Percentage Calculator
Solves the most common percentage questions in one place.
Your result
Estimate only. Results update as you type.
How this calculator works
Percentage = value ÷ total × 100. Increase = total × (1 + p ÷ 100). Decrease = total × (1 − p ÷ 100).
Worth knowing
A 10% rise followed by a 10% fall leaves you 1% behind where you started.
Guides for this calculator
- Using a Percentage Calculator in Australia: A Step-by-Step Guide
- Common Percentage Mistakes (and a Better Way)
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.
This calculator gives general estimates using published Australian rates and formulas. It doesn’t consider your personal circumstances. Check current figures with the ATO, your state government or a qualified professional before making decisions. See our disclaimer.