Percentage Calculator
A straightforward percent calculator for the five questions people ask most: percentage of a number, percentage increase, percentage decrease, percentage difference and percentage change. Every field updates in real time and shows the numbers behind the result. See how percentage calculators work, or jump to the tip calculator and unit converter for everyday math.
Last updated July 15, 20263 min read
%
Result
30
How to calculate a percentage
- 1
Pick the calculation
Choose the tab that matches your question.
- 2
Type your numbers
Results update instantly — no submit button.
- 3
Copy or share
Grab the answer and move on with your day.
Benefits
- Covers all five common percentage questions in one place.
- Real-time results, no waiting or reloading.
- Works offline — completely client-side.
- Mobile-friendly numeric inputs.
Common uses
- Sales, discounts, and markup calculations
- Tips and taxes
- Analyzing month-over-month growth or decline
- Grade calculations and test scoring
Frequently asked questions
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