Should You Round Calculations?

The correct advice is not to round too much at intermediate steps. Usually it makes sense to maintain one or two extra sig figs during a calculation. For example, suppose you're doing a calculation that involves 5 multiplications in a row.

Do you round during calculations?

If a number resulting from a measurement is used in a calculation that involves multiplication or division all significant figures should be carried through the calculation and then the result should be rounded at the end of the calculation to reflect the term used in the calculation with the fewest significant figures ...

What are the rules for rounding off the results of calculations?

In calculations, round up if the first digit to be discarded is greater than 5 and round down if it is below 5. If the first discarded digit is 5, then round up if a nonzero digit follows it, round down if it is followed by a zero.