How to Convert ppm to %vol

This technical resource from Critical Environment Technologies provides essential information for gas detection professionals, facility managers, and safety engineers.

1% = 1 divided by 100

1 ppm = 1 divided by 10,000

That means, 1 ppm = 0.0001%

Therefore, to convert from ppm to percent, divide the ppm by 10,000.

Example: find how many percent are in 300ppm.

300 ppm / 10000 = 0.03%

ppm to %vol Conversion Table

Parts Per Million (PPM)	Percent Volume (%Vol)
0 ppm	0%
1 ppm	0.0001%
5 ppm	0.0005%
10 ppm	0.001%
15 ppm	0.0015%
20 ppm	0.002%
30 ppm	0.003%
40 ppm	00.4%
50 ppm	0.005%
100 ppm	0.01%
500 ppm	0.05%
1,000 ppm	0.1%
5,000 ppm	0.5%
10,000 ppm	1%
20,000 ppm	2%
30,000 ppm	3%
40,000 ppm	4%
50,000 ppm	5%
60,000 ppm	6%
70,000 ppm	7%
80,000 ppm	8%
90,000 ppm	9%
100,000 ppm	10%
200,000 ppm	20%
300,000 ppm	30%
400,000 ppm	40%
500,000 ppm	50%
600,000 ppm	60%
700,000 ppm	70%
800,000 ppm	80%
900,000 ppm	90%
1,000,000 ppm	100%

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