About ToolNimba

ToolNimba is a growing library of free online tools, calculators, unit converters and generators, built to be fast, accurate and genuinely useful. We currently offer 561 tools, with many more added regularly.

What we stand for

Accuracy first. Every calculation uses established formulas and internationally-defined constants, and we show the working so you can check it yourself. Where a topic affects your health or money, we add plain-language context and cite authoritative sources.

Privacy by design. Our tools run entirely in your browser. The numbers and text you enter are processed on your own device and are never uploaded, logged or sold.

No friction. No sign-up, no paywalls, no clutter between you and the answer.

How our content is made

Each tool pairs a working calculator with an explainer, worked examples, reference tables and FAQs written and reviewed by our editorial team. We date every page when it is last reviewed so you can see how current it is. Found an error? We want to know, see the contact page.

A note on advice

Our health and finance tools are for general information and education only. They are not medical or financial advice. Always consult a qualified professional before making important decisions.