This is a useful link about getting quick information about
Low & High Tolerance Value of high precision resistors.
http://www.learningaboutelectronics.com/Articles/Tolerance-calculator.phpNow at winter time I do some comparisons between my dedicated resistance meter and my benchtop multimeter, so to get stats regarding measuring performance at 15C room temperature.
And the specific web calculator it is a time saver, with six digits resolution !