Enter the exact or theoretical mass and the measured mass into the calculator to determine the mass accuracy.

Mass Accuracy Formula

The following formula is used to calculate a mass accuracy.

A = 100 - | mm - em | / em * 100
  • Where A is the mass accuracy (%)
  • mm is the measured mass
  • em is the exact mass

Mass Accuracy Definition

Mass accuracy is defined as the closeness or proximity of measurement of mass to the exact or theoretical mass of an object or material in question.

How to calculate mass accuracy in PPM?

To calculate mass accuracy in ppm, convert each of the measured masses to PPM using this calculator. Then return and use the formula above to calculate the mass accuracy.

What is mass error?

Mass error, or error mass, is a measure of the total percentage difference in a measured mass from the expected or theoretical mass that one should find.

Mass Accuracy Example

How to calculate mass accuracy?

  1. First, determine the measured mass.

    Determine the value of the mass when measured.

  2. Next, calculate the theoretical mass.

    Calculate the theoretical mass of the substance.

  3. Finally, calculate the mass accuracy.

    Calculate the mass accuracy using the formula above.


How does mass accuracy impact scientific measurements?
Mass accuracy is crucial in scientific measurements as it ensures the reliability and validity of experimental results. High mass accuracy reduces the margin of error, allowing for more precise identification and quantification of compounds in fields such as analytical chemistry and pharmacology.

Why is it important to calculate mass accuracy in PPM?
Calculating mass accuracy in parts per million (PPM) is important for applications requiring high precision, such as drug development and environmental monitoring. PPM calculations help in detecting very low concentrations of substances, ensuring safety and compliance with regulatory standards.

Can mass accuracy vary between different instruments?
Yes, mass accuracy can vary significantly between different instruments due to factors such as calibration, resolution, and the physical condition of the instrument. Regular calibration and maintenance are essential to ensure consistent and accurate mass measurements across different devices.

mass accuracy calculator
mass accuracy formula