About CalcJournal

CalcJournal is a small, independent collection of calculators. Each one is built to give you a real answer from a real calculation, not a rough guess from a table.

Where a topic needs more explaining than a number can give, we write a plain-English guide to go with it. We link to our sources and say when something is an estimate rather than an exact figure.

The site is run by a small team and is supported by advertising, which keeps every calculator free to use.