Accuracy Calculator
Accuracy, error and percent error from measured versus true values, or from correct predictions.
Compare Your Options And Get Clear Answers
Accuracy, error and percent error from measured versus true values, or from correct predictions.
Accuracy Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Accuracy Quick Guide
Typical values for reference.
| True | Measured | True | Accuracy |
|---|---|---|---|
| 50 | 49 | 50 | 98.00% |
| 50 | 48.5 | 50 | 97.00% |
| 100 | 96 | 100 | 96.00% |
| 10 | 10.2 | 10 | 98.00% |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Accuracy Calculator FAQ
Answers to common questions about this calculator.
The size of the error relative to the true value.
Accuracy is closeness to truth; precision is repeatability.
Percent error =
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.