Percentage calculator

Percentages without looking up formulas: pick what you want to know, fill the numbers into the sentence – the result and the working appear right below.

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How it works

1

Pick a question

Percentage of, what percent, base value, increase, discount, change or original value – every question is written as a sentence.

2

Enter the numbers

Decimal point or comma both work, thousands separators are fine. The result updates as you type.

3

See the working

Below the result you see the calculation with your numbers and the formula – handy for school and training.

Frequently asked questions

How do I calculate a percentage?+

Part = base × percent ÷ 100. Example: 19% of 250 is 250 × 19 ÷ 100 = 47.5. The other way round, percent = part ÷ base × 100 and base = part × 100 ÷ percent.

How do I calculate a percentage change?+

Change in % = (new value − old value) ÷ old value × 100. A price going from 80 to 100 is +25%. Falling from 100 to 80 is −20% – the direction matters.

How do I reverse an increase or a discount?+

Divide by (1 + percent ÷ 100) to get the original value: 119 after a 19% increase was 119 ÷ 1.19 = 100 before. For a discount use a negative percentage, e.g. −20%.

What is the difference between percent and percentage points?+

If an interest rate rises from 2% to 3%, that is 1 percentage point more – but 50 percent more, because 1 is half of 2. Percentage points describe the gap between two percentages.

Can I calculate VAT too?+

Yes, with “Increase” (net + 19%) and “Original value” (gross back to net). For gross/net with all rates in Germany, Austria and Switzerland there is a separate VAT calculator.