About Web Utility Services

Web Utility Services is a small collection of calculators for hobbies and home projects: brewing, making and fixing things. Each tool tries to do one job well, with the answer visible straight away and no sign-up.

How the tools are built

• Every formula is checked against at least two published sources, which are listed and linked on the tool’s page.
• The math is covered by automated tests, including the worked examples from those sources.
• Pages say where a result is an estimate and when it may be wrong.
• All calculation happens in your browser. What you type is not sent to us or stored.

Corrections

If you spot an error or a result that doesn’t match a trusted reference, please get in touch. Each tool page shows when it was last reviewed.