About CALCSLIP
Free calculators that show their working, for anyone who wants to check the answer.
What it is
CALCSLIP is a collection of calculators for money, dates, math and everyday conversions. Each one answers as you type, prints the formula with your own numbers in it, and says what it assumes. There is nothing to sign up for.
Who runs it
CALCSLIP is built and maintained by an independent developer. Formulas are written from standard references and checked with automated tests before every release; the methodology page explains how.
How it is paid for
The site is free and supported by display advertising. Ads are never placed between a calculator's inputs and its result, and no advertiser has any say in how a calculation works.
Contact
Found a mistake, or want a calculator that is not here? Email [email protected]. Please include the link from the Share button so the exact calculation can be reproduced.