Feet per Second Calculator
Feet per second calculator works out Converted value and Unrounded result from Value, From unit and Significant figures. The default figures on this page give converted value of 1.466667; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
2 steps
- 1 mph = 1.46666666667 ft/s
- 1 x 1.46666666667 = 1.466666667 ft/s
Its 12 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
2 sources
What the feet per second calculator calculates
Converts a quantity between any two units of the same physical family using exact SI-derived factors.
How to use this feet per second calculator
Enter Value, From unit and Significant figures. Converted value updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Converted value, Unrounded result and Conversion.
The method follows NIST Special Publication 811, Guide for the Use of the International System of Units and BIPM, The International System of Units (SI Brochure).
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How to calculate ft per second?
Converts a quantity between any two units of the same physical family using exact SI-derived factors. Open “How this is worked out” beside the result to see each step for your own figures.
What is 1000 ft per second in mph?
Converts a quantity between any two units of the same physical family using exact SI-derived factors. On this page it is computed from Value, From unit and Significant figures and shown as Converted value, Unrounded result and Conversion.
How fast is 20 ft per second in mph?
It needs Value, From unit and Significant figures. Nothing else is required, and the figures stay in your browser.
How fast is 1 ft a second?
The result gives Converted value, Unrounded result, Conversion, Reading, Multiply by and Reverse conversion, each labelled with its unit so the figure can be read on its own.
How fast is 100 feet a second?
The page opens with worked default figures: converted value of 1.466667. Replace them with your own and every figure updates as you type.
What information do I need for the feet per second calculator?
You need Value, From unit and Significant figures. The page opens with default figures that give converted value of 1.466667, so you can see the scale before entering your own.