Percentage Increase Calculator

You want a fast way to see how much something grew. The Percentage Increase Calculator does the math in one shot so you don’t fiddle with spreadsheets or second-guess the formula. Enter the original value and the new value. You’ll get the absolute change, the percent increase, and the growth factor that tells you how many times larger the new value is.

Formula you’ll use every time:
Percentage increase = ((new − original) ÷ original) × 100. This is the standard “percent change” definition across math and finance texts.

Why it matters: percentage increase compares change relative to the starting point. You read trend strength at a glance and you can compare apples to apples across prices, salaries, traffic, or production runs. That’s why education sites and finance references teach the same structure - find the difference, divide by the original, then multiply by 100.

What you can do with a Percentage Increase Calculator

• Price moves: Check if a product’s price rose 12% or 18% after a promotion ends. Guidance on percent change appears in many investing primers as the go-to way to report gains.

• Marketing lift: Measure week-over-week session growth or a click-through bump after a new CTA.

• Operations: Quantify throughput gains on a line upgrade or defect reductions after a process tweak.

• Personal finance: Track how a savings balance climbed this month and note the one-period return. For context, many sources define percent change for markets with exactly the same formula you see above.

Quick sanity check

If the original value was 80 and the new value is 100, the calculator shows:

• Change: 20

• Percent increase: (100−80)/80×100=25%(100 − 80)/80 × 100 = 25%(100−80)/80×100=25%

• Growth factor: 100/80=1.25×100/80 = 1.25×100/80=1.25×

What Is Percentage Increase? - Understand it before you calculate

When a number grows, you want a single figure that tells you how much bigger the new value is compared to the original. That’s percentage increase in plain English. You compare the change to the starting point, then express that relationship as a percent so anyone can read it at a glance.

Definition:
Percentage Increase = ((new − original) ÷ original) × 100

Percentage Increase vs Percent Change vs Percentage Points

People often use percentage increase and percent change as the same idea. Both compare the difference to the original value. Percentage points describe the gap between two rates like 4% and 5% which is +1 percentage point not +1%. That distinction matters when you talk about interest rates or conversion rates. You avoid confusion when you keep these terms straight.

Variables you’ll see in the Percentage Increase Calculator

• original: the baseline or starting value

• new: the value after change

• change: new − original

• Percent increase: ((new − original) ÷ original) × 100

• Growth factor: new ÷ original (for example, 1.25× means “25% bigger”)

Units: the percent is unitless. The change and the growth factor reflect the domain. If you work with dollars, show the change in USD and keep two decimals for reporting.

How the Percentage Increase Calculator Works

You give the tool two numbers. It returns three clear answers that you can use in reports, dashboards, or quick checks. Everything flows from one simple idea. Find the change. Compare it to the starting point. Express it as a percent.

Inputs

• Original value
  The baseline you compare against. Use the price before a change, the earlier salary, or last week’s traffic.

• New value
  The value after the change. Use the price now, the current salary, or this week’s traffic.
  

Outputs

• Change
  new value − original

• Percentage increase
  ((new value − original) ÷ original) × 100
  

• Growth factor
  new value ÷ original
  A factor of 1.25× means “25% bigger.”

Quick Examples You Can Check by Hand - Percentage Increase Calculator

1. Simple increase (classic use case)

Scenario: A product cost $80 before a price change and now costs $100.

1. Original value: 80

2. New value: 100

3. Change:

   • 100 − 80 = 20

4. Percentage increase:

   • (20 ÷ 80) × 100

   • 0.25 × 100

   • 25%

5. Growth factor:

   • 100 ÷ 80

   • 1.25×

How to read this:
The item is $20 more expensive. That rise equals a 25% increase over the original price of $80. The new price is 1.25 times the old price.

2. No change at all

Scenario: A marketing campaign brought in 250 leads last week and 250 this week.

1. Original value: 250

2. New value: 250

3. Change:

   • 250 − 250 = 0

4. Percentage increase:

   • (0 ÷ 250) × 100 = 0%

5. Growth factor:

   • 250 ÷ 250 = 1.00×

How to read this:
You didn’t grow and you didn’t shrink. The performance is flat. This is often useful in reporting because 0% tells stakeholders “we held ground but didn’t improve.”

3. Decrease (negative percent result)

Even though this is a “percentage increase” calculator, most teams expect it to also show negative movement because that’s how you track drops.

Scenario: A warehouse processed 120 units per hour, then after a slowdown it’s doing 90 units per hour.

1. Original value: 120

2. New value: 90

3. Change:

   • 90 − 120 = −30

4. Percentage increase:

   • (−30 ÷ 120) × 100

   • −0.25 × 100

   • −25%

5. Growth factor:

   • 90 ÷ 120 = 0.75×

How to read this:
Throughput dropped by 25%. The new output is 0.75 times the old output. When a manager says “output is down 25% week-over-week,” this is the math behind that sentence. For reference on interpreting percent change as positive or negative, see standard percent change definitions used in finance and economics.

4. Salary raise example (very common in HR and personal finance)

Scenario: Someone earned $60,000 last year and now earns $66,000.

1. Original salary: 60,000

2. New salary: 66,000

3. Change:

   • 66,000 − 60,000 = 6,000

4. Percentage increase:

   • (6,000 ÷ 60,000) × 100

   • 0.10 × 100

   • 10%

5. Growth factor:

   • 66,000 ÷ 60,000 = 1.10×

How to read this:
That’s a 10% raise. HR and compensation teams often talk in percent language because it normalizes different base salaries. A $6,000 raise on $60,000 is meaningful (10%). A $6,000 raise on $200,000 is only 3%. Same raw increase, very different story.

5. Ad performance / marketing lift

Scenario: A landing page had a click-through rate (CTR) of 4%. After redesign, the CTR is 5%.

Careful here. Two different concepts show up:

• Percentage points: 4% → 5% is an increase of 1 percentage point

• Percent increase:

  • (5 − 4) ÷ 4 × 100

  • 1 ÷ 4 × 100

  • 25%

Both are valid, but they answer different questions:

• “We improved CTR by 1 percentage point.”

• “We improved CTR by 25%.”