Tools tagged #reference
Every ecech. tool tagged reference: 7 free calculators and utilities across Date, Time & Timezone, Math & Statistics. No signup, runs in your browser.
CIDR to Subnet Mask
Every prefix from /0 to /32 with its netmask, wildcard, host count and binary. Handles /31 and /32, which the usual formula gets wrong.
Network🕑Date Format Tester
In Unicode patterns YYYY is the week-numbering year. 31 December 2019 renders as 2020, which is where the New Year date bugs come from.
Time🕑Epoch Rollover
It does not crash. It wraps to minus two billion and reports a date 137 years in the past, which is far harder to notice.
Time📊Fraction Calc
Fractions are exact and decimals are not. This keeps integers all the way through and only rounds when it prints.
Math📏Paper Sizes
Every A size has the same shape, so halving one gives the next. Letter does not share that shape, which is why no single scale fits both.
Converters📊Percentage Calc
Three different questions share the word percentage, and a fall is never undone by a rise of the same size.
Math📏Unit Converter
Length, mass, volume, area, speed and temperature — with the units that share a name listed separately instead of silently picked for you.
Converters