Percentage Increase Calculator
To increase a number by a percentage, multiply the number by (1 + percent ÷ 100): new value = value × (1 + percent ÷ 100).
Last updated 2026-08-14
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quizExample
How this calculator works, with real numbers (no JavaScript needed):
Inputs
- Original number
- 20000
- Increase by
- 10
Results
- New value
- 22,000
- Amount of increase
- 2,000
functionsThe formula
A percentage increase answers "what does the number become after going up by X%?" — a salary raise, a price rise, a markup, or a fee increase.
The formula
New value = value × (1 + percent ÷ 100)
You can think of it in two steps: find the increase, then add it to the original.
Worked example
₹20,000 increased by 10%:
Increase = 20,000 × 10 ÷ 100 = ₹2,000
New value = 20,000 + 2,000 = ₹22,000
Using the one-line formula: 20,000 × 1.10 = ₹22,000.
Why 1 + percent ÷ 100?
"Add 10%" means "keep 100% and add another 10%" — that's 110% of the original. Since 110% as a decimal is 1.10, you simply multiply by 1.10. Add 25% → multiply by 1.25; add 5% → multiply by 1.05.
Everyday uses
- Salary increase — a 12% raise on ₹50,000 becomes 50,000 × 1.12 = ₹56,000
- Price rise — an item at ₹1,200 going up 8% becomes ₹1,296
- Markup — a retailer adding 20% to a ₹500 cost price sells at ₹600
- Rent, fees, taxes — any "plus X%" situation
Want the reverse — take a percentage off? See the percentage decrease calculator.
helpFrequently asked questions
question_markHow do I add a percentage to a number?
Multiply the number by (1 + percent ÷ 100). For example, adding 10% to 20,000 gives 20,000 × 1.10 = 22,000.
question_markWhat is a 12% increase on 50,000?
50,000 × 1.12 = 56,000. The increase is 6,000 and the new value is 56,000.
question_markWhat is the formula for percentage increase?
New value = original × (1 + percent ÷ 100). The increase itself is original × percent ÷ 100.