Your Calculation Mate
100+ free online calculators built for Australians. Tax, mortgage, health, business — all with current rates and state-specific data.
Try: "take home pay", "stamp duty", "BMI", "mortgage"
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Most Popular
Take Home Pay Calculator
Calculate your net pay after income tax, Medicare levy, and superannuation deductions.
Mortgage Repayment Calculator
Calculate your home loan repayments, total interest payable, and amortisation schedule.
Stamp Duty Calculator — All States
Compare stamp duty across all Australian states and territories on one page.
BMI Calculator
Calculate your Body Mass Index and see which weight category you fall into.
Calorie Intake Calculator
Calculate your daily calorie and macronutrient targets for weight loss, maintenance, or muscle gain.
Fuel Cost Calculator
Calculate the fuel cost for a trip based on distance, fuel consumption rate, and petrol price.
Days Between Dates Calculator
Calculate the number of days, weeks, months, and business days between any two dates.
GST Calculator
Add GST, remove GST, or find the GST component of any amount — Australian 10% GST.
Percentage Calculator
Calculate percentages three ways — X% of Y, X is what % of Y, and percentage change between two values.
Compound Interest Calculator
Calculate compound interest with regular contributions, showing growth over time with different compounding frequencies.
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