About gazza.ltd
Free calculators and everyday tools, built to show their working.
What this is
gazza.ltd is a small, growing collection of single-purpose calculators and utilities — mortgages, word games, text tools, and more being added over time. Every tool is free, requires no sign-up, and runs entirely in your browser.
How the tools work
Each calculator explains the method it uses underneath the tool itself, with a worked example using real numbers, so you can check a result rather than just trust it. Nothing you type is sent anywhere or stored — see the privacy policy for the full detail.
Terms of use
The calculators on this site are provided for general informational purposes only. They are not financial, legal, medical or professional advice, and results should be treated as estimates rather than guarantees. Formulas and reference data (such as tax bands or dictionary word lists) are kept as accurate and current as we can manage, but you should verify anything you're relying on for an important decision with a qualified professional or an official source.
The site is provided as-is, without warranty of any kind. We aren't liable for decisions made using the figures these tools produce.
Advertising
This site is supported by display advertising, which is what keeps every tool free to use. See the privacy policy for how advertising cookies work and how to opt out of personalised ads.
Get in touch
Spotted a bug, have a tool request, or found an error in a calculation? Email hello@gazza.ltd.