Percentage Error Calculator
This calculator helps you compute the percentage error between an experimental (measured) value and a theoretical (true or accepted) value. It’s essential for students, scientists, and engineers who need to quantify accuracy and assess how close a result is to the expected value.
Calculate Error Percentage from Measured and True Values
Percentage Error Formula
$$\text{Percentage Error} = \left( \frac{|\text{Measured} – \text{True}|}{|\text{True}|} \right) \times 100\%
$$
Explanation:
Subtract the true value from the measured value, take the absolute difference, divide by the true value, and multiply by 100 to express the error as a percentage.
Percentage Error – Calculation Example
– Measured value: 9.2
– True value: 10
- |9.2 – 10| = 0.8
- 0.8 / 10 = 0.08
- 0.08 × 100 = 8%
Result: Percentage error = 8%
Percentage error is a fundamental concept in physics, chemistry, engineering, and math labs. It provides a standardized way to express how accurate an experiment or measurement is. This calculator ensures quick and reliable results for analysis, reports, or learning purposes.