Absolute Uncertainty Calculator

Convert a relative uncertainty to an absolute uncertainty.

Absolute uncertainty 1

Formula: absolute = value * relative / 100

Step-by-step with your numbers:
1. Values used:
2. Measured value = 50
3. Relative uncertainty = 2 %
4.
5. Absolute uncertainty = (50 / 100) x 2 = 0.5 x 2 = 1
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Absolute uncertainty is the measurement's value times its relative uncertainty.

The math behind it

absolute uncertainty = value * (relative % / 100). Report it as value plus or minus the absolute uncertainty.

Worked example

50 with 2% uncertainty gives plus or minus 1.0.

FAQ

Absolute vs relative uncertainty?

Absolute has the same units as the value; relative is a percentage.