To calculate absolute uncertainty for an instrument with a known, constant resolution (e.g., a ruler with millimeter markings), simply use half the smallest division on the instrument:

In the following article, you will learn what absolute uncertainty is, the absolute uncertainty formula, and how to find absolute uncertainty from relative uncertainty.

Absolute uncertainty can be found by multiplying the value by its relative or percentage uncertainty. Absolute uncertainty = relative uncertainty x value.

Nov 15, 2025 · The fundamental formula for absolute uncertainty is: Absolute uncertainty = ± (half of the smallest division of the instrument) For example: A digital balance reading to 0.01 g has …

Jun 28, 2023 · Calculate Absolute Uncertainty from Relative Uncertainty (Percentage) To convert relative uncertainty in percentage to absolute uncertainty, use the formula and instructions …

Absolute uncertainty is a measure of the uncertainty in a measurement, expressed in the same units as the measurement itself. It represents the range within which the true value is expected …

Nov 1, 2025 · Learn how to calculate absolute uncertainty easily with this clear, step-by-step guide. Perfect for students and lab enthusiasts—includes formulas, examples, and tips to …