Percentage Calculator
Free percentage calculator online. Calculate percentage increase, percentage difference, decrease, and profit margin instantly — results update as you type.
About this tool
Find percentages, increases, decreases, and differences between values quickly and easily. Perform percentage calculations with speed and precision using our free tool. Calculations are processed in real-time as you enter values, with results displayed automatically on the screen.
Features
How to use
Choose Calculation
Select the calculation mode that fits your needs from the 7 available options.
Enter Values
Input your numbers into the corresponding fields. No need to click calculate.
Get Results
The result is calculated instantly and displayed on the screen as you type.
Use Cases
- Calculating restaurant tips easily.
- Finding out how much you save on sales and promotions.
- Calculating product selling prices with profit margins.
- Analyzing business growth rates and performance variations.
Practical Examples
Calculating a Salary Raise
Your current salary is $4,000 and you received a 12% raise. Use the 'Increase by' calculator: enter 4000 and 12% to instantly see your new salary of $4,480.
Finding the Price After a Discount
A $250 jacket is on sale for 30% off. Use the 'Decrease by' calculator: enter 250 and 30% to get the discounted price of $175 — saving you $75.
Setting a Price with Profit Margin
Your product costs $80 to make and you want a 40% profit margin. Use the profit margin calculator: enter 80 as cost and 40% as margin to get the correct sale price of $133.33.
Comparing Sales Growth
Revenue went from $18,000 last quarter to $22,500 this quarter. Use the 'Difference between' calculator to instantly see a +25% growth rate.
Finding the Original Price Before a Discount
You paid $85 for a jacket that was 15% off. Since $85 is 85% of the original price, use the 'X is Y% of how much' calculator: enter 85 as the value and 85 as the percentage. The original price was $100.
Questions & Answers
Percentage decrease calculates a discount on a starting value (e.g., 20% off $100). Percentage difference compares two independent numbers to show the relative change between them.
It uses your cost price and desired margin to find the final sale price, ensuring the specified percentage of the sale price is your actual profit.
Yes! Our calculator fully supports decimal values for both base numbers and percentages, giving you precise results for complex calculations.
Use the 'Difference between' calculator. Enter the starting value and the final value — the tool automatically shows the relative change with a +/- sign to indicate increase or decrease.
Use the 'X is Y% of how much' calculator. If an item has a 15% discount, the sale price is 85% of the original. Enter the sale price and 85 as the percentage to instantly find what it cost before the discount.
Yes. Calculate the first result normally, then use that result as the base for the second calculation. For example, to find 10% of 20% of $500: first calculate 20% of 500 to get $100, then find 10% of $100 to get $10.
It depends on the industry. Retail typically targets 10–20%, software and digital products can reach 60–80%, and services usually fall between 20–40%. Use the profit margin calculator to find the exact sale price for any margin goal.