Next determine the measured value. How to Get Excel to Calculate Uncertainty. The percent uncertainty can be interpreted as describing the uncertainty that would result if the measured value had been100 units.
This percentage uncertainty is often a good estimate of the percentage uncertainty in the final numerical result of the experiment.
When calculating an error or a percentage error work to one significant figure only unless the first figure is a 1 then quote error to two significant figures to avoid a rounding error. In an experiment where more than one physical quantity has been measured spot the quantity with the largest percentage uncertainty. Gravitational field strength g 104 18 Nkg-1. When comparing uncertainties it is important to take the percentage in each.