This calculator will instantly convert parts per million (PPM) to a percentage.
How To Convert PPM To Percent
1 ppm is equal to .0001%. That percentage is calculated by dividing 1 by 1 million which equals .000001. This decimal value is converted to a percentage by multiplying by 100.
.000001 X 100 = .0001%
So the formula to convert PPM to percent is to multiply by .0001 or divide by 10000.