Survey Tolerance Checker
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserIntermediate
Enter Values
Enter your values and press Calculate to see results.
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.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.