Australia's money maths,solved in seconds
A reviewed collection of 20 free calculators for tax, take-home pay, HECS, super, mortgages, debt, business and energy — private and built for Australians.
- Built for Australia
- Privacy first
- Instant results
- Always free
20 reviewed calculators
A curated collection covering tax, pay, property, super, business and energy.
100% free
No accounts, no paywalls, no usage limits — every tool, every time.
Australian focused
Built on ATO 2026–27 rates, GST, HECS and super rules.
Privacy first
Calculations run in your browser. Your numbers never leave your device.
Most Popular Calculators
The tools Australians use every day.
Australian Income Tax Calculator
Estimate resident income tax, LITO and Medicare levy using 2026–27 settings.
Open calculatorTake-Home Pay Calculator
Estimate net pay after resident income tax, Medicare levy and an optional HELP repayment.
Open calculatorHECS/HELP Repayment Calculator
Estimate the compulsory HELP repayment from 2026–27 repayment income and the debt entered.
Open calculatorSuper Guarantee Calculator
Calculate employer super guarantee contributions at the current 12% rate on qualifying earnings under 2026–27 Payday Super rules, per pay cycle and year.
Open calculatorMortgage Calculator
Estimate principal-and-interest monthly repayments and total interest from your loan inputs.
Open calculatorMortgage Offset Calculator
Estimate how an Australian mortgage offset account can reduce home-loan interest and shorten the loan term. Compare results with and without an offset.
Open calculatorCar Loan Calculator
Calculate Australian car-loan repayments and total interest from the vehicle price, deposit, rate and term. Compare finance scenarios instantly.
Open calculatorOvertime Tax Calculator
Estimate the Australian tax and Medicare levy on overtime in 2026–27. See extra tax, after-tax overtime pay and the effective tax rate instantly.
Open calculatorHouse Price Growth Calculator
Project an Australian property's future value from an annual growth rate, or calculate CAGR between two prices. Includes a year-by-year table.
Open calculatorCalculator categories
All 20 reviewed tools, neatly organised.
Income, Tax and Work
5 calculators
Mortgages
4 calculators
Newly reviewed tools
Recent additions to CalcAussie's reviewed collection.
Electricity Bill Check Calculator
Check electricity usage, supply charges and billing totals against the figures shown on your bill.
Open calculatorGross Profit Calculator
Calculate gross profit and gross margin from revenue and direct cost of goods sold.
Open calculatorPay Rise Calculator
Compare gross annual, per-pay and hourly figures before and after a salary increase.
Open calculatorConveyancing Cost Estimator
Estimate Australian conveyancing costs from an ex-GST professional fee, optional 10% GST and a combined quoted disbursement amount.
Open calculatorMortgage Comparison Calculator
Compare repayments, interest and entered fees for three home loans using like-for-like assumptions.
Open calculatorFortnightly vs Monthly Mortgage Calculator
Compare equal annual repayments with the common half-monthly fortnightly strategy.
Open calculatorWhy use CalcAussie
Current ATO rates
Tax, pay and super tools use 2026–27 resident rates from one reviewed source of truth.
Nothing leaves your device
Every calculation runs locally in your browser. No accounts, no tracking of your numbers.
Instant, no waiting
Results update as you type — no submit-and-wait or page reloads, with the calculation kept clear and easy to read.
Works everywhere
Designed mobile-first, accessible by keyboard and readable from 320px up to widescreen.
Frequently asked questions
Everything you need to know about CalcAussie.
Are CalcAussie's calculators free to use?+
Yes — all 20 calculators in CalcAussie's reviewed collection are free, with no sign-up, no accounts and no limits on how often you use them.
Are the tax rates up to date for Australia?+
Yes. Our tax, pay and super tools use ATO 2026–27 resident rates, including the 2% Medicare levy and the 12% super guarantee. Rates live in one central file that is reviewed every financial year.
Do you store the numbers I enter?+
No. Every calculation runs locally in your browser. Nothing you type is sent to a server, logged or saved.
Can I use these on my phone?+
Yes. Every calculator is designed to work on current iOS, Android, tablet and desktop browsers, with instant results after the page loads.
Is this financial advice?+
No. CalcAussie provides general estimates only. For decisions about tax, loans, super or investments, speak to a licensed Australian professional.
General information only. CalcAussie gives estimates based on the figures you enter and published Australian rates. It is not financial, tax or legal advice — check with a licensed professional before acting on a result.