UnitConvConvert
Speed

Convert Beaufort to Mach

1 Bft=0.002939Ma

Use the converter below to change any Beaufort value into Mach instantly — with formula, conversion table, and real-world examples.

0.0024567

Conversion formula

Forward
m/s = 0.836 × Bft^1.5

The Beaufort scale uses a non-linear power relationship with wind speed.

About both units

From

Beaufort Scale

Bft

The Beaufort scale is an empirical wind-force scale from 0 (calm) to 12 (hurricane). Created by Francis Beaufort in 1805, it correlates wind force with observed effects on sea or land. Force 8 (34–40 knots) is a gale; force 12 is above 64 knots.

Real-world: Force 5 (fresh breeze): 17–21 knots, white-caps form. Force 8 (gale): 34–40 knots. Force 12: 64+ knots.
Read full beaufort scale reference →
To

Mach

Ma

Mach is the ratio of an object's speed to the local speed of sound. Mach 1 at sea level in standard conditions = 1225 km/h (340.29 m/s). Supersonic starts at Mach 1; hypersonic at Mach 5. The Concorde cruised at Mach 2.04; the X-15 reached Mach 6.7.

Real-world: Concorde: Mach 2.04. F-16 fighter: Mach 2. SR-71 Blackbird: Mach 3.3. Space re-entry: Mach 25+.
Read full mach reference →

Beaufort Scale to Mach conversion table

Common Beaufort to Mach values for quick reference.

Beaufort Scale (Bft)Mach (Ma)
1 Bft0.002939 Ma
5 Bft0.01469 Ma
10 Bft0.02939 Ma
25 Bft0.07347 Ma
50 Bft0.1469 Ma
100 Bft0.2939 Ma
150 Bft0.4408 Ma
200 Bft0.5877 Ma
300 Bft0.8816 Ma
500 Bft1.46933 Ma

Tips & common mistakes

Quick tips

  • Beaufort is empirical — conversion to m/s uses v = 0.836 × B^1.5.
  • Force 4 (moderate breeze) = 5.5–7.9 m/s.
  • Marine forecasts still use Beaufort alongside knots.

Avoid these

  • Treating Beaufort as a linear scale — it is a power relationship.
  • Converting Beaufort to km/h by multiplying — always use the empirical formula.
  • Using Beaufort for land winds — it was designed for sea conditions.

Frequently asked questions

How many Mach in a beaufort scale?
One beaufort scale equals 0.002939 Mach.
How do I convert Beaufort to Mach?
Multiply the beaufort scale value by 0.002939 to get the equivalent in Mach.
What is 100 Beaufort in Mach?
100 Beaufort equals 0.2939 Mach.
Is a beaufort scale bigger than a mach?
No. 1 beaufort scale equals 0.002939 Mach, so one beaufort scale is smaller.
How to convert Beaufort to Mach without a calculator?
Multiply by 0 for a quick estimate; use a calculator for precise results.

Related speed conversions

📊 See full comparison matrix →

More from Beaufort Scale

Bft → km/h
1 = 3.6 km/h
Bft → m/s
1 = 1 m/s
Bft → mph
1 = 2.23694 mph
Bft → kn
1 = 1.94384 kn
Bft → ft/s
1 = 3.28084 ft/s
Bft → cm/s
1 = 100 cm/s
Bft → yd/min
1 = 65.6168 yd/min
Bft → in/min
1 = 2,364.07 in/min

More to Mach

km/h → Ma
1 = 0.0008163 Ma
m/s → Ma
1 = 0.002939 Ma
mph → Ma
1 = 0.001314 Ma
kn → Ma
1 = 0.001512 Ma
ft/s → Ma
1 = 0.0008957 Ma
cm/s → Ma
1 = 2.9387e-5 Ma
yd/min → Ma
1 = 4.4785e-5 Ma
in/min → Ma
1 = 1.2431e-6 Ma

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