46 tools · updated regularly
All calculators
Every tool in the workshop, searchable by name or keyword. No account, no waiting, no saved data to clear up afterwards.
Finance
13Mortgage Payment Calculator
Work out the monthly principal and interest on a home loan, plus the total cost of borrowing over the full term.
Loan Payment Calculator
Estimate the fixed monthly instalment on any amortising loan and see how much interest rides along with it.
Compound Interest Calculator
Grow a starting balance with regular contributions and see the moment compounding starts doing the heavy lifting.
Savings Goal Calculator
Find out how long a target balance takes to reach, given what you have now, what you add, and the rate you earn.
Debt Payoff Calculator
See the payoff date for a single balance at a fixed instalment, and what happens when you raise the payment.
Tip and Bill Split Calculator
Add a tip to a bill, divide it evenly across the table and know exactly what each person owes.
GST and VAT Calculator
Add or remove GST and VAT using the standard rate for Australia, New Zealand, the UK, Canada, Singapore, India or Ireland.
Income Tax and Take-Home Pay Calculator
Estimate take-home pay from a gross salary in Australia, the United States, the United Kingdom, Canada, New Zealand or India.
US Sales Tax Calculator
Work out combined state and local sales tax for any US state, adding or removing tax from a price.
Superannuation Calculator
Project an Australian superannuation balance at retirement using the 12% employer guarantee, salary growth and a long-run return.
401(k) Calculator
Project a 401(k) balance with your monthly contribution, the employer match and compounding returns.
Inflation Calculator
See what an amount will cost in the future at a given inflation rate, and what purchasing power it loses along the way.
Salary to Hourly Calculator
Convert an annual salary into an hourly, daily, weekly and monthly rate using your real paid hours.
Math
10Percentage Calculator
Find a percentage of a number, or increase and decrease it, with every variation shown side by side.
Average Calculator
Paste a list of numbers to get the mean, median, mode and range, with a clear count of what was included.
Ratio Calculator
Simplify any two-part ratio, express it as a decimal, and split a total into proportional shares.
Fraction Simplifier
Reduce a fraction to its lowest terms and read it back as a decimal, a percentage and a mixed number.
Area and Perimeter Calculator
Choose a shape, enter its dimensions, and get area and perimeter in matching square and linear units.
Pythagorean Theorem Calculator
Solve a right triangle for the hypotenuse or a missing leg, with the squares and the angle included.
Standard Deviation Calculator
Enter a list of numbers to get the standard deviation, variance, mean, range and standard error for a sample or a population.
GCD and LCM Calculator
Find the greatest common divisor and lowest common multiple of any list of whole numbers, with the reduced ratio.
Quadratic Equation Solver
Solve ax² + bx + c = 0 for real or complex roots, with the discriminant, vertex and axis of symmetry.
Binary, Hex and Decimal Converter
Convert a number between binary, octal, decimal and hexadecimal, with the bits and bytes it needs.
Health and fitness
8BMI Calculator
Calculate body mass index in metric or imperial units and place it against the standard reference bands.
BMR Calculator
Estimate the calories your body burns at complete rest using the Mifflin-St Jeor equation.
Daily Calorie Estimate
Scale your resting energy by activity level to estimate daily maintenance calories and common targets.
Body Fat Estimator
Estimate body fat percentage from tape measurements using the US Navy circumference method.
Ideal Weight Range
Compare four published ideal-weight formulas for your height, then see the healthy BMI span as context.
Pregnancy Due Date Calculator
Estimate a due date from the first day of your last period, with current gestational age, trimester and weeks remaining.
Running Pace Calculator
Turn a distance and time into pace per kilometre and per mile, with projected 5K, 10K, half and marathon times.
Macro Calculator
Split a daily calorie target into grams of protein, carbohydrate and fat for balanced, high protein, lower carb or endurance eating.
Date and time
4Date Difference Calculator
Count the days, weeks and full months between two dates, including or excluding the end date.
Age Calculator
Get an exact age in years, months and days as of today or any chosen date, plus the next birthday countdown.
Add or Subtract Days
Shift a date forward or back by days, weeks or months and see exactly which weekday you land on.
Time Duration Calculator
Measure the hours and minutes between two clock times, with overnight shifts handled correctly.
Conversions
6Length Converter
Convert between metres, kilometres, centimetres, feet, inches, yards and miles instantly.
Weight Converter
Switch between kilograms, grams, pounds, ounces and stones with the same number in every unit.
Temperature Converter
Move between Celsius, Fahrenheit and Kelvin, with the conversion steps spelled out underneath.
Volume Converter
Convert litres, millilitres, cubic metres, gallons, quarts, cups and spoons in one pass.
Speed Converter
Translate between kilometres per hour, metres per second, miles per hour, knots and feet per second.
Area Converter
Convert square metres, square feet, hectares and acres, useful for property and land comparisons.
Everyday tools
5Fuel Cost Calculator
Price a trip from distance, fuel efficiency and pump price, including the cost of each leg of the journey.
Discount and Sale Price Calculator
See the final price after a percentage discount, how much you save, and the effective rate after tax.
Cooking Measurement Converter
Convert recipe volumes between cups, tablespoons, teaspoons, millilitres and fluid ounces without guesswork.
Time Zone Converter
Find the local time in another city for a given date and clock time, with the offset difference shown.
Paint Calculator
Estimate how many litres of paint a room needs from its dimensions, the number of coats and the coverage on the tin.