

Each speed unit is defined as a multiple of the metre per second, so the conversion runs in two steps: multiply by the source unit's factor to reach metre per second, then divide by the target unit's factor. One factor per unit covers every pair in the list.

Formulas

Two-step conversion

result = value × factor(from) ÷ factor(to)

Base value

base (metre per second) = value × factor(from)

Worked example

With the default values below, Speed Converter Calculator returns Converted Value of 62.137119. Change any input above and every figure here is recalculated in your browser.

Inputs used

Value: 100
From unitone of Metres per second (m/s), Kilometres per hour (km/h), Miles per hour (mph), Knot (nautical mile/h), Feet per second (ft/s): Kilometres per hour (km/h)
To unitone of Metres per second (m/s), Kilometres per hour (km/h), Miles per hour (mph), Knot (nautical mile/h), Feet per second (ft/s): Miles per hour (mph)

Results

Converted Value: 62.137119
Result Unit: Miles per hour (mph)
Value in metre per second (base): 27.777778
Multiplier Applied: 0.62137119

Step by step

1Values used
2Two-step conversion
3Base value
4Converted Value= 62.137119
5Result Unit= Miles per hour (mph)
6Value in metre per second (base)= 27.777778
7Multiplier Applied= 0.62137119

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 8 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why route through metre per second?

With 5 units, direct pairs would mean 20 factors to maintain. Going via metre per second needs one factor per unit and gives the same answer.

Does the dropdown order matter?

Yes. The first is the unit your figure is already in; the second is what you want it in. Swapping them inverts the result.