Calculate the percentage increase or decrease between any two values. Shows direction, formula, and multiplier instantly.
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Percentage Change Calculator
Calculate the percentage increase or decrease between any two values. Shows direction, formula, and multiplier instantly.
Results
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Increase
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Original
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New Value
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Absolute Change
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Multiplier
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Formula Used
% Change = (New − Original) ÷ |Original| × 100
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What Is Percentage Change?
Percentage change measures how much a value has increased or decreased relative to its original value. It's used everywhere in business: revenue growth, price changes, inventory fluctuations, margin improvements, and year-over-year performance comparisons.
The key distinction from percentage increase (which only calculates increases) is that percentage change works in both directions — it tells you whether a change is an increase (positive) or a decrease (negative), and by exactly how much.
📊 Real Business Example
Your business had $340,000 in revenue last year and $412,000 this year.
Percentage Change: +21.2% — a healthy growth rate well above the typical 10% benchmark.
If revenue dropped from $412,000 to $340,000, the change would be -17.5% — the calculator handles both directions.
How to Use This Calculator
Enter the original value — the starting point (last year's revenue, old price, previous month's units).
Enter the new value — the current or ending figure.
The calculator instantly shows percentage change with direction indicator, absolute change, and the multiplier factor.
Use the formula shown to verify the math or include it in a report.
Frequently Asked Questions
Percentage Change = (New Value − Original Value) / |Original Value| × 100. The result is positive for increases and negative for decreases. Using the absolute value of the original prevents sign errors when working with negative numbers.
Percentage change works in both directions — it shows increase (+) or decrease (−). Percentage increase only applies to situations where the value went up. For a decrease, you'd use 'percentage decrease.' Percentage change is the universal formula that covers both.
Use the same formula: (This Year − Last Year) / Last Year × 100. Example: Revenue went from $280K to $340K. Growth = ($340K − $280K) / $280K = $60K / $280K = 21.4%.
Division by zero is mathematically undefined. If your original value is zero, percentage change cannot be calculated. This comes up when a new product launches (revenue goes from $0 to some amount). In that case, report absolute growth instead.
Yes. If something doubled, the percentage change is 100%. If it tripled, it's 200%. There's no upper limit. A value going from $10 to $150 is a 1,400% change.
Percentage change measures the total change between two points regardless of time. CAGR (Compound Annual Growth Rate) shows the equivalent steady annual growth rate over multiple years. For multi-year analysis, CAGR is more useful. For a single period comparison, percentage change is the right tool.
Percentage change is used in virtually every business metric: revenue growth, expense tracking, margin improvement, headcount changes, customer growth, price adjustments, and comparing performance across time periods.
For small businesses: 10-15% year-over-year is considered healthy growth. Startups might target 50-100%+ early on. Mature businesses in stable industries might see 3-5%. Compare your growth rate to industry averages and your own historical trend.