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Speed converter

mile per second to foot per second

Convert mile per second (mi/s) to foot per second (ft/s). Use an editable speed converter, conversion formula, and reference table.

5,280

1 mi/s = 5,280 ft/s

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Conversion formula

ft/s = mi/s × 5,280

One mile per second equals 5,280 foot per second. Multiply your value in mile per second by this factor to get foot per second. For the reverse conversion, divide by the same factor.

Worked example

To convert 5 mile per second:
5 × 5,280 = 26,400 ft/s

Conversion table

mile per second (mi/s)foot per second (ft/s)
0.0152.8
0.1528
15,280
210,560
526,400
1052,800
25132,000
50264,000
100528,000
10005,280,000

About these measurements

Speed is distance traveled per unit of time.

The base reference used here is the meter per second. One mile per second is 1,609.344 base units; one foot per second is 0.3048 base units.

Important distinctions

Mach is excluded because the speed of sound depends on medium and temperature.

Precision

The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.

Common questions

How do I convert mi/s to ft/s?

Multiply the quantity in mi/s by 5,280. You can also type the value into the converter above.

Can I reverse the conversion?

Yes. Use the swap button or open the foot per second to mile per second converter.

Reference

NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.

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