Percentage Calculator
Percentages appear everywhere: shopping discounts, salary raises, commissions, taxes, and statistics. This calculator has three modes to solve the most common cases: calculate what a percentage of a number is, find what percentage one number represents of another, and apply a percentage increase or decrease to any value.
The result updates automatically.
Result
Percentage
Final value
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How it works
Mode 1 — X% of Y: result = Y × (X / 100). Mode 2 — X is what % of Y: result = (X / Y) × 100. Mode 3 — Increase/Decrease: final value = Y × (1 + X/100) for increases, Y × (1 − X/100) for decreases. All three modes use direct arithmetic with no approximation.
Publicidad
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Preguntas frecuentes
- How do I calculate X% of a number?
- Multiply the number by X and divide by 100. For example, 15% of $2,000 = 2,000 × 15 / 100 = $300. In this calculator, select Mode 1, enter 15 in the percentage field and 2000 in the value field.
- How do I find what percentage X is of Y?
- Divide X by Y and multiply by 100. For example, if you sold 45 out of 180 products, the percentage sold is (45/180) × 100 = 25%. Use Mode 2 of this calculator.
- How do I calculate a discount?
- A 30% discount on $1,500 is calculated as 1,500 × (1 − 0.30) = $1,050. You can also calculate the discount amount: 1,500 × 0.30 = $450. Mode 3 of this calculator shows both values automatically.
- How do I calculate a salary or price increase?
- A 20% increase on $50,000 results in 50,000 × 1.20 = $60,000. The difference is $10,000. Use Mode 3 with a positive percentage.
- How do I calculate the pre-tax price if I know the price with tax?
- If the price including 10% sales tax is $110, the pre-tax price is 110 / 1.10 = $100. You can also use Mode 2: the tax amount ($10) is X% of $100, result: 10%.