Everyday Calculators
Quick calculators for percentages, fuel, electricity, solar, ages and dates.
- Percentage Calculator
Solves the most common percentage questions in one place.
- Fuel Cost Calculator
Calculates the fuel cost of a road trip or commute.
- Electricity Cost Calculator
Works out how much an appliance costs to run.
- Solar Payback Calculator
Estimates how long a rooftop solar system takes to pay for itself.
- Age Calculator
Calculates exact age in years, months and days.
- Days Between Dates Calculator
Counts the days, weeks and weekdays between two dates.
About these calculators
Some of the most useful calculations are the small everyday ones: how much a road trip costs in fuel, what an appliance adds to the power bill, or how many working days are left until a deadline.
Questions
- Are the results exact?
- Maths calculations are exact. Cost calculations depend on the prices and usage you enter.
- Do the date calculators handle leap years?
- Yes. They use real calendar dates.
- Can I suggest a calculator?
- Yes. Use the contact page to request one.
Guides
- Using a Percentage Calculator in Australia: A Step-by-Step Guide
Solves the most common percentage questions in one place. Includes the formula, a worked example with Australian figures and tips.
- Common Percentage Mistakes (and a Better Way)
Common mistakes when working out percentage in Australia, and how to get a result you can rely on.
- Fuel Cost Calculator Explained for Australians
Calculates the fuel cost of a road trip or commute. Includes the formula, a worked example with Australian figures and tips.
- Fuel Cost Mistakes Australians Make and How to Avoid Them
Common mistakes when working out fuel cost in Australia, and how to get a result you can rely on.
- How the Electricity Cost Calculator Works (With a Worked Example)
Works out how much an appliance costs to run. Includes the formula, a worked example with Australian figures and tips.
- Getting the Most From a Electricity Cost Calculator: Tips and Common Errors
Common mistakes when working out electricity cost in Australia, and how to get a result you can rely on.
- Solar Payback Calculator: Formula, Example and What the Result Means
Estimates how long a rooftop solar system takes to pay for itself. Includes the formula, a worked example with Australian figures and tips.
- Solar Payback: What to Check Before You Trust the Number
Common mistakes when working out solar payback in Australia, and how to get a result you can rely on.
- Using a Age Calculator in Australia: A Step-by-Step Guide
Calculates exact age in years, months and days. Includes the formula, a worked example with Australian figures and tips.
- Common Age Mistakes (and a Better Way)
Common mistakes when working out age in Australia, and how to get a result you can rely on.
- Days Between Dates Calculator Explained for Australians
Counts the days, weeks and weekdays between two dates. Includes the formula, a worked example with Australian figures and tips.
- Days Between Dates Mistakes Australians Make and How to Avoid Them
Common mistakes when working out days between dates in Australia, and how to get a result you can rely on.