Percentage Increase Calculator
Calculate the percentage increase or decrease between two values. Enter your original value and new value to see the exact percentage change instantly.
Increase a Number by Percentage
Calculate what a number becomes after a percentage increase. Enter the starting value and the percentage increase to find the result.
Find Original Value Before Increase
If you know the final value after an increase, calculate what the original value was. Useful for finding pre-increase prices or original figures.
Whether you are tracking sales growth, price changes, investment returns, or any other metric, understanding percentage increase is essential. This calculator instantly shows you the percentage change between any two values, plus helpful extras like the multiplier and actual difference.
Need to work backwards? Use the second calculator to increase a number by a percentage, or the third to find the original value before an increase. If you only need “what is X% of Y?” or a quick reverse percentage, visit our Percent Calculator.
How to Calculate Percentage Increase
Percentage increase measures how much a value has grown relative to its original amount. The formula is straightforward:
Step-by-step method:
- Subtract the original value from the new value (this gives you the increase)
- Divide the increase by the original value
- Multiply by 100 to convert to a percentage
The price increased by 25%
Percentage Increase Formula
Here are the key formulas you need for percentage increase calculations:
Find Percentage Increase
Find New Value After Increase
Find Original Value Before Increase
Find % increase: 50 to 65
Find new value: 50 increased by 30%
Find original: 65 after 30% increase
How to Calculate Percentage Decrease
Percentage decrease uses the same formula, but the result will be negative (or you can take the absolute value and state it as a decrease):
The price decreased by 25%
A 25% increase followed by a 25% decrease does NOT return you to the original value. If $100 increases by 25% to $125, then decreases by 25%, you get $93.75 – not $100. The percentages are calculated from different bases.
Percentage Increase vs Percentage Points
These terms are often confused but mean very different things:
| Term | Meaning | Example |
|---|---|---|
| Percentage Increase | Relative change from original | 20% to 25% = 25% increase |
| Percentage Points | Absolute difference | 20% to 25% = 5 percentage points |
Percentage point increase: 5% – 4% = 1 percentage point
Percentage increase: ((5 – 4) / 4) x 100 = 25% increase
The rate increased by 1 percentage point, which is a 25% increase.
When news reports say “unemployment rose by 2 percentage points,” they mean the absolute change (e.g., 5% to 7%), not a relative increase.
Percentage Increase Examples
Here are real-world examples showing percentage increase calculations:
Example 1: Salary Raise
You received a 10% raise
Example 2: Stock Price
The stock gained 40%
Example 3: Website Traffic
Traffic increased by 50%
Example 4: Price Decrease
The price dropped by 25%
Example 5: Population Growth
Population grew by 20%
Common Percentage Increases
Here is a quick reference showing what common percentage increases look like:
| % Increase | Multiplier | Example (from 100) |
|---|---|---|
| 5% | 1.05 | 100 becomes 105 |
| 10% | 1.10 | 100 becomes 110 |
| 15% | 1.15 | 100 becomes 115 |
| 20% | 1.20 | 100 becomes 120 |
| 25% | 1.25 | 100 becomes 125 |
| 50% | 1.50 | 100 becomes 150 |
| 75% | 1.75 | 100 becomes 175 |
| 100% | 2.00 | 100 becomes 200 (doubled) |
| 200% | 3.00 | 100 becomes 300 (tripled) |
To quickly calculate a percentage increase, add the percentage to 100 and divide by 100 to get the multiplier. For a 35% increase: (100 + 35) / 100 = 1.35. Multiply any value by 1.35 to increase it by 35%.
Year-Over-Year Percentage Change
Year-over-year (YoY) percentage change compares a value to the same period in the previous year. It is commonly used for:
- Revenue and sales growth
- Stock performance
- Economic indicators (GDP, inflation)
- Website traffic and conversions
Q3 2024: $450,000
Q3 2023: $380,000
Sales grew 18.4% year-over-year
YoY comparisons help eliminate seasonal variations. Comparing December to November is misleading for retail (holiday sales). Comparing December 2024 to December 2023 gives a true growth picture.
Compound Percentage Increase
When percentage increases happen repeatedly (like annual growth), they compound. Each increase is calculated on the new, higher value.
Starting value: $10,000
Total increase: 61.05% (not 50%)
This is why compound growth is so powerful – and why compound interest on debt can be dangerous. Learn more about compound calculations in our percentage calculation guide.
Percentage Increase in Business
Business metrics frequently measured as percentage increases include:
| Metric | What It Measures | Good Target |
|---|---|---|
| Revenue Growth | Sales increase YoY | 10-25%+ annually |
| Customer Growth | New customer acquisition | 15-30%+ annually |
| Traffic Growth | Website visitors | 20-50%+ annually |
| Conversion Rate | Visitors to customers | Any increase is good |
| Average Order Value | Spend per transaction | 5-15%+ annually |
| Profit Margin | Profitability | Steady or increasing |
For profit calculations, try our profit margin calculator. For pricing changes, use our discount calculator.
Frequently Asked Questions
The formula is: Percentage Increase = ((New Value – Original Value) / Original Value) x 100. Subtract the original from the new, divide by the original, and multiply by 100. For example, going from 50 to 75: ((75-50)/50) x 100 = 50% increase.
Multiply the original value by 1.20. For example, $150 with a 20% increase: $150 x 1.20 = $180. Alternatively, find 20% of the value ($150 x 0.20 = $30) and add it to the original ($150 + $30 = $180).
Percentage increase is a relative change, while percentage points is an absolute difference. If interest rates go from 4% to 5%, that is a 1 percentage point increase, but a 25% relative increase (because 1 is 25% of 4). The terms are often confused but mean very different things.
Divide the final value by (1 + percentage/100). If something is now $120 after a 20% increase: $120 / 1.20 = $100 original value. This reverses the multiplication used to apply the increase.
Yes, absolutely. A 100% increase means the value doubled. A 200% increase means it tripled. If something goes from 50 to 200, that is a 300% increase ((200-50)/50 x 100 = 300%). There is no upper limit to percentage increase.
Because the percentages are calculated from different bases. $100 + 50% = $150. Then $150 – 50% = $75 (not $100). The 50% decrease is calculated from the higher $150 value, so you lose more than you gained. To return to the original after a 50% increase, you need a 33.3% decrease.
Use the same formula: ((This Year Value – Last Year Value) / Last Year Value) x 100. For example, if revenue was $800,000 last year and $920,000 this year: (($920,000 – $800,000) / $800,000) x 100 = 15% YoY growth.
It varies by industry and stage. Startups often target 100%+ annual growth. Established businesses typically aim for 10-25% annually. Any consistent growth above inflation (2-3%) means real progress. Compare to industry benchmarks for the most relevant targets.
Related Calculators
Back to Percentage Calculator for more calculation tools.