CrunchCalcs brings every financial calculator you need into one place — investments, loans, mortgages, retirement, stocks, valuation, salary, tax, budgeting, currency and the everyday percentages that keep tripping people up. It is free, fast, and needs no sign-up.
Two ideas
Every tool here is built around two ideas: that calculators should be easy to use, and that they should explain themselves. Inputs are clear, the result is computed the moment the page loads and updates live as you change the numbers, and each calculator is paired with a short note on the formula behind it and what the answer means in practice.
How we calculate
All calculations use standard financial formulas. The server computes a real result on page load — so the page works even without JavaScript — and the browser then mirrors that same calculation for instant updates. Intermediate values are carried at full precision and rounded only for display. Each calculator shows the exact formula it uses and the assumptions behind it.
Why I built it
I'm Arun, the person behind CrunchCalcs. I like building tools — usually ones that grow out of my own need, or that I've stumbled on and found genuinely useful.
CrunchCalcs started as a personal frustration. Every time I wanted to check a quick number — a loan EMI, what a monthly investment might grow to, whether a sale price was actually a good deal — the calculators I found were buried in ads, hid the formula, or asked me to sign up before showing an answer. Two of them would often disagree, and neither explained why.
I wanted one place where the maths is honest and visible: every tool shows the formula and the assumptions behind it, the result appears the instant the page loads, and nothing sits behind a login or a paywall. That is what CrunchCalcs is — built in the open, free for everyone, and growing one calculator at a time.
Not advice
CrunchCalcs provides educational tools. Nothing here is investment, tax, legal or financial advice, and figures are estimates based on the inputs and assumptions you provide. For decisions that matter, please speak to a qualified professional.
Get in touch
Spotted a bug, a wrong number, or a calculator we are missing? We would love to hear about it — write to us at [email protected].