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Percentage Increase Calculator

Use this free online percentage increase calculator to find how much a value has grown. Enter the old and new values to instantly calculate the percentage change between them.

Enter Values

Old Value

The original or starting value

New Value

The final or current value

Result

Enter values above and click Calculate to see your result.

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Formula

Percentage Increase = ((New - Old) / Old) × 100

Subtract the old value from the new value, divide by the old value, and multiply by 100.

Worked Example

Old value: 80, New value: 100 Step 1: Difference → 100 - 80 = 20 Step 2: Divide by old → 20 / 80 = 0.25 Step 3: Multiply by 100 → 0.25 × 100 = 25% Result: 25% increase.

What Is Percentage Increase?

Percentage increase measures how much a value has grown relative to its original amount, expressed as a percentage. It is one of the most commonly used calculations in business, finance, and everyday life for tracking growth over time.

A salary going from $50,000 to $55,000 is a 10% increase
A stock price rising from $100 to $150 is a 50% increase
Percentage increase always uses the original (old) value as the base for comparison
If the new value is smaller, the result is negative, indicating a decrease instead

Understanding percentage increase is essential for evaluating salary raises, investment returns, price changes, population growth, and business KPIs like revenue growth or customer acquisition.

You can also calculate changes using our Percentage Calculator, Percentage Decrease Calculator or Percentage Difference Calculator.

Frequently Asked Questions

What does percentage increase mean?

It measures how much a value has grown relative to its original amount, expressed as a percentage. For example, going from 200 to 250 is a 25% increase because the growth (50) is 25% of the original value (200).

Can percentage increase be negative?

If the new value is less than the old value, the result is negative. That technically represents a percentage decrease. Use a percentage decrease calculator for a positive result in that case.

How is percentage increase used in business?

It is used to measure revenue growth, price changes, customer base expansion, and many other KPIs. Year-over-year (YoY) growth is one of the most important business metrics.

What is the difference between percentage increase and percentage points?

A percentage increase is relative to the starting value. Percentage points measure the absolute difference between two percentages. For example, going from 10% to 15% is a 5 percentage point increase, but a 50% relative increase.

How do I calculate year-over-year growth?

Use the same formula with last year as the old value and this year as the new value. For example, if revenue went from $1M to $1.3M, the YoY growth is ((1.3M - 1M) / 1M) x 100 = 30%.

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