Air - Speed of Sound vs. Temperature

Speed of sound in air at standard atmospheric pressure with temperatures ranging -40 to 1000^oC (-40 to 1500^oF) - Imperial and SI Units.

Temperature - t - (^oF)	Speed of Sound - c - (ft/s)
-40	1004
-20	1028
0	1051
10	1062
20	1074
30	1085
40	1096
50	1106
60	1117
70	1128
80	1138
90	1149
100	1159
120	1180
140	1200
160	1220
180	1239
200	1258
300	1348
400	1431
500	1509
750	1685
1000	1839
1500	2114

Temperature - t - (^oC)	Speed of Sound - c - (m/s)
-40	306.2
0	331.4
5	334.4
10	337.4
15	340.4
20	343.3
25	346.3
30	349.1
40	354.7
50	360.3
60	365.7
70	371.2
80	376.6
90	381.7
100	386.9
200	434.5
300	476.3
400	514.1
500	548.8
1000	694.8

Speed of Sound in Air and Relative Humidity

For full table - rotate the screen!

Temperature (°C)	Speed of Sound (m/s)
	Relative Humidity (%)
	10	20	30	40	50	60	70	80	90
0	331.5	331.5	331.5	331.6	331.6	331.6	331.7	331.7	331.7
5	334.5	334.6	334.6	334.7	334.7	334.7	334.8	334.8	334.9
10	337.5	337.6	337.7	337.7	337.8	337.9	337.9	338.0	338.0
15	340.5	340.6	340.7	340.8	340.9	341.0	341.1	341.2	341.2
20	343.5	343.6	343.7	343.9	344.0	344.1	344.2	344.4	344.5
25	346.4	346.6	346.8	347.0	347.1	347.3	347.5	347.6	347.8
30	349.4	349.6	349.9	350.1	350.3	350.5	350.8	351.0	351.2

Calculate the Speed of Sound in Air vs. Temperature

The velocity of sound can be calculated in metric units as

v_ms = 20.05 (273.16 + t_C)^1/2 (1)

where

v_ms = velocity of sound (m/s)

t_C = temperature (°C)

Velocity of sound in Imperial units:

v_fts = 49.03 (459.7 + t_F)^1/2 (2)

where

v_fts = velocity of sound (ft/s)

t_F = temperature (°F)

Note that speed is a scalar quantity. Velocity is vector quantity with direction.

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