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Speed of Sound Calculator

Teplota

Medium

✓Speed

m/s

343.2

km/h

1235.6

mph

767.8

What is Speed of Sound Calculator?

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The speed of sound depends on the medium and temperature. In dry air at 20°C it is approximately 343 m/s. It is much faster in water and steel.

DigiCalcs delivers precision-engineered tools for engineers and STEM professionals.

Vzorec

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f(x)Speed of sound ≈ 331.3 + 0.606 × T(°C) m/s | Dry air at sea level | Faster in denser media (water, steel)

How to Speed of Sound Calculator

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1Speed in air = 331.3 × √(1 + T°C/273.15) m/s
2Increases ~0.6 m/s per °C in air
3In water at 20°C: ~1,482 m/s
4In steel: ~5,960 m/s

Worked Examples

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Example 1

Given:Air temperature 30°C

Výsledok:Speed = 331.3 × √(303.15/273.15) = 349 m/s = 1,256 km/h

Speed of Sound in Different Media

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Medium	m/s	km/h
Air at 0°C	331	1,192
Air at 20°C	343	1,235
Air at 40°C	355	1,278
Seawater	~1,530	5,508
Steel	5,960	21,456

Frequently Asked Questions

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What is Speed Of Sound?

The speed of sound depends on the medium and temperature. In dry air at 20°C it is approximately 343 m/s

How accurate is the Speed Of Sound calculator?

The calculator uses the standard published formula for speed of sound. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Speed Of Sound calculator use?

This calculator works with inches, Celsius. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Speed Of Sound calculator use?

The core formula is: Speed in air = 331.3 × √(1 + T°C/273.15) m/s. Each step in the calculation is shown so you can verify the result manually.

References

›Speed of sound — HyperPhysics

Accuracy-checked

Reviewed October 2026

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