Calculator directory
All calculators
Browse CalcAussie's reviewed collection of 57 free Australian calculators, grouped by category. Search or filter to find yours.
Showing 57 of 57 reviewed calculators
Income, Tax and Work
7 toolsTax Calculator
Estimate Australian income tax for 2026–27 using current resident brackets, LITO and the Medicare levy phase-in for a single taxpayer with no dependants.
Open calculatorTake-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 calculatorHECS/HELP Repayment Calculator
Estimate your compulsory HECS-HELP repayment for 2026–27 and see how an entered voluntary payment reduces the remaining study-debt balance.
Open calculatorPay Rise Calculator
Compare your old and new Australian salary to see the exact dollar increase, percentage rise and what it means per week, fortnight, month and hour.
Open calculatorWeekly Timesheet Calculator
Add up a week of start and finish times, minus unpaid breaks, for total paid hours, decimal hours and ordinary-time gross pay. Handles night shifts.
Open calculatorLeave Accrual Calculator
Estimate Australian annual or personal leave accrued, used and remaining from ordinary hours, service, roster days and non-accruing unpaid leave.
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 calculatorSuper and Retirement
1 toolsSaving and Investing
3 toolsCompound Interest Calculator
Calculate compound interest on one starting balance using an entered rate, term and compounding frequency. See projected growth and total interest.
Open calculatorSimple Interest Calculator
Calculate simple interest on a deposit or loan from the principal, annual rate and term. See total interest and final balance instantly for free.
Open calculatorChristmas Savings Plan Calculator
Work out how much to save each week or fortnight to cover your Christmas budget for gifts, food and travel before the big day.
Open calculatorProperty
2 toolsHouse 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 calculatorConveyancing Cost Estimator
Estimate Australian conveyancing costs from an ex-GST professional fee, optional 10% GST and a combined quoted disbursement amount.
Open calculatorMortgages
4 toolsMortgage Calculator
Estimate monthly principal-and-interest home-loan repayments and total interest from the property price, deposit, rate and term you enter.
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 calculatorMortgage Comparison Calculator
Compare three Australian home loans side by side, factoring in introductory rates, fees and extra repayments to estimate interest and fee costs.
Open calculatorFortnightly vs Monthly Mortgage Calculator
See how switching Australian home loan repayments from monthly to genuine fortnightly instalments could shorten your loan term and cut total interest paid.
Open calculatorLoans and Debt
1 toolsBusiness
2 toolsGST 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 calculatorGross Profit Calculator
Work out gross profit and gross margin from revenue and cost of goods sold for your Australian business.
Open calculatorVehicles
1 toolsEnergy
5 toolsGas Bill Calculator
Estimate your gas bill from MJ or cubic metres, your usage rate and daily supply charge, with heating value and pressure factor conversion.
Open calculatorWater Bill Calculator
Estimate your water bill from usage in kilolitres, your utility's usage charge and fixed service charges.
Open calculatorPeak vs Off-Peak Usage Calculator
Compare a time-of-use electricity plan with peak, shoulder and off-peak rates against a flat rate, including each plan's daily supply charge.
Open calculatorElectricity Bill Check Calculator
Recalculate a flat-rate electricity usage and daily-supply subtotal, then compare it with the bill total entered.
Open calculatorComputer Electricity Cost Calculator
Estimate the running electricity cost of a computer, console or other device from its wattage, hours used and your tariff.
Open calculatorEveryday Tools
3 toolsPercentage Calculator
Work out a percentage of a number, percentage change, an increase or decrease by a percentage, and what percent one number is of another.
Open calculatorReverse Percentage Calculator
Find an original value before a percentage increase or decrease, including discounts and increases above 100%. See the change amount instantly.
Open calculatorRounding Calculator
Round positive or negative numbers to a chosen number of decimal places. See the rounded value and method instantly with a clear worked result.
Open calculatorConstruction
1 toolsUnits and Conversions
4 toolsTemperature Converter
Convert Celsius, Fahrenheit and Kelvin instantly, including oven and weather temperatures, with the exact formulas and absolute-zero checks shown.
