About
Calculate.to
Prefer a physical calculator?
A few solid picks. As an Amazon Associate, Calculate.to earns from qualifying purchases, at no extra cost to you.
OSALO Desktop Calculator
Extra-large 12-digit LCD, giant buttons, solar + battery, the classic office desk workhorse.
View on Amazon →
Helix Oxford Scientific
240-function scientific calculator for KS3–KS4 maths, with hard cover. Exam-friendly, plastic-free packaging.
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Casio fx-83GTCW+
The UK classroom-standard scientific calculator (also in pink), allowed in most UK exams.
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ROATEE Construction Calc
Feet-inch-fraction engineering calculator for carpenters, framers and contractors on site.
View on Amazon →
What this is
Calculate.to is a collection of 100+ free calculators for the math of everyday life, money, health, home, school, kitchen, cars and dates. Every tool runs instantly in your browser, works on any device, and asks for nothing: no account, no pop-ups, no ads chasing you down the page.
Who builds it
Calculate.to is built and maintained by an independent developer and engineer in the United Kingdom. It is a small operation on purpose, one person who cares that the numbers are right and the pages are calm.
How the numbers are checked
Every calculator's math is verified against known benchmarks before it ships: loan payments against standard amortization tables, the inflation tool against published BLS CPI figures, health formulas against their original published equations (Mifflin–St Jeor, the US Navy method, Epley and Brzycki, Naegele's rule). Where a formula is an estimate, the page says so plainly and explains its limits, you will find honest caveats on this site, not false precision.
What the tools are not
These are educational tools, not professional advice. Financial pages are not financial advice; health pages are not medical advice; pregnancy dates are estimates your provider will refine. For decisions that matter, the calculators give you the right starting number, a professional gives you the answer for your situation.
Contact
Questions, corrections, or a calculator you wish existed: business@luck.fyi. Corrections are taken seriously and fixed fast.