Australia's money maths,solved in seconds
500 free calculators for tax, take-home pay, HECS, super, mortgages, debt, business and energy — accurate, private and built for Australians.
- Built for Australia
- Privacy first
- Instant results
- Always free
500+ calculators
Tax, pay, property, super, business and energy tools in one place.
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.
Take-Home Pay Calculator
Work out your estimated Australian take-home pay after income tax, the Medicare levy, HELP repayments and salary sacrifice for the 2026–27 year.
Open calculatorTax Calculator
Estimate Australian income tax for 2026–27 using current resident brackets and the Medicare levy phase-in for a single taxpayer with no dependants.
Open calculatorMortgage Calculator
Estimate principal-and-interest home loan repayments and total interest owed over the loan term at current Australian mortgage interest rates today.
Open calculatorHECS/HELP Repayment Calculator
Estimate your compulsory HECS-HELP student loan repayment for 2026–27 and see exactly how voluntary payments shrink your remaining study debt faster.
Open calculatorGST Calculator
Add or remove Australia's 10% Goods and Services Tax from any amount instantly using the standard ATO divide-by-eleven calculation method for GST.
Open calculatorExtra Mortgage Repayment Calculator
See how much interest and how many years you save by adding extra repayments to your Australian home loan each month, on top of the standard schedule.
Open calculatorCredit Card Repayment Calculator
Find out how long your Australian credit card balance will take to pay off, what it costs in interest, and exactly how much extra repayments can save.
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 calculatorFuel Cost Calculator
Estimate trip, weekly and annual petrol costs in Australian dollars from your car's L/100km fuel economy and the current price per litre at the pump.
Open calculatorCalculator categories
All 500 tools, neatly organised.
Income, Tax and Work
62 calculators
- Tax Calculator
- Take-Home Pay Calculator
- HECS/HELP Repayment Calculator
- Contractor Hourly Rate Calculator
- ABN Tax and GST Set-Aside Calculator
- Working Holiday Maker Tax Calculator
Super and Retirement
27 calculators
- Super Guarantee Calculator
- Salary Sacrifice Calculator
- Super Contribution Cap Calculator
- Retirement Savings Calculator
- FIRE Number Calculator
- Super Retirement Projection Calculator
Saving and Investing
44 calculators
- Savings Calculator
- Compound Interest Calculator
- Emergency Fund Calculator
- Net Worth Calculator
- Simple Interest Calculator
- Inflation Calculator
Property
30 calculators
- Rental Yield Calculator
- Rent Affordability Calculator
- House Price Growth Calculator
- Property Buying Cost Calculator
- Property Selling Cost Calculator
- Rent vs Buy Calculator
Mortgages
32 calculators
- Mortgage Calculator
- Home Deposit Calculator
- Extra Mortgage Repayment Calculator
- Mortgage Offset Calculator
- Mortgage Refinance Calculator
- Interest-Only Mortgage Calculator
Loans and Debt
23 calculators
- Credit Card Repayment Calculator
- Personal Loan Calculator
- Debt Snowball Calculator
- Balloon Payment Calculator
- Debt-to-Income Ratio Calculator
- Credit Card Minimum Payment Calculator
Business
32 calculators
- GST Calculator
- Break-Even Calculator
- Profit Margin Calculator
- Markup Calculator
- BAS / GST Payable Calculator
- Invoice Late Fee Calculator
Vehicles
27 calculators
- Car Loan Calculator
- Fuel Cost Calculator
- Vehicle Depreciation Calculator
- Car Running Cost Calculator
- EV vs Petrol Calculator
- Novated Lease Calculator
Energy
27 calculators
- EV Charging Cost Calculator
- Electricity Cost Calculator
- Solar Payback Calculator
- Solar Panel Savings Calculator
- Home Battery Payback Calculator
- Hot Water System Cost Calculator
Everyday Tools
27 calculators
- Age Calculator
- Percentage Calculator
- Date Difference Calculator
- Percentage Change Calculator
- Unit Conversion Calculator
- BMI and Health Calculator
Units and Conversions
14 calculators
- Length Converter
- Weight and Mass Converter
- Temperature Converter
- Volume Converter
- Area Converter
- Speed Converter
Time and Dates
20 calculators
- Business Days Calculator
- Days Between Dates Calculator
- Working Hours Between Dates Calculator
- Add or Subtract Days Calculator
- Weeks Between Dates Calculator
- Months Between Dates Calculator
Health
14 calculators
- BMR Calculator
- TDEE / Daily Calorie Needs Calculator
- Body Fat Percentage Calculator (US Navy Method)
- Ideal Weight Calculator
- Waist-to-Hip Ratio Calculator
- Waist-to-Height Ratio Calculator
Education
20 calculators
- GPA Calculator
- Weighted Grade Calculator
- Final Grade Needed Calculator
- Exam Score Calculator
- Assignment Weight Calculator
- Percentage Grade Calculator
Family and Household
20 calculators
- Household Budget Calculator
- Grocery Budget Calculator
- Rent Split Calculator
- Bill Split Calculator
- Shared Expenses Calculator
- Child Care Cost Calculator
Travel
20 calculators
- Travel Budget Calculator
- Manual Currency Conversion Calculator
- Road Trip Fuel Cost Calculator
- Road Trip Cost Calculator
- Flight Time Calculator
- Jet Lag Time Shift Calculator
E-commerce
20 calculators
- E-commerce Profit Calculator
- Marketplace Fee Calculator
- Conversion Rate Calculator
- Cost Per Click Calculator
- Cost Per Thousand Impressions Calculator
- Cost Per Acquisition Calculator
Newly added tools
The latest additions to CalcAussie.
Correlation Coefficient Calculator
Measure the strength and direction of the linear relationship between two variables using up to 4 paired X and Y values.
Open calculatorLinear Regression Calculator
Fit a straight line through up to 4 paired X and Y values and predict Y for any given X using ordinary least squares.
Open calculatorWeighted Index Calculator
Combine up to 4 values with their own weights into a single weighted average or index number, similar to how a price index is built.
Open calculatorMoving Average Calculator
Smooth out short-term fluctuations in up to 8 chronological data points using a simple moving average over a chosen window.
Open calculatorExponential Smoothing Calculator
Forecast the next value in a chronological series of up to 8 data points using simple exponential smoothing with an adjustable smoothing factor.
Open calculatorGeometric Mean Calculator
Calculate the geometric mean of up to 8 positive growth factors, giving the equivalent constant compound growth rate.
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, no page reloads, no ads in the way.
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 500 calculators on CalcAussie are 100% 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?+
Absolutely. Every page is mobile-first and works on iOS, Android, tablets and desktops, including offline-friendly instant results.
Is this financial advice?+
No. CalcAussie provides general estimates only. For decisions about tax, loans, super or investments, speak to a licensed Australian professional.
Popular related searches
- Take-Home Pay Calculator
- Tax Calculator
- Mortgage Calculator
- HECS/HELP Repayment Calculator
- GST Calculator
- Extra Mortgage Repayment Calculator
- Credit Card Repayment Calculator
- Super Guarantee Calculator
- Fuel Cost Calculator
- Correlation Coefficient Calculator
- Linear Regression Calculator
- Weighted Index Calculator
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.