Survey Tolerance Checker
Compares a measured value against its design value and tolerance, reporting whether it passes or fails.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the measured value and the design/reference value.
- Enter the allowed tolerance (±).
- Press Calculate to see the difference and pass/fail.
How it works
Compares a measured value against a design value and flags whether the difference is within the allowed tolerance.
Worked example
100.045 vs 100.000, ±0.05. Difference +0.045 — within tolerance.
Frequently asked questions
Does it work for any unit?
Yes — use the same unit for the measured value, design value and tolerance.
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Cite this tool
Zerdly. (2026). Survey Tolerance Checker. Retrieved from https://www.zerdly.com/tools/survey-tolerance-checker/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.