About 247 Calculators

247 Calculators publishes free online calculators with detailed editorial guides. Our calculators are reviewed for accuracy against published formulas and, where applicable, UK government data sources. The site is founded and edited by Jordan Morley, with content produced by an editorial team contributing across qualified-coach, primary-teacher and finance backgrounds.

We aim for every calculator to be world-class: accurate, simple to use, and accompanied by a clear explanation of the underlying methodology.