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Speed

Just how fast is 300 metres per second?

Air & orbit

300 m/s

Scale

DISTANCE IN ONE SECOND

300 metres per second

The quantity is exact as entered.

1,080 km/hSpeed
0

300 m in 1 s

Sound in air

Sound in air is the propagation of pressure waves through the atmosphere, which can be heard by humans and animals.

1,235 km/hSpeed
0

343 m in 1 s

Each track shows distance covered in the same second. The small illustrations identify the movers; their sizes are schematic.

A little perspective

The speed of sound in air is about 1.14 times 300 metres per second.

Measurements, assumptions & sources +

300 metres per second

Speed: 1,080 km/h; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Sound in air

Speed: 1,235 km/h; approximate.

Approximately 343 m/s in dry air at 20 °C. Mach numbers use this stated local sound speed.

NASA Glenn — Speed of sound

The marked speed is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 300 metres per second with the speed of sound in air. The notes below explain how each value was chosen.

300 metres per second

1,080 km/h

Speed · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Sound in air

1,235 km/h

Speed · approximate

Approximately 343 m/s in dry air at 20 °C. Mach numbers use this stated local sound speed.

Comparing
Speed ↔ Speed
Relative size
The speed of sound in air is about 1.14 times 300 metres per second. The speed of sound in air is approximately 14.3% greater than 300 metres per second.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The speed of sound in air: This is an estimate; check the notes for its rounding and uncertainty.

Speed is distance per unit time; it does not specify the total distance travelled.

1,080 km/hkilometres per hour
671.08 mphmiles per hour
Mach 0.87464Mach
0.00010007% of c (1.0007 × 10⁻⁶c)speed of light

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