Increase Calculator

You’ve just received a salary raise from $50,000 to $55,000. Is that a 5%, 10%, or 15% bump? Quickly measuring growth – whether in salary, revenue, or population – can be tricky without the right formula.

Use our free increase calculator to find the exact percentage increase between any two numbers. Simply enter the initial value and the final value, and the tool instantly shows the relative change.

The calculator above compares an original number to a new, larger number and returns the percent growth. Calculations assume both values are positive unless otherwise noted.

What Is the Percentage Increase Formula?

Percent increase measures how much a value has grown relative to its starting point. The formula is:

Percent Increase = ((Final Value − Initial Value) / |Initial Value|) × 100

Where:

• Initial Value – the original number (before the change).
• Final Value – the number after the change.
• |Initial Value| – the absolute value of the initial number (important if you may deal with negative initial values).

For most everyday cases – prices, salaries, populations – the initial value is positive, and you can simplify:

Percent Increase = (Change / Initial Value) × 100

How to Calculate Percentage Increase Step by Step

• Subtract the initial value from the final value to get the absolute increase.
• Divide the absolute increase by the initial value.
• Multiply the result by 100 to express it as a percentage.

Example: a product’s price rises from $40 to $50.

• Change: $50 − $40 = $10
• Division: $10 / $40 = 0.25
• Percentage: 0.25 × 100 = 25% increase

The calculator performs all of these steps automatically.

Real-World Examples

Salary Raise

Old salary: $45,000. New salary: $49,500. Increase: ($49,500 − $45,000) / $45,000 × 100 = 10%. Your purchasing power grew by exactly ten percent.

Price Growth

A service fee increased from $80 to $96. Increase: ($96 − $80) / $80 × 100 = 20%. The price is now a fifth higher than before.

Population Growth

A city’s population grew from 120,000 to 144,000 in five years. Increase: (144,000 − 120,000) / 120,000 × 100 = 20%. The same 20% jump as the price example – demonstrating how percentage comparisons work across different scales.

When Do You Need an Increase Calculator?

• Salary negotiations – measure the real value of a raise.
• Business analytics – track revenue, profit, or customer base growth over time.
• Retail & pricing – quantify price hikes or product cost changes.
• Academic & research – analyze data trends, population studies, or experimental results.
• Personal finance – compare investment returns or living cost increases.

This calculator is for estimation purposes only. For critical financial or business decisions, consult a qualified professional.