All calculators
Every calculator in one place. Choose a category to narrow things down, or scroll through the complete collection below.
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All calculators
Finance & Money
Home Loan Calculator
Repayments, total interest, and what paying a little extra saves.
Open calculator →Offset Account Calculator
What an offset account takes off a home loan: interest, and time.
Open calculator →Personal Loan Calculator
What the monthly repayment is, and what the borrowing really costs.
Open calculator →Credit Card Payoff Calculator
What the minimum costs, and what a fixed amount clears it in.
Open calculator →Australian Pay Calculator
Take-home pay after tax, Medicare levy and HELP — plus the super.
Open calculator →Compound Savings Calculator
Compound interest on regular deposits, at any rate and frequency.
Open calculator →Budget
Income and expenses, in and out, and what is left over.
Open calculator →Discount Calculator
What comes off, what is left, and what a second discount really does.
Open calculator →Inflation Calculator
See how inflation changes the value of money — and what the same amount could buy in the future.
Open calculator →Debt Snowball vs Avalanche Calculator
Compare two ways to clear multiple debts — see the interest, payoff dates and first debt gone.
Open calculator →Pay Rise Calculator
Turn a pay rise into real numbers — per year, month, fortnight, week and hour.
Open calculator →Lifetime Earnings Calculator
How much could you earn across your working life? Add pay rises, career breaks and inflation to see the bigger picture.
Open calculator →How Long Will My Savings Last? Calculator
See how many months your savings could cover your bills, and what spending a little less might change.
Open calculator →Savings Goal Calculator
Work out how much to save each month — or when you'll reach your goal — with a clear plan and progress chart.
Open calculator →How Much Do I Need to Retire? Calculator
Estimate your retirement savings target, see what your current plan could grow to, and find out what a few changes could do.
Open calculator →Net Worth Calculator
Add up your assets, subtract your debts, and see where your money really stands.
Open calculator →Health & Fitness
BMI Calculator
A height and weight on the BMI scale, with the healthy range.
Open calculator →Body Fat Percentage Calculator
Estimate body fat from simple measurements, and see what the percentage actually represents.
Open calculator →Walking Calories Calculator
See how much energy a walk may use, based on your weight, pace and time or distance.
Open calculator →Kilojoules to Calories Calculator
One number in, the other out: kilojoules and calories, both ways.
Open calculator →How long does caffeine stay in your system?
What is left in the body hour by hour, and how much at bedtime.
Open calculator →How many kilojoules a day does a person need?
What a day of energy comes to, as a band rather than a number.
Open calculator →Protein Intake Calculator
Daily protein reference ranges for your weight, compared and broken into meals.
Open calculator →Water Intake Calculator
Turn daily fluids into glasses and bottle refills, track your drinks, and understand what hydration guidelines actually count.
Open calculator →Math & Everyday
Percentage Calculator
Every percentage question there is, worked out a line at a time.
Open calculator →Age Calculator
How old, down to the second, from any date to any other.
Open calculator →Calculator
The everyday pad: the sum stays on screen while it is typed.
Open calculator →Scientific Calculator
Brackets, powers, logs and angles, with degrees or radians shown.
Open calculator →Grade & Final Exam Calculator
Add your marks and their weights, or see exactly what you need on the final exam.
Open calculator →Date Difference Calculator
Count the days, weeks and weekdays between any two dates — including leap years and optional inclusive counting.
Open calculator →Time Duration Calculator
The hours, minutes and seconds between two times — even when midnight gets in the way.
Open calculator →Fraction Calculator
Add, subtract, multiply, divide and simplify fractions — with the steps shown.
Open calculator →Life & Living
How much rent can I afford?
The rent a pay supports, at the 30% line most people quote.
Open calculator →Rent vs Buy Calculator
Compare the full financial position of renting and buying — mortgage, hidden costs, equity and invested savings.
Open calculator →Flatmate or on Your Own?
Sharing the rent and bills against the same place on your own.
Open calculator →Flatmate Bills — Who Pays What
Who owes what when the bills land — split evenly, or by share.
Open calculator →Subscription Cost Calculator
Add your subscriptions, see their real yearly cost, and explore what investing the money instead could look like.
Open calculator →Tip & Bill Split Calculator
Split the bill, work out the tip, and see exactly what everyone owes — evenly or by what they ordered.
Open calculator →Fuel Cost Calculator
See what a road trip or commute costs in fuel, including return drives and splitting the bill.
Open calculator →Electricity Cost Calculator
How much does it cost to run your appliances? Find the daily, monthly and yearly price tag — and what using less could save.
Open calculator →Car Cost Per Use
Find what each drive really costs — including depreciation, fuel, insurance and everything between.
Open calculator →Concrete Calculator
Work out concrete for slabs, footings and post holes — volume, bags, wastage and estimated cost.
Open calculator →Pet Ownership Cost Calculator
See what a pet could cost to bring home, care for each month, and look after over the years.
Open calculator →Curious Calculators
How many years of your life does this purchase cost?
A price tag turned into hours, days, weeks and years of working life.
Open calculator →What if you invested $5/day instead of coffee?
A daily coffee, invested instead, over ten, twenty, thirty years.
Open calculator →Cost per Use Calculator
A price divided by the uses, to see which option is really cheaper.
Open calculator →Gym Membership Cost per Use
A membership per visit, against a casual visit at the door.
Open calculator →How long to earn Elon Musk’s net worth?
A salary against his net worth, measured in million years.
Open calculator →What if your money doubled every day?
A dollar doubled daily, and the day each famous number goes past.
Open calculator →How much of your life have you slept?
The hours, days and years of a life already spent asleep.
Open calculator →What are you really paid an hour?
What the job pays once the unpaid hours are counted in.
Open calculator →What if you invested in Bitcoin?
Pick a date, replay a Bitcoin purchase, and see what it was worth — including the drops along the way.
Open calculator →Fun & Random
Spin the Wheel
Who buys the pizza, who drives? Names in, then spin.
Open calculator →Coin Flip
Heads or tails in one toss, or a hundred with the runs counted.
Open calculator →Roulette
Red, black or the zeros, with the house edge doing its work.
Open calculator →What are the odds two people share a birthday?
Why 23 people is enough to make a shared birthday likely.
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