Percentage Calculator: Calculate Percentages Instantly | Free
1 usesWhat is X% of Y?
What is
% of
= 50
X is what % of Y?
is what % of
= 25%
Percentage Change
From
to
= +50%
Increase / Decrease by %
+
% = 230
−
170
Percentage Calculator Tips
4 Calculation Modes
Find X% of Y, what percent X is of Y, percentage change between two values, and increase/decrease by percentage.
Instant Results
Results update automatically as you type — no need to click a button. Perfect for quick calculations.
Common Use Cases
Sales tax, discounts, grade calculations, financial analysis, tip calculations, and statistical analysis.
No Signup Needed
Completely free, works instantly in your browser. No ads, no registration.
Frequently Asked Questions
How do I calculate percentage of a number?
Use the first calculator: enter the percentage and the number. For example, 25% of 200 = 50.
How do I find what percentage one number is of another?
Use the second calculator: enter both numbers. For example, 50 is 25% of 200.
How do I calculate percentage change?
Use the third calculator: enter the old and new values. For example, from 100 to 150 = +50% change.
Is this percentage calculator free?
Yes, completely free with no limits.
How do I quickly calculate a new price after adding tax or applying a discount percentage?
Our free percentage calculator has a specific function for this. Simply input your original price and the percentage you wish to add (like sales tax) or subtract (like a discount). The tool will instantly provide the final value, making it easy to see the exact amount after an increase or decrease. This helps with budgeting and smart shopping decisions.
How can I calculate the original price or value before a percentage increase or decrease?
Although our calculator doesn't have a specific "reverse percentage" function, you can effectively determine the original value using the "increase/decrease by percent" tool. For instance, if an item now costs $90 after a 10% discount, you know $90 represents 90% of the initial price. By entering different starting amounts and decreasing by 10%, you can quickly find the original price of $100. This method works for both increases and decreases.
How to Use the Percentage Calculator
- Choose the calculation type you need
- Enter your numbers in the input fields
- Results appear instantly as you type
- Use for taxes, discounts, grades, and more