Calculate percentages instantly with five different calculators. Find percentage of a number, percentage change, percentage increase/decrease, reverse percentages, and what percent one number is of another — free, no signup required.
| Percentage | Fraction | Decimal | Example (of 100) |
|---|---|---|---|
| 1% | 1/100 | 0.01 | 1 |
| 5% | 1/20 | 0.05 | 5 |
| 10% | 1/10 | 0.10 | 10 |
| 20% | 1/5 | 0.20 | 20 |
| 25% | 1/4 | 0.25 | 25 |
| 33.33% | 1/3 | 0.333 | 33.33 |
| 50% | 1/2 | 0.50 | 50 |
| 66.67% | 2/3 | 0.667 | 66.67 |
| 75% | 3/4 | 0.75 | 75 |
| 100% | 1/1 | 1.00 | 100 |
| 150% | 3/2 | 1.50 | 150 |
| 200% | 2/1 | 2.00 | 200 |
Five calculators in one — solve every percentage problem instantly with step-by-step formulas.
Find what a specific percentage equals. Perfect for calculating tips, discounts, taxes, and commissions on any amount.
Calculate the percentage increase or decrease between two values. Essential for tracking growth, price changes, and performance metrics.
Determine what percentage one number represents of another. Useful for test scores, completion rates, and proportion analysis.
Find the original number when you know a percentage of it. Critical for calculating pre-tax amounts and original prices from discounts.
Apply a percentage increase or decrease to any number. Shows both the increased and decreased values simultaneously.
Built-in common percentages table with fractions and decimals. Instant reference for the most frequently used percentage values.
Use the formula: (Percentage ÷ 100) × Number. For example, to find 25% of 200: (25 ÷ 100) × 200 = 0.25 × 200 = 50. This calculator does this instantly — just enter the percentage and the number, and the result appears. This is the most common percentage calculation used for tips (15-20%), discounts (10-50% off), and tax calculations.
Use the formula: ((New Value − Original Value) ÷ |Original Value|) × 100. If a stock goes from $100 to $125: ((125 − 100) ÷ 100) × 100 = 25% increase. If it drops from $200 to $150: ((150 − 200) ÷ 200) × 100 = -25% decrease. The calculator uses absolute value for the denominator to handle negative numbers correctly. This is commonly used for investment returns, price changes, and growth metrics.
A reverse percentage finds the original number before a percentage was applied. Formula: Number ÷ (Percentage ÷ 100). For example, if you know that 80 is 25% of the original: 80 ÷ (25 ÷ 100) = 80 ÷ 0.25 = 320. This is essential for: finding original prices from sale prices (e.g., $80 after a 20% discount means the original was $100), calculating pre-tax amounts, and working backward from partial data.
Use the formula: (Part ÷ Whole) × 100. For example, if you scored 45 out of 60 on a test: (45 ÷ 60) × 100 = 75%. If 30 out of 50 people prefer option A: (30 ÷ 50) × 100 = 60%. This calculation is widely used for test scores, survey results, completion rates, and any situation where you need to express a part-to-whole relationship as a percentage.
Percentage points refer to the absolute difference between two percentages. Percent refers to a relative change. Example: If interest rates rise from 4% to 5%, that's an increase of 1 percentage point (absolute), but a 25% increase (relative: (5-4)/4 × 100). This distinction is critical in finance, economics, and statistics — confusing them can lead to significant misunderstandings in news reports and data analysis.
Five percentage calculators in one tool — free, instant, no signup required.
🔢 Calculate PercentagesNote: All calculations are performed locally in your browser. Results are rounded for display but calculated with full precision. For financial decisions, always verify critical calculations independently.