In many circumstances, a single measurement of a quantity is often sufficient for the purposes of the measurement being taken. But if you only take one measurement, how can you estimate the uncertainty in that measurement? Estimating the uncertainty in a single measurement requires judgement on the part of the experimenter. The uncertainty of a single measurement is limited by the precision and accuracy of the measuring instrument, along with any other factors that might affect the ability of the experimenter to make the measurement and it is up to the experimenter to estimate the uncertainty
What is Measurement Uncertainty?
“A parameter, associated with the result of a measurement, that characterises the
dispersion of the values that could reasonably be attributed to the measurand”
This Excel contains 2 method of calculation :
When you Enter Your Data . It will automatically populate the Calculator tab and calculate the uncertainty. Some fields have drop-down lists.