About These Unit Converters

This site is a set of single-purpose converters between metric and imperial units, plus a Roman numeral translator. Each one lives on its own page, does one conversion, and states the exact formula it uses next to a table of common values. If you want to check a result by hand, everything you need is in front of you.

How the Pages Work

Results round to four decimal places at most, with trailing zeros stripped. The height page is the one exception: it rounds inches to a single decimal, because that's how people actually state height. Where a unit has regional variants, the page says which one it uses. The oz to ml converter, for instance, works in US fluid ounces and tells you how the imperial ounce differs.

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