206 free calculators, one place
Finance, AU tax, health, trade, farming, cooking. Each one shows the formula and assumptions, so you can check the number instead of trusting a black box.
Four steps
How a calculation runs on CalcHub
Every tool on the site follows the same four steps. No account, no paywall, and the maths runs in your browser.
Search or open a category
Type what you are working out, or start from one of the seventeen categories. Finance holds 38 tools, australian-finance 18, health 24, farming 19, trade-construction 13. The full A-Z lists all 206.
Enter the numbers you have
Fill in the inputs you already know. Fields explain what they expect, so a loan term in years is not quietly read as months. NaN and Infinity results fail our build tests before a tool ever goes live.
Read the working, not just the answer
Under each result sits the formula, the assumptions it made, and the sources with the date they were last reviewed. AU tax, super and study loan figures are reviewed each July.
Share the result by URL
After you press calculate, the inputs sit in the query string, so the link reproduces the same result for whoever you send it to. Nothing from that calculate step is stored on our server.
03
How we work
A clear path from first conversation to finished work.
Australian tax and money calculators
Eighteen australian-finance tools covering super, HECS-HELP, take-home pay and stamp duty, with the figures and their review dates shown on each calculator page. Reviewed each July. General information only, not tax or financial advice.
Finance and loan calculators
Thirty-eight finance tools for loans, mortgages, compound interest and debt payoff. Each one shows the formula and the assumptions behind the result, so the working can be checked rather than taken on trust.
Health and fitness calculators
Twenty-four health tools including BMI, TDEE, calories and macros, reviewed when the issuing body updates its guidance. General information only, not medical advice.
Trade, construction and farming calculators
Thirteen trade-construction tools and nineteen farming tools for concrete, load, stairs and agricultural quantities. Useful for estimating, not a substitute for engineering sign-off.
A working reference library, not a lead-generation funnel. If a result is wrong, tell us the calculator and the inputs you used, and we change the code and add a test so it stays fixed.
Seventeen categories
Pick the free calculators that match your job
The library is grouped by the work people actually bring to it. Counts below are live tool counts, not marketing rounding.
05 — Common questions
What people ask before they trust a number
Short answers, no hedging. If something here is still unclear, the contact form takes the calculator name and your inputs.
Frequently Asked Questions
- Is CalcHub free?
- Yes. All 206 calculators are free to use, with no account, no paywall and no upsell. If that ever changed, it would be stated on the About page first.
- Do you store my numbers?
- The calculation runs in your browser. Nothing from the calculate step is stored on our server. One thing to know: when you share a result, the inputs travel inside the URL query string, so the link itself carries your figures. Treat a shared link the same way you would treat the numbers on it.
- Can I get tax, medical or legal advice here?
- No. CalcHub is general information only, not financial, tax, medical, legal or engineering advice, and we cannot advise on individual circumstances. The tools show the formula and assumptions so you can take that working to an accountant, a doctor or an engineer.
- How do I report a wrong result?
- Use the contact form and give us the calculator name or link, the inputs you entered, the result you got and the result you expected. A source helps. A correction is a code change plus a test, so the same fault cannot come back.
- How often are the Australian figures reviewed?
- AU tax, super and study loan tools are reviewed each July. US federal tools are reviewed when inflation adjustments publish, health tools when the issuing body updates its guidance, and everything else at least annually. The review date sits on the calculator page beside the sources.
Open a category and run your numbers
Seventeen categories, 206 free calculators, formula shown on every one. General information only, not financial, tax, medical, legal or engineering advice.