ft/s to m/s: 1 ft/s = 0.3048 m/s (exact)

The formula

m/s = ft/s × 0.3048

Where the factor comes from — each unit by its definition, then its size in SI:

1 ft/s = ft / s = 0.3048 m/s
1 m/s is the SI unit of speed.

Dividing the two SI sizes gives the factor: 0.3048, exact — every step above is a definition, not a measurement. The reverse factor is 3.28083989501.

Kinematics and energy formulas need speed in metres per second. Road speeds come in km/h or mph, so convert before you square anything: kinetic energy goes with v², so a unit slip is squared too.

Worked examples

Motorway driving (100 km/h): 91.1344 ft/s = 27.7778 m/s — 91.1344 × 0.3048 = 27.7778
A brisk walk (5 km/h): 4.55672 ft/s = 1.38889 m/s — 4.55672 × 0.3048 = 1.38889
US highway driving (60 mph): 88 ft/s = 26.8224 m/s — 88 × 0.3048 = 26.8224
A hard-thrown ball: 98.4252 ft/s = 30 m/s — 98.4252 × 0.3048 = 30

Frequently asked questions

How many metres per second is 1 ft/s?

1 ft/s = 0.3048 m/s, exactly, from the unit definitions.

How do I convert metres per second back to feet per second?

Divide by 0.3048 — or multiply by 3.28083989501: 1 m/s = 3.28083989501 ft/s.

ft/s to m/s conversion table

Feet per second (ft/s)	Metres per second (m/s)
1	0.3048
2	0.6096
3	0.9144
4	1.2192
5	1.524
6	1.8288
7	2.1336
8	2.4384
9	2.7432
10	3.048
15	4.572
20	6.096
25	7.62
30	9.144
40	12.192
50	15.24
60	18.288
70	21.336
75	22.86
80	24.384
90	27.432
100	30.48
150	45.72
200	60.96
250	76.2
500	152.4
1,000	304.8

Definitions: International yard and pound agreement (1959): 1 yd = 0.9144 m, 1 lb = 0.45359237 kg; adopted in NIST SP 811 B.8 and NIST Handbook 44 Appendix C · BIPM, The International System of Units (SI Brochure), 9th edition (2019), Tables 2, 4 and 8 — https://www.bipm.org/en/publications/si-brochure. Machine value of the factor: 0.3048.