Simple, honest tools that respect you
About Calculyn
Calculyn is a free calculator website with 200+ calculators for money, math, health, home, everyday life and conversions. No ads, no third-party trackers, no sign-up.
What Calculyn is
218 calculators, all free, all in your browser. You never need an account, an email address or a paywall to get an answer. Type your numbers, read the result, move on with your day. The tools are grouped into six areas:
- Money — 84 tools. Clear numbers for big decisions.
- Home — 23 tools. Measure twice, buy once.
- Health — 33 tools. Know your body's numbers.
- Math — 36 tools. The clever shortcuts.
- Everyday — 26 tools. Little answers, all day long.
- Conversions — 16 tools. Any unit, instantly.
Prefer to browse? See all calculators, or start with the most-used ones.
Every calculator shows its work
Each calculator page shows the formula it uses and one worked example, so you can check the math yourself instead of taking the number on faith. Results are calculated right in your browser with standard formulas — never guessed or generated by AI. Where a figure depends on a year, such as tax brackets or contribution limits, the page states which year it applies to.
Who builds Calculyn
Calculyn is built and maintained by George Guju, an Adult-Gerontology Acute Care Nurse Practitioner. George builds every calculator himself — the inputs, the formulas, the examples and the wording around the results.
The habit behind the site is a clinical one: a number is only useful if you can see where it came from and what it leaves out. That is why nothing here hides its method, and why results are labelled as educational estimates rather than advice. Calculyn is not a substitute for a qualified professional, and founder attribution is not a claim that a calculator has been independently reviewed by a financial, tax or medical expert.
What we don't do
- No ads. No banners, no sponsored results, no affiliate nudges inside a calculator.
- No third-party trackers. Nothing is loaded from advertising or analytics networks, and what you type into a calculator is never recorded.
- No sign-up. Every calculator works without an account, and no email is required to use one.
The only counting we do is our own: with your consent, the site records which pages were visited in its own database so George knows what to build next. You can decline, or change your mind, at any time — see the privacy policy.
Mission
Simple, honest tools that respect the visitor. If a number matters to you, you should be able to see how it was calculated, know it didn't cost you your privacy, and leave without signing up for anything.
Get in touch
Spotted a wrong formula, an out-of-date rate or a confusing result? Tell George on the contact page — corrections are welcome. Want one of these calculators on your own site, blog or class page? The free embed program gives you a one-line code snippet for any calculator, with no ads and no account.
Brand assets
Our mark is a letter C with an equals sign inside it. Download the square profile image below for LinkedIn or any other account that wants a 1024 × 1024 picture.
