100 to 120 is a 20% increase.
Workplace
Percentage Increase/Decrease Calculator
Calculate the percentage change from an original value to a new value. Get an instant result with no signup.
Free calculator
Enter your details
Your result will appear here
Complete the fields and select “Calculate result.” Your values stay in this browser.
When to use this calculator
Use this general comparison when you know an original and a new value and need the relative increase or decrease. It is useful for salary, rate, budget or workload comparisons as long as both figures measure the same thing in the same unit.
Formula
The calculator uses this formula:
Percentage change = (New − Original) ÷ |Original| × 100
Figures are rounded for display. Calculations use the full entered values.
Worked examples
80 to 60 is a 25% decrease.
What your result means
The calculator subtracts the original value from the new value and divides by the original. A positive percentage is an increase and a negative percentage is a decrease; the direction depends on the order of the two inputs.
Common mistakes to avoid
- Reversing the original and new values.
- Using zero as the original value, which makes relative change undefined.
- Comparing figures with different units, periods or definitions.
Assumptions and limitations
- Both values are directly comparable.
- The original value is greater than zero.
- The result describes relative change only and does not explain its cause or practical significance.
Read how PixelDock calculators handle formulas, dates, rounding and privacy.
Frequently asked questions
Is the percentage increase/decrease calculator accurate?+
It uses the values you enter and the formula shown below. Results are estimates and do not include taxes, deductions, or employer-specific rules.
Is my salary information stored?+
No. Calculations happen in your browser and the values you enter are not sent to our servers.
Can I use a different currency?+
Yes. The currency selector changes formatting; the underlying arithmetic is the same.