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Relative and Percentage Error Calculator — result sheet
Calculate signed relative error and absolute percentage error from an actual value and a nonzero reference.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Relative error=(actual−reference)/reference; absolute percentage error=|relative error|×100.
Signed direction and absolute percentage magnitude are shown separately so over- and under-estimation remain distinguishable.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Measured or estimated value — minimum -1000000000; maximum 1000000000
- Reference value — minimum -1000000000; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Measured or estimated value | 98 |
| Reference value | 100 |
Relative error =−0.02; absolute percentage error =2%.
Assumptions and limits
- The reference value is nonzero and both values use compatible units.
- The reference is treated as the comparison baseline.
- Uncertainty coverage, systematic bias, tolerance policy, and acceptance decisions are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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