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Percentage Calculator

Calculate percentages with 6 modes: basic percentage, what %, percentage change, discount, tip calculator, and profit margin.

6 Modes Instant Copy Results
Percentage Calculator
Result
100
20% of 500 = 100
Recent Calculations
Calculations will appear here automatically.
Formulas
X% of Y
result = (X / 100) × Y
% Change
change = ((new - old) / old) × 100
Profit Margin
margin = ((sell - cost) / sell) × 100
Markup
markup = ((sell - cost) / cost) × 100
Quick Reference
• 1/4 = 25%
• 1/3 = 33.33%
• 1/2 = 50%
• 2/3 = 66.67%
• 3/4 = 75%
• To convert decimal to %: multiply by 100
• To convert % to decimal: divide by 100

This percentage calculator handles all common percentage operations in one place. Calculate what percentage one number is of another, find a percentage of a given number, determine percentage increase or decrease between two values, and work out the original value from a percentage result. The tool provides instant answers with clear explanations of the formula used, making it educational as well as practical. Students, shoppers comparing prices, business owners calculating margins, and anyone who encounters percentage problems in daily life will appreciate having all these calculations accessible from a single, clean interface.

Frequently Asked Questions

What percentage calculations are supported?
AfroTools Percentage Calculator supports six modes: X% of Y (basic percentage), X is what % of Y, percentage change between two values, discount calculator, tip calculator with bill splitting, and profit margin/markup calculator.
Is the percentage calculator free to use?
Yes, completely free with no sign-up, no ads, and no limits. All six calculation modes are available to everyone at no cost.
Does the calculator save my calculations?
The calculator keeps a session history of your recent calculations for easy reference. This history is only stored in your current browser session and is cleared when you close the tab. Nothing is saved to any server.
Can I use the percentage calculator for business calculations?
Yes. The tool includes a dedicated profit margin and markup calculator that computes margin percentage, markup percentage, gross profit, and gross margin from cost and selling prices. The discount and tip modes are also useful for business scenarios.