Percent Error Calculator

Percent Error Formula

Percent error is a measure of how inaccurate a measurement is, standardized to how large the measurement is. It helps in determining the precision of calculations and data in scientific experiments.

The Formula

$\% Error = \left| \frac{Experimental - Theoretical}{Theoretical} \right| \times 100\%$

Where:

• Experimental Value: The value determined by measurement or experiment.
• Theoretical Value: The accepted or known value (the "correct" answer).
• Absolute Value ($|...|$): Ensures the result is always positive.

Interpretation

• A low percent error indicates that the experimental result is close to the accepted value (high accuracy).
• A high percent error indicates a significant discrepancy.