Convert Foot per Second to Beaufort Scale (ft/s → Bft)

Feet per second is the standard ballistics unit for projectile speeds and American sports analytics.

Foot per Second

Beaufort Scale

0.510355

1 ft/s0.510355 BftNIST · BIPM accuracy

Foot per Second to Beaufort Scale Conversion Table

10 common values

Foot per Second	Beaufort Scale
1 ft/s	0.3048 Bft
5 ft/s	1.524 Bft
10 ft/s	3.048 Bft
25 ft/s	7.62 Bft
50 ft/s	15.24 Bft
100 ft/s	30.48 Bft
150 ft/s	45.72 Bft
200 ft/s	60.96 Bft
300 ft/s	91.44 Bft
500 ft/s	152.4 Bft

How to Convert Foot per Second to Beaufort Scale Manually

Step by Step

Converting feet per second to Beaufort is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1
Take your value in feet per second
Start with the number of feet per second (ft/s) you want to convert.
2
Multiply by 0.3048
The conversion factor from ft/s to Bft is 0.3048. Multiply your value by this number.
3
Read the result in Beaufort
The result is your value in Beaufort (Bft).

Practical Examples

1 ft/s

equals

0.3048 Bft

5 ft/s

equals

1.524 Bft

10 ft/s

equals

3.048 Bft

25 ft/s

equals

7.62 Bft

100 ft/s

equals

30.48 Bft

Formula

Multiply the value in feet per second by 0.3048. For the reverse direction, multiply by 3.28084.

ForwardBft = (m/s ÷ 0.836)^(1/1.5)

Reversem/s = 0.836 × Bft^1.5

Example: 10 ft/s × 0.3048 = 3.048 Bft

Tips

Use these in everyday conversions

1 ft/s = 0.3048 m/s = 1.097 km/h = 0.682 mph.
Multiplying ft/s by 0.682 gives mph.
US engineering often uses ft/s; metric countries use m/s.

Common Mistakes

Avoid these

Confusing ft/s with fps (frames per second in video/gaming).
Mixing ft/s with mph without conversion.
Using ft/s instead of m/s in international scientific contexts.

About Foot per Second and Beaufort Scale

What is the Foot per Second?

Feet per second is the standard ballistics unit for projectile speeds, American sports analytics, and engineering. Bullet velocities are universally given in fps: a .22 LR bullet flies at about 1,200 fps, a 9 mm pistol round at 1,150 fps, and a high-velocity rifle round at 3,000 fps. American football and baseball analytics increasingly use fps for measuring throwing speed, ball exit velocity, and player movement. Engineering disciplines that retain US customary units (HVAC, civil engineering) often specify air or water flow speeds in fps. The unit relates to mph (1.467 fps = 1 mph), m/s (1 fps ≈ 0.305 m/s), and the knot (1 fps ≈ 0.592 kn). Outside ballistics and US sports, m/s and km/h dominate — but in their domains, fps remains entrenched in American technical practice.

US ballistics and firearms
US civil-engineering flow rates
Older US physics and engineering texts

Real-world examples

9mm bullet muzzle velocity: ~1150 ft/s. .308 rifle: ~2700 ft/s. Free fall terminal velocity: ~195 ft/s.

What is the Beaufort Scale?

The Beaufort scale is an empirical wind-force scale ranging from 0 (calm) to 12 (hurricane), developed in 1805 by British Royal Navy Admiral Francis Beaufort. Originally designed for ships at sea, the scale was based on observed effects: 'How much sail can my ship safely carry?' Modern versions describe both observed effects on land and sea and corresponding wind-speed ranges. Force 0 is dead calm (under 1 km/h), Force 6 is 'strong breeze' (39–49 km/h, large branches in motion), Force 10 is a 'whole storm' (89–102 km/h), and Force 12 is hurricane (over 118 km/h). The conversion to numeric speeds follows v = 0.836 × Bft^1.5 m/s. Sailors, meteorologists, and shipping forecasts still use the Beaufort scale because its descriptive nature is intuitive: 'Force 8 gale' immediately conveys conditions to anyone familiar with the scale.