How do I convert mph to m/s?

Use the formula shown above or enter a value to see mph converted to m/s instantly.

What is the formula for mph to m/s?

The converter calculates m/s by applying the category-specific conversion factor for Speed.

When should I use mph vs m/s?

mph and m/s are both part of the Speed category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Speed Conversion Summary

Convert mph to m/s

Use the live converter below to translate between Mile per hour (mph) and Meter per second (m/s). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

mph → m/s

Mile per hour

mph

Meter per second

0.447

m/s

Rounded result (4 decimals max)

Formula

1 mph = 0.447 m/s

Conversion sourcesTap or click to view references

The International System of Units (SI) — NIST Special Publication 330
National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

Results update as you type. Swap the direction to convert back from m/s to mph.

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mph to m/s quick table

Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

Mile per hour (mph)	Meter per second (m/s)
0.25 mph	0.1118 m/s
0.5 mph	0.2235 m/s
1 mph	0.447 m/s
2 mph	0.8941 m/s
5 mph	2.2352 m/s
10 mph	4.4704 m/s
25 mph	11.176 m/s
100 mph	44.704 m/s

m/s back to mph

Keep the reciprocal handy when double-checking calculations or undoing a conversion.

Meter per second (m/s)	Mile per hour (mph)
0.25 m/s	0.5592 mph
0.5 m/s	1.1185 mph
1 m/s	2.2369 mph
2 m/s	4.4739 mph
5 m/s	11.1847 mph
10 m/s	22.3694 mph
25 m/s	55.9234 mph
100 m/s	223.6936 mph

Explore more speed conversion summary

mph → km/h

Convert into Kilometer per hour without leaving SwapUnits.

Compare all speed conversion summary

View the full unit roster, charts, and tips for Speed Conversion Summary conversions.

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