Percentage Calculator - Calculate Percent Instantly
Use our free percentage calculator to calculate percentages, percentage change, discounts, tips, and profit margins. Enter your values and get instant results with visual charts and step-by-step solutions. Perfect for students, shoppers, business owners, and anyone who needs to calculate percentages quickly and accurately.
Basic Percentage Calculator
Visual Breakdown
Enter values and calculate to see visualization
What is a Percentage Calculator?
A percentage calculator is an essential mathematical tool that helps you quickly calculate percentages in various forms. Whether you need to find what percent of a number is, determine percentage increase or decrease, calculate a discount, figure out a tip at a restaurant, or compute profit margins for your business, our calculator handles it all with visual representations.
The word "percent" comes from the Latin "per centum," meaning "by the hundred." When we say 25%, we mean 25 out of every 100. This percentage formula - dividing by 100 - is the foundation of all percentage calculations. Our calculator automates these calculations and shows you step-by-step solutions so you can understand the math behind the results.
Unlike other percentage calculators, ours includes visual pie charts that break down your calculations visually. This helps you understand proportions at a glance, making it perfect for presentations, reports, or simply better comprehension of the numbers.
How to Calculate Percentages - Complete Guide
What is X% of Y?
The most common percentage calculation.
Formula: (X ÷ 100) × Y
Example: 25% of 200 = (25÷100) × 200 = 50
X is what % of Y?
Find what percentage one number is of another.
Formula: (X ÷ Y) × 100
Example: 50 is what % of 200? = (50÷200) × 100 = 25%
Percentage Increase
Calculate a value after increasing by a percentage.
Formula: Value × (1 + %/100)
Example: 100 + 20% = 100 × 1.20 = 120
Percentage Decrease
Calculate a value after decreasing by a percentage.
Formula: Value × (1 - %/100)
Example: 100 - 20% = 100 × 0.80 = 80
Why Use Our Percentage Calculator?
Visual Charts
See your calculations visualized with pie charts for better understanding of proportions.
Step-by-Step
Every calculation shows the formula and step-by-step solution for learning.
5 Calculators in 1
Basic, Change, Tip, Discount, and Margin calculators all in one tool.
Instant Results
Get answers immediately as you type - no waiting or page reloads.
Mobile Friendly
Works perfectly on phones, tablets, and desktops. Calculate anywhere.
100% Free
No signup, no ads interrupting you, no premium features locked away.
Percentage Calculator Guides
How to Calculate Percentage - Complete Guide
Master percentage calculations with our comprehensive guide covering formulas, examples, and real-world applications.
Percentage Calculator for Discounts, Tips & Markup
Learn how to use percentages for business pricing, profit margins, markup calculations, and financial analysis.
Related Calculator Tools
Date Calculator
Calculate days between dates, add or subtract days from any date.
Age Calculator
Calculate your exact age in years, months, days, hours, and seconds.
Timezone Converter
Convert time between different time zones instantly.
Unit Converter
Convert length, weight, temperature, volume, and 90+ other units.
Frequently Asked Questions
How do I calculate percentage of a number?
To find X% of Y, divide X by 100 and multiply by Y. For example, to find 25% of 200: (25 ÷ 100) × 200 = 0.25 × 200 = 50. Our calculator automates this and shows you each step.
What is the percentage change formula?
Percentage change = ((New Value - Original Value) ÷ Original Value) × 100. If the result is positive, it's an increase. If negative, it's a decrease. For example, going from 100 to 125 is a 25% increase.
How do I calculate a tip percentage?
Multiply the bill amount by the tip percentage divided by 100. For a $85 bill with 18% tip: $85 × 0.18 = $15.30 tip. Total = $85 + $15.30 = $100.30. Our tip calculator can also split the bill.
What's the difference between margin and markup?
Margin is profit as a percentage of selling price. Markup is profit as a percentage of cost. Example: Cost $50, Sell $75. Margin = $25/$75 = 33.3%. Markup = $25/$50 = 50%. Same profit, different percentages.
How do I calculate discount percentage?
To find the final price after discount: Original Price × (1 - Discount%/100). For $100 with 30% off: $100 × 0.70 = $70. To find savings: Original × (Discount%/100) = $100 × 0.30 = $30 saved.
Is this percentage calculator free?
Yes! Our percentage calculator is 100% free with no signup required. All features including visual charts, step-by-step solutions, tip calculator, discount calculator, and margin calculator are completely free to use.