Everyday Tools Calculators
Focused tools for percentage questions and number rounding, with the relevant method shown beside each result.
Choose the calculation that matches the question before entering values: a percentage of a number, one value as a percentage of another and relative percentage change are different operations. Keep the original unrounded value until the final step, then use the rounding tool only at the precision the task requires.
How to use these calculators well
- Identify whether the question involves a percentage, percentage change or percentage points.
- Keep input units consistent and delay rounding until the final result.
- Use the displayed method to reproduce the answer independently.
Percentage Calculator
Work out a percentage of a number, percentage change, an increase or decrease by a percentage, and what percent one number is of another.
Open calculatorRounding Calculator
Round positive or negative numbers to a chosen number of decimal places. See the rounded value and method instantly with a clear worked result.
Open calculatorReverse Percentage Calculator
Find an original value before a percentage increase or decrease, including discounts and increases above 100%. See the change amount instantly.
Open calculator