Age Calculator
Find an exact age in years, months and days.
Use ToolWork out percentages in three different ways — a percentage of a number, one number as a percentage of another, and the change between two values. Results update as you type.
Result
200
25% × 800 ÷ 100 = 200
A percentage is simply a fraction of one hundred. To find X percent of a number you multiply the number by X and divide by 100, which is what the first tab does for you.
The second tab answers the reverse question: what share one value represents of another. The third tab compares an old and a new value and reports the increase or decrease as a percentage, which is how discounts, price rises and growth rates are normally described.
Discounts, shares and percentage change without switching tools.
Nothing to submit — the answer updates with every keystroke.
No account, no sign-up and no daily cap — use it as often as you need.
The layout, buttons and inputs are built mobile-first and are fully keyboard accessible.
Find an exact age in years, months and days.
Use ToolEstimate monthly loan instalments and total interest.
Use ToolAdd or remove GST from any amount.
Use ToolBrowse every calculators or see the full tool list.