Quick guide
How to use this calculator
- Choose the comparison, calibration, scaling, resolution, or uncertainty model that matches the measurement record you actually have.
- Enter reference values, indications, ranges, specification components, distributions, and units exactly as documented; the calculator exposes the intermediate relationship instead of hiding it.
- Use the companion outputs to reconcile the worksheet, then retain the stated metrology boundary. A numerical result is not a calibration certificate, traceability statement, adjustment instruction, or conformity decision.
Calculation method
How the instrument accuracy and error-band calculator works
Translate a data-sheet-style accuracy statement into the possible interval around an entered indication while keeping every specification component visible.
Worst-case half-width = |reading| × % of reading + full scale × % of full scale + fixed component + count component × resolution. Error band = reading ± half-width.
Worked example
Instrument Accuracy and Error-Band example
At reading 8.5 on a 10-unit range, ±0.5% of reading + 0.1% of full scale + 2 counts of 0.001 gives a ±0.0545-unit band.
Worst-case half-width = |reading| × % of reading + full scale × % of full scale + fixed component + count component × resolution. Error band = reading ± half-width.
Supported inputs
Precision and limits
Measurement and calibration boundary
Components are added arithmetically as entered worst-case limits, not combined statistically. Confirm whether a real specification uses reading, range, full scale, digits, counts, temperature coefficients, time since calibration, or other conditions; this page does not replace the applicable data sheet or uncertainty analysis.
Precision and reporting
Calculations retain working precision and round only for display. Very small and large nonzero values use scientific notation; displayed digits cannot create accuracy, traceability, or observational certainty absent from the entered data.
Category ownership
This collection owns neutral calibration relationships, instrument scaling, resolution, comparison, and first-order uncertainty worksheets. Statistical inference remains in Statistics; trade-specific inspection and field calibration remain with their professional collections.
Privacy
Entered values and results stay in this browser and are not sent to analytics or third parties.
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