Everyday decisions, made simpler.
Calcaroo exists to make everyday decisions easier with practical calculators, converters and plain-English guides.
From mortgages and savings to DIY measurements, health tools and quick everyday calculations, Calcaroo helps you get clear answers fast. We started with strong UK-focused financial tools, but many of the calculations and concepts are useful wherever you are.
A quick, important note
Calcaroo's calculators and guides are educational tools designed to help you explore your options and run the numbers. They are not financial, legal or tax advice. For decisions that really matter — a mortgage, a pension, a big investment — please speak to a qualified, regulated adviser.
Quick by design
No signups, no clutter, no pop-ups. Open Calcaroo, get your answer, get on with your day.
Accurate and trustworthy
Every formula is checked against trusted sources. When rules change — like tax bands — we update them.
Friendly, not technical
We use plain language and friendly questions instead of jargon, so anyone can get a confident answer.
Made for everyone
Calcaroo supports metric and imperial, multiple currencies, and works beautifully on any device.
Always improving
We're constantly adding new calculators based on what people actually need. Got an idea? Tell us.
Independent and free
Calcaroo is independently built and free to use. Light, unobtrusive ads help keep it that way.
Our promise
Calcaroo will always be free, fast, and respectful of your time and privacy. We don't ask for accounts, we don't sell your data, and we don't bury you in pop-ups. Just helpful answers, every time.