A percentage increase calculator compares an original measurement to a larger follow-on value and expresses relative growth as a percent of that original baseline.
Increase % = ((New − Original) ÷ Original) × 100.
Use it when the story is strictly upward—revenue, headcount, or traffic rising from a known baseline.
Related tools: Increase by percentage (rate on one base), Percentage decrease (inverse direction), Percentage change (signed comparison).
🔍 Percentage Increase Calculator
Enter the original and new measurements below; the calculator outputs the percent increase relative to the original baseline.
Percentage Increase
0%
Understanding Percentage Increase
The Formula
Worked example
Step-by-Step Example
Problem: A stock price was $200 and rose to $250. What is the percentage increase?
Original = $200, New = $250
$250 - $200 = $50
$50 / $200 = 0.25
0.25 × 100 = 25%
Common Use Cases
Where teams use this
- Salary Increases: Calculating the percentage of your annual raise.
- Investment Growth: Measuring the performance of stocks or real estate.
- Population growth: Comparing demographic data over different years.
- Business Scaling: Tracking the monthly increase in customer acquisition.
- Inflation reporting: Comparing CPI-printed levels period to period (interpretation still needs index context).
- Web analytics: Sessions growing from a measured baseline to a campaign peak.
Common mistakes
- Wrong base: dividing by the new value instead of the original—swap bases and you accidentally describe markup-style language.
- Percentage vs points: confusing a +1 point move with a +1% relative move on small rates (see percentage points).
- Increase vs change: using this page when the metric can fall—prefer percentage change for signed moves.
- Stacking percents: adding consecutive headline percents instead of multiplying growth factors.
❓ Frequently Asked Questions
How do I calculate percentage increase?
Percentage Increase = ((New Value - Original Value) / Original Value) x 100.
Can a percentage increase be more than 100%?
Yes! If something more than doubles, the increase exceeds 100%. Going from 50 to 150 is a 200% increase.
How do I calculate the new value after a percentage increase?
New Value = Original Value x (1 + Percentage/100).
What happens when the original value is zero or tiny?
Division by a very small baseline explodes the headline percent; treat near-zero baselines as undefined for rate storytelling.
Is percentage increase the same as markup?
No. Increase compares two measurements over time. Markup compares profit to cost on one SKU.
How does this relate to ROI?
ROI is its own ratio of return to investment. Percentage increase only needs old and new values, not invested capital.
🔍 Authoritative References
For more information about percentage change calculations, consult these trusted sources:
- National Council of Teachers of Mathematics - Mathematics education standards
- American Statistical Association - Statistical methodology resources