Percentage Calculator

Math

Percentages, increases, decreases & 'what percent' math.

What do you want to find?

Percentage15 %

Of value

15% of 1,200

180

Percentage: 15%
Of total: 1,200
Result: 180

About the percentage calculator

A percentage calculator handles the three most common percentage questions in one place: what is X% of a number, what percentage one number is of another, and the percentage increase or decrease between two values.

The three modes

% of value: result = (percent / 100) × value. Example: 15% of 1,200 = 180.
X is what %: percent = (part / whole) × 100. Example: 45 out of 180 = 25%.
% change: change = ((new − old) / old) × 100. Example: 200 → 250 = +25%.

Everyday uses

Work out discounts, tips and tax.
Convert exam marks into percentages.
Track salary hikes or price changes.
Compare growth between two figures.

Frequently asked questions

How do I calculate a percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 15% of 1,200 = 1,200 × 15 ÷ 100 = 180.

How do I work out percentage increase or decrease?

Subtract the original value from the new value, divide by the original, then multiply by 100. A positive result is an increase; a negative result is a decrease.

Keep going - these pair well with what you just calculated.