Tolerance Calculator

This tolerance calculator calculates the tolerance of an electronic component either based on its nominal value and either its tolerance percentage value or its parts per million (ppm) value.

The tolerance of an electronic component such as a resistor or capacitor can be specified either as a percentage value or as a parts per million value.

The tolerance percentage is a specification which shows how much an electronic component can deviate, in percentage, from its stated nominal value. For example, if a 1KΩ resistor has a tolerance of 20%, this means it can deviate 20% from its 1KΩ of resistance. 20% of 1KΩ is 200. So the resistance can fall between 800Ω and 1.2KΩ.

The other way of specifying the tolerance of an electronic component is by its parts per million specification. Parts per million is a way of specifying a component's tolerance by how much it can vary per million units. So if a resistor has a parts per million value of 50,000, it can vary by 50,000Ω per 1 million ohms of resistance. So a 1MΩ resistor can vary by 50,000Ω if it has a ppm of 50,000. This means its resistance can be between 950,000Ω and 1,050,000Ω.

To use this calculator, a user just enters the component's nominal value and either the tolerance percentage value or ppm value. The tolerance will automatically be computed, along with the range of the low tolerance value and the high tolerance value.

The unit computed will be the unit you entered into the input field. For example, if you're calculating resistance and you enter in unit ohms (Ω), this is the value which will be computed in the resultant fields.

Related Resources

PPM to Percent Calculator

Parts per Million (PPM)- Explained

Resistor Tolerance