Enter any two values and the third calculates itself.
What is X increased by Y%?
Enter two values above to see the step-by-step calculation.
You've got two numbers and you need to know how much one went up compared to the other. Maybe it's a raise your boss just offered, or a price tag that looks higher than you remember. This percentage increase calculator gives you the answer the moment you type — no buttons, no waiting. Just plug in the original value and the new value, and the percentage fills itself in.
The math isn't complicated once you see it laid out. Take the new number, subtract the old number, divide that difference by the old number, and multiply by 100. That's it. The formula looks like this: ((New − Old) / Old) × 100%. The percentage increase calculator above runs this formula every time you change a digit, and it shows you each step so you can follow along or drop it straight into a report.
Your monthly rent was $1,200 and just went up to $1,380. The increase is $180, and $180 divided by $1,200 is 0.15, which means a 15% increase. You can type those numbers into the percentage increase calculator to double-check, or try it with your own figures — the result updates before you even finish typing.
One of the most common reasons people look for a percentage increase calculator is to make sense of a job offer. If you're earning $55,000 and the new offer is $62,000, that's a 12.7% raise — but is it enough to offset a longer commute? Enter the numbers above to see for yourself. This also works as a salary increase percentage calculator for annual reviews, where HR gives you a percentage and you need the dollar figure.
Same idea applies to hourly pay. If your rate goes from $18 to $21, that's a 16.7% bump. Anyone working part-time or gig jobs can use this percentage increase calculator to compare offers across different platforms, especially when the numbers aren't round.
Groceries, rent, subscriptions, raw materials — prices go up all the time. A percentage increase calculator puts the number in context. Milk going from $3.49 to $4.19 doesn't sound dramatic until you realize that's a 20% jump. Business owners tracking supplier cost increases use the same formula to decide whether to absorb the hit or adjust their own prices.
If you're watching a subscription creep up quarter after quarter, you can use this as a monthly percentage increase calculator to track the trend over time. Comparing January's bill to March's bill, or this year's total to last year's, becomes a lot clearer in percentage terms than in raw dollars.
Investors compare portfolio returns in percentages because raw dollar amounts don't tell the whole story. A $5,000 gain on a $50,000 portfolio is 10% — solid. The same $5,000 on a $500,000 portfolio is only 1%. This percentage increase calculator works for stock prices, fund performance, and real estate too. If you bought a house for $320,000 and it's now appraised at $385,000, that's a 20.3% increase in property value — useful to know for refinancing or tax planning.
Not every change goes up. If the new value is smaller than the original, the result comes back negative and the display switches to red. Going from 500 to 400 gives you −20%, meaning a 20% decrease. You don't need a separate percentage increase/decrease calculator — this one handles both directions automatically. It also works as a percentage change calculator for any scenario where you just need to know the difference between two figures.
Most tools only go one direction: you give two values, you get the percentage. This percentage increase calculator lets you fill in any two of the three fields and solves for the missing one. Know the original and the percentage but not the new value? Enter those two and the calculator fills in the rest. Need to work backward from a result to find the starting number? That works too.
When an interest rate moves from 3% to 5%, that's a 2 percentage point increase but a 66.7% increase in the rate itself. News headlines mix these up constantly. If a number sounds surprisingly large or small, run it through a percentage increase calculator to see what it actually means.
A 50% increase followed by a 50% decrease doesn't bring you back to where you started. Going from 100 to 150 is +50%, but 150 down to 75 is also −50% — yet you end up at 75, not 100. The base shifts each time, which is why the percentage increase calculator shows the absolute difference alongside the percentage.
Subtract the original from the new value, divide by the original, multiply by 100. Or type both numbers into the percentage increase calculator above and skip the math entirely.
"Increase" implies the value went up. "Change" is neutral — it covers both up and down. This tool works either way: green for increases, red for decreases.
Yes. If the new value is lower, the percentage increase calculator returns a negative result and labels it as a decrease automatically.
Multiply the original by (1 + percent / 100). A $200 item with a 15% increase becomes $200 × 1.15 = $230. The "Quick: Value + Percent" section above does this for you.
It handles any size — from a $0.46 per-item price increase to comparing figures in the lakhs or millions. The formula is the same regardless of scale.