Stable Numbers
About Stable Numbers
Clear calculators and guides for everyday numbers.
Who we are
Stable Numbers is a small independent project built to make working with numbers easier. We focus on clean, fast calculators and explainers that strip away clutter and deliver results in seconds.
What we do
We create simple tools for percentages, conversions, finance, tax and everyday maths. Each page includes not only the calculation but also a short explanation and a worked example. The aim is to help people check figures quickly and understand the method without opening a spreadsheet.
Contact us
If you have a question about the site, spot an issue, or want to get in touch, email us at hello@stablenumbers.com. We do our best to reply promptly.
Request a tool
Have an idea for a calculator or guide that would save you time? Let us know. We prioritise requests based on demand and usefulness. Popular ideas are added to the public roadmap and built into the site over time.
Custom-built tools
If you need a calculator tailored to your business or project, we also offer custom builds. The cost is £50 per hour, covering design, development, testing and support. This is ideal for businesses who want branded tools, industry-specific formulas or internal calculators.
To discuss a custom project, email hello@stablenumbers.com with your requirements and we will provide an estimate.