Percentage Increase Calculator
Find the percentage increase (or decrease) between two numbers instantly: (new − old) ÷ old × 100. Handles decreases, negative results, and zero baselines correctly.
From paycheck raises to price hikes, the question is always the same: by what percent did the number move? The formula is (new − old) ÷ old × 100, but the edge cases trip people up — a decrease should report as a negative change, and a jump from a smaller base produces a deceptively large percentage.
Enter the starting value and the new value and get the percent change, the absolute difference, and a plain-English reading (increase, decrease, or no change). It also runs the reverse direction: apply a percentage to a base and see the resulting value.
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Percentage Calculator
Four percentage questions, one tool — of, is-what-percent, change, and reverse.
Multiply the base value by the percentage, then divide by 100.
What is 15% of $200?
- Multiply:200 × 15 = 3,000
- Divide by 100:3,000 ÷ 100
- Answer:$30
Percentage arithmetic is exact within double-precision floating point. Percentage change uses the absolute value of the original as the base — the standard convention in finance and statistics.
About this percentage increase calculator
This page covers percent change calculator, calculate percentage increase between two numbers, percentage decrease calculator, raise percentage calculator — all the same underlying task as percentage increase calculator. The tool above is FreeToolHub's percentage calculator embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Related pages
- Percent Off Calculator — percent off calculator
Frequently asked questions
How do I calculate percentage increase?
Subtract the old value from the new value, divide by the old value, and multiply by 100. Going from $50,000 to $58,000 is (58,000 − 50,000) ÷ 50,000 × 100 = 16% raise. If the new value is smaller, the result is a negative percentage — a decrease.
Why is a 50% decrease not undone by a 50% increase?
Percentages apply to different bases. A 50% drop from $100 leaves $50; a 50% increase on $50 brings you back to $75, not $100. To recover the original you need a 100% increase. The calculator always states which base it is using, so this trap is easy to spot.