Easily calculate any percentage with our free Percentage Calculator. Whether you want to find “A is what % of B”, apply discounts, calculate percent increase or decrease, or find the original price before tax — this tool handles it all in seconds.

🧠 What Is a Percentage Calculator?

A Percentage Calculator helps you quickly solve everyday math problems involving percentages without needing to remember formulas. It’s an essential tool for students, teachers, accountants, business owners, and anyone managing budgets or data.

You can use it to calculate discounts, compare values, analyze financial data, and find growth or decline over time. Instead of manual calculations, simply enter your numbers — the calculator does the rest.

⚙️ How to Use the Percentage Calculator

Our tool covers several common percentage calculations. You can solve multiple types of questions such as:

🔹 1. A is what % of B?

This is the most basic and widely used calculation. It answers questions like:

“What percent is 40 of 200?”

Formula:
Percentage = (Part ÷ Whole) × 100

Example: (40 ÷ 200) × 100 = 20%

Use this for exam scores, sales reports, or comparing two values.

🔹 2. A is B% of what?

This formula finds the base value when the percentage and part are known.
Example: “50 is 25% of what?”

Formula:
Base = (Part × 100) ÷ Percentage

Example: (50 × 100) ÷ 25 = 200

This is useful for reverse calculations, like finding total cost from discounted price.

🔹 3. Percent Change (Increase or Decrease Between Two Values)

The percent change calculator shows how much a value has increased or decreased between two points — perfect for finance, sales, or population growth tracking.

Formula:
Percent Change = ((New – Old) ÷ Old) × 100

Example: Price increased from 80 to 100 → ((100 – 80) ÷ 80) × 100 = 25% increase

It’s equally useful for finding percent decrease when values drop.

🔹 4. Percent Difference (Compare Two Numbers Equally)

The percent difference shows how different two values are, regardless of which one is larger.

Formula:
Percent Difference = (|A – B| ÷ ((A + B)/2)) × 100

Example: Compare 80 and 100 → (|80 – 100| ÷ 90) × 100 = 22.22% difference

This is ideal for statistics, surveys, and scientific data where symmetry matters.

🔹 5. Percentage of Total (Part / Whole → %)

This helps you find what portion one number represents of another — great for surveys, reports, and charts.

Example:
If 45 students out of 60 passed → (45 ÷ 60) × 100 = 75% passed.

It’s one of the simplest yet most useful calculations for understanding proportions and trends.

🔹 6. Apply Percentage (Increase or Decrease a Value by X%)

Perfect for discounts, markups, or tax calculations.

Formula:
New Value = Original × (1 ± (Percent ÷ 100))

Example 1: Decrease $200 by 10% → 200 × 0.9 = $180
Example 2: Increase $500 by 20% → 500 × 1.2 = $600

Use this feature for shopping discounts, salary increments, or price markups.

🔹 7. Reverse Percentage (Find Original Before Percent Change)

This feature finds the original amount before a percentage increase or decrease — useful for undoing discounts, VAT, or markups.

Formula:
Original = Final ÷ (1 ± (Percent ÷ 100))

Example: A shirt costs $90 after a 10% discount → 90 ÷ 0.9 = $100 (original price)

It’s commonly used in tax-inclusive or discounted pricing scenarios.

🔹 8. Percent to Reach Target (Find Required % Change)

This shows how much percentage you need to increase or decrease to reach a goal.

Formula:
Percent Needed = ((Target – Current) ÷ Current) × 100

Example: Increase sales from $800 to $1000 → ((1000 – 800) ÷ 800) × 100 = 25% growth needed

Ideal for goal tracking, sales targets, and performance improvement.

📈 Why Use a Percentage Calculator?

Percentages are everywhere — from shopping deals to finance reports, data analysis, and academic grading.
Doing these calculations manually can be error-prone, especially when handling decimals or large datasets.

An online percentage calculator saves time and ensures accuracy for:

• • 🏬 Business owners calculating profits, markups, and discounts

  • 📚