ozcalc.com
Everyday calculations, made simple.
Fast Australian calculators for pay, tax, housing, dates and everyday numbers — with the formula shown, not hidden. Type a command like 120 + gst or 95k salary.
Popular tools
- SalaryEstimate weekly, fortnightly, monthly and annual take-home pay from an Australian resident salary, using ATO PAYG withholding for each pay and year-end tax for the annual figure.
- GSTAdd 10% GST, remove GST from an inclusive price, or see the GST component using the Australian 1/11 rule.
- MortgageEstimate loan repayments, total interest and the principal/interest split for an Australian home loan.
- PercentageFind a percentage of a number, reverse a percentage, or calculate percentage increase, decrease and difference.
- RentConvert Australian rent between weekly, fortnightly, monthly and annual amounts using a 52-week year — not weekly × 4.
- SuperCalculate the 12% Superannuation Guarantee on an Australian salary, including the maximum contribution base and salary-plus-super packages.
- Income taxEstimate resident income tax, LITO and the Medicare levy from taxable income for 2026–27.
- FuelEstimate litres used and trip cost from distance, L/100 km consumption and the price at the pump, including an optional return trip.
Newly added
- PAYGEstimate Scale 2 PAYG withheld from a resident salary when the tax-free threshold is claimed, 2026–27.
- Extra repaymentsSee how extra monthly repayments cut home-loan interest and years remaining.
- OffsetEstimate interest saved when a transaction-account balance offsets a home loan.
- Compound interestProject a lump sum — with optional regular deposits — as interest compounds.
- Credit cardEstimate how long a card balance takes to clear at a fixed monthly payment, and the interest you would pay.
- Salary conversionConvert hourly, weekly, fortnightly, monthly and annual pay, and pro-rate a part-time salary from a 38-hour week.
- Public holidaysList public holidays for a year in a chosen state or territory, including many observed-Monday rules.
- LengthConvert millimetres, centimetres, metres, kilometres, inches, feet, yards and miles.
Australian calculators
- SalaryEstimate weekly, fortnightly, monthly and annual take-home pay from an Australian resident salary, using ATO PAYG withholding for each pay and year-end tax for the annual figure.
- Income taxEstimate resident income tax, LITO and the Medicare levy from taxable income for 2026–27.
- PAYGEstimate Scale 2 PAYG withheld from a resident salary when the tax-free threshold is claimed, 2026–27.
- GSTAdd 10% GST, remove GST from an inclusive price, or see the GST component using the Australian 1/11 rule.
- SuperCalculate the 12% Superannuation Guarantee on an Australian salary, including the maximum contribution base and salary-plus-super packages.
- Medicare levyEstimate the 2% Medicare levy with the 2026–27 single low-income shade-in.
- Financial yearSee which financial year a date falls in, and how many days remain in the current year.
- Business daysCount Australian business days between two dates, or add and subtract working days, with national and state public holidays.
- Public holidaysList public holidays for a year in a chosen state or territory, including many observed-Monday rules.
- Workdays / yearCount weekdays minus public holidays in a calendar year for an Australian state or territory.
Collections
All collections- Buying a homeDeposit, LVR, repayments, extra payments and offset — the numbers around a purchase.Deposit · LVR · Mortgage · Extra repayments · Offset
- Understanding your payTake-home pay, super, hourly conversion, a pay rise and reading a job ad.Salary · Super · Salary conversion · Pay rise · Salary package
- Planning a road tripFuel cost, L/100 km, travel time and distance conversion for an Australian drive.Fuel · Fuel economy · Travel time · Length
Browse by category
- MoneySalary, tax, GST, superannuation, percentages, savings, interest and loans — Australian-first, with official rates where the numbers are regulated.21 calculators
- HomeMortgage repayments, rent conversions, property costs, electricity and household bills, using annualised figures instead of rough weekly × 4 shortcuts.11 calculators
- WorkLeave hours, overtime, timesheets, shift length and pay conversions. Business-day counts use Australian public holidays by state.12 calculators
- Dates & timeDate differences, business days, age-style calendar spans and working-day arithmetic, including Australian public holiday data by jurisdiction.9 calculators
- TravelFuel, distance, trip cost and travel time. Start with a fuel cost calculator using litres per 100 km — the consumption figure on Australian windscreens.4 calculators
- EverydayPercentages, ratios and unit conversions for the calculations people actually do between larger financial decisions.7 calculators