Age calculator
Your exact age on any date, from your DOB.
Open toolPercentage calculator
Calculate a percentage, share or change.
YOUR RESULT—
Fill in your details and calculate.
A little less working out. Your input stays in this browser. No account needed.
THE QUICK GUIDE
How to use percentage calculator
Choose a calculation, enter both values, and calculate.
How it works
Percent of: value × percentage ÷ 100. Share: part ÷ total × 100. Change: (new − old) ÷ old × 100.
A useful example
15% of 200 is 30. A change from 100 to 120 is a 20% increase.
Good to know
A zero denominator has no defined percentage result.