Enter the relative uncertainty and the measured value of a data point into the calculator to determine the absolute uncertainty.
Absolute Uncertainty Formula
The following formula is used to calculate an absolute uncertainty.
A = R /100 * MV
- Where A is the absolute uncertainty
- R is the relative uncertainty
- MV is the measured value
Absolute Uncertainty Definition
An absolute uncertainty is defined as the total uncertainty of a set of data based on the relative uncertainty and a measured value.
Absolute Uncertainty Example
How to calculate absolute uncertainty?
- First, determine the relative uncertainty.
Calculate the relative uncertainty.
- Next, determine the measured value.
Calculate the measure or reported value.
- Finally, calculate the absolute uncertainty.
Calculate the absolute uncertainty using the formula above.
The absolute uncertainty is a value that provides a range of possible values when combined with a measured or reported value. In other words, if the measured value is 2 and the absolute uncertainty is .5, then the range of possible values is 1.5-2.5 or 2+/- .5.
Relative uncertainty is the ratio of the absolute uncertainty to the measured value.