Open calculatorVolume Converter
Convert litres, millilitres, Australian and US cups, fluid ounces, cubic metres and US or UK gallons instantly with exact factors.
Open calculatorArea Converter
Convert square metres, hectares, acres, square feet, square yards and square kilometres instantly for Australian land, property and floor plans.
Open calculatorSpeed Converter
Convert km/h, mph, metres per second and knots instantly using exact factors. Compare Australian speed limits with overseas speeds.
Open calculatorTime and Dates
9 toolsDays Between Dates Calculator
Count the days between two dates as days elapsed or with both dates included, plus decimal weeks and approximate months. Uses DD/MM/YYYY dates.
Open calculatorWorking Hours Between Dates Calculator
Estimate working hours between two dates from weekdays, public holidays and your daily hours, such as 7.6 hours for a 38-hour week.
Open calculatorWeeks Between Dates Calculator
How many weeks between two dates or until an event? See full weeks, leftover days and total days, using DD/MM/YYYY dates in either order.
Open calculatorMonths Between Dates Calculator
Count the full months and leftover days between two dates, with years, months and total days, including month-end dates like 31 January.
Open calculatorHours and Minutes Calculator
Add or subtract hours and minutes, carrying minutes into hours correctly, and see the result in decimal hours for timesheets and pay.
Open calculatorDecimal Hours Converter
Convert hours and minutes to decimal hours for timesheets and payroll, or decimal hours back to hours and minutes, without rounding errors.
Open calculatorShift Length Calculator
Calculate paid shift hours after unpaid breaks for any start and finish minute, including overnight shifts. See hours, minutes and decimal hours.
Open calculatorPay Period Calculator
Find your next pay date, days until payday, the next six pay dates and whether the financial year has 26 or 27 fortnightly pays.
Open calculatorDate to Financial Year Calculator
Enter any date to find its Australian financial year, start and end dates, quarter, day number and whether the year has 365 or 366 days.
Open calculatorHealth
1 toolsEducation
4 toolsWeighted Grade Calculator
Enter up to eight assessment marks and weightings to get your weighted grade, each task's contribution and the marks earned so far, plus a grade band.
Open calculatorFinal Grade Needed Calculator
Find the average score needed on your final exam or remaining assessment from your current grade average, completed weighting and target overall grade.
Open calculatorPercentage to Grade Calculator
Turn marks into a percentage, e.g. 17 out of 25 = 68%, and see an indicative High Distinction, Distinction, Credit, Pass or Fail band.
Open calculatorAttendance Percentage Calculator
Work out your class attendance percentage and how many remaining classes you can miss while still meeting an 80% or other minimum.
Open calculatorFamily and Household
4 toolsGrocery Budget Calculator
Estimate a weekly, monthly and yearly grocery budget for adults, younger children and household items, using your own spending figures.
Open calculatorRent Split Calculator
Split rent and shared bills between 2 to 6 housemates evenly, by room weighting or percentage, with each person's weekly, fortnightly and monthly amount.
Open calculatorBill Split Calculator
Split a shared bill evenly or by shares such as days stayed or usage. Amounts are rounded to whole cents and always add up to the bill exactly.
Open calculatorLaundry Cost Calculator
Estimate the cost per wash and dryer load, plus weekly and yearly laundry costs, from energy and water use, detergent and your bills.
Open calculatorTravel
4 toolsRoad Trip Fuel Cost Calculator
Estimate Australian road-trip fuel use and cost from distance, fuel economy and pump price. Split the total between travellers and test scenarios.
Open calculatorFlight Arrival Time Calculator
Estimate local arrival time from a departure time, known flight duration and destination time-zone difference, including overnight and date-line day offsets.
Open calculatorHoliday Savings Calculator
Work out how much to save each week, fortnight or month to reach your holiday budget by your travel date, plus the weekly equivalent.
Open calculatorAccommodation Cost Calculator
Calculate total accommodation cost from the nightly rate and number of nights, then split the stay between travellers. Compare trip costs instantly.
Open calculator