Clear answers without the clutter
Super Simple Calculator is an independent collection of free browser-based calculators and plain-English guides. It was created to make common calculations easier to understand, whether you are comparing a mortgage, checking VAT, converting a measurement or planning a home project.
The site is operated and developed by Nexar Web Services, a UK web services business. The calculator library has a deliberate UK focus, while also including everyday maths and conversion tools that are useful anywhere.
What makes the calculators useful
- Inputs and results use clear labels rather than unexplained technical terms.
- Calculations run in your browser, so ordinary calculator entries are not submitted to our server.
- Each guide explains the inputs, method, limitations and appropriate use of the result.
- Important financial, tax, property and health results are described as estimates, not professional advice.
How the site is funded
The calculators are free to use. We may fund the cost of creating and maintaining them through advertising, including Google AdSense. Advertising does not change a calculator's formula or result. Any optional advertising or analytics storage is managed through the site's cookie choices where consent is required.
Corrections and suggestions
Calculators simplify real situations and occasionally a rate, rule or explanation needs updating. If you spot an error, please send the page address, the inputs you used and what you expected to see through our contact page. We review reproducible calculation errors as a priority.
Start with the method
Read our calculator methodology for how formulas, rounding, dates, rates and revisions are handled, or browse the complete calculator library.