Percent to PPM Calculator

Resistor Tolerance- parts per million (ppm)



This Percent to PPM Calculator calculates the parts per million value of an item from the percent value given.

For example, if a resistor has a ppm percentage of 10%, this numerical value of 10% represents 100,000 ppm.

0.0001% represents 1 unit out of 1,000,000 (one million) units.


1%= 0.01= 0.01 * 1,000,000= 10,000ppm

So if a resistor has a ppm percentage of 1%, this means that it can vary by 10,000 ppm per every million ohms of resistance. Therefore, a 10MΩ resistor with a ppm percentage of 1% can vary by 100,000Ω.

To use this calculator, a user just has to enter the ppm percent value and click the 'Calculate' button, and the resultant parts per million (ppm) value will automatically be computed.

The resultant ppm value represents the component's tolerance. It represents how much, in parts per million, an electronic component may vary from its nominal value, with the given percent value.

So if a resistor has a percent ppm of 20%, this value in ppm is 200,000. If the resistor's nominal value is 1MΩ, it can vary by 200,000 from this nominal value. This means that the resistor can have a resistance as low as 800,000Ω or as high as 1,200,000Ω or be somewhere in between.

Example Calculations

How much is 5% in parts per million (ppm)?


5%= 0.05 * 1,000,000= 50,000ppm

How much is 15% in parts per million (ppm)?


15%= .15 * 1,000,000= 150,000ppm

Related Resources

PPM to Percent Calculator
Parts per Million (PPM)- Explained

Resistor Tolerance

Significant Figures (Sig Fig) Calculator