Mach (sea level) (Ma)
The Mach number is speed as a multiple of the local speed of sound, named after the physicist Ernst Mach.
Convert Mach (sea level) to any speed unit
1 Mach (sea level) = 1,225.044 kilometers per hour
Quick facts
- Unit
- Mach (sea level)
- Symbol
- Ma
- Measures
- Velocity / Speed
- System
- Common
- Equals
- 340.29 meters per second
- Definition
- The speed of sound in the International Standard Atmosphere at sea level (340.29 m/s).
- Also written
- Mach number, speed of sound
1 Mach (sea level) in other units
| Kilometers per hour | 1,225.044 km/h |
| Miles per hour | 761.2070508 mph |
| Meters per second | 340.29 m/s |
| Knots | 661.4708423 kn |
| Feet per second | 1,116.437008 ft/s |
| Speed of light | 0.000001135085 c |
| Beaufort force | 54.92397232 Bft |
| Feet per minute | 66,986.22047 ft/min |
What is a Mach (sea level)?
The Mach number is speed as a multiple of the local speed of sound, named after the physicist Ernst Mach. Because sound travels slower in cold air, Mach 1 is about 1,225 km/h at sea level but about 1,062 km/h at 11,000 m. This converter uses the sea-level value of 340.29 m/s.
Where the Mach (sea level) sits among speed units
The Mach (sea level) is number 31 of 41 on our scale of speed units, ordered from smallest to largest.
Mach (sea level) in real life
- Concorde cruised at Mach 2.04
- The SR-71 Blackbird flew above Mach 3
- Airliners cruise at about Mach 0.78–0.85
Top Mach (sea level) conversions
- Mach (sea level) to kilometers per hour
- Mach (sea level) to miles per hour
- Mach (sea level) to meters per second
- Mach (sea level) to knots
- Mach (sea level) to feet per second
- Mach (sea level) to speed of light
- Mach (sea level) to Beaufort force
- Mach (sea level) to feet per minute
- Mach (sea level) to kilometers per second
Common amounts of Mach (sea level)
- 0.25 Ma
- 0.5 Ma
- 0.75 Ma
- 1 Ma
- 1.5 Ma
- 2 Ma
- 2.5 Ma
- 3 Ma
- 4 Ma
- 5 Ma
- 6 Ma
- 7 Ma
- 8 Ma
- 9 Ma
- 10 Ma
- 11 Ma
- 12 Ma
- 13 Ma
- 14 Ma
- 15 Ma
- 16 Ma
- 17 Ma
- 18 Ma
- 19 Ma
- 20 Ma
- 21 Ma
- 22 Ma
- 23 Ma
- 24 Ma
- 25 Ma
- 26 Ma
- 27 Ma
- 28 Ma
- 29 Ma
- 30 Ma
- 31 Ma
- 32 Ma
- 33 Ma
- 34 Ma
- 35 Ma
- 36 Ma
- 37 Ma
- 38 Ma
- 39 Ma
- 40 Ma
- 41 Ma
- 42 Ma
- 43 Ma
- 44 Ma
- 45 Ma
- 46 Ma
- 47 Ma
- 48 Ma
- 49 Ma
- 50 Ma
- 60 Ma
- 70 Ma
- 80 Ma
- 90 Ma
- 100 Ma
- 150 Ma
- 200 Ma
- 250 Ma
- 300 Ma
- 400 Ma
- 500 Ma
- 750 Ma
- 1,000 Ma
Convert Mach (sea level) to all 43 other units
Common
Metric
US & imperial
- Ma to in/s
- Ma to mi/min
- Ma to mi/s
- Ma to furlong per fortnight
- Ma to in/h
- Ma to in/min
- Ma to yd/s
- Ma to Admiralty knot
- Ma to ft/d
- Ma to ft/h
- Ma to in/d
- Ma to yd/min
- Ma to ftm/min
- Ma to yd/h
Physics & astronomy
Wind scales
Everyday comparisons
Convert to Mach (sea level)
- Kilometers per hour to Mach (sea level)
- Miles per hour to Mach (sea level)
- Meters per second to Mach (sea level)
- Knots to Mach (sea level)
- Feet per second to Mach (sea level)
- Speed of light to Mach (sea level)
- Beaufort force to Mach (sea level)
- Feet per minute to Mach (sea level)
- Kilometers per second to Mach (sea level)
Frequently asked questions
What is a Mach (sea level)?
The Mach number is speed as a multiple of the local speed of sound, named after the physicist Ernst Mach.
How is the Mach (sea level) defined?
The speed of sound in the International Standard Atmosphere at sea level (340.29 m/s).
How many kilometers per hour are in a Mach (sea level)?
One Mach (sea level) equals 1,225.044 kilometers per hour.
How many miles per hour are in a Mach (sea level)?
One Mach (sea level) equals 761.2070508 miles per hour.
How many meters per second are in a Mach (sea level)?
One Mach (sea level) equals 340.29 meters per second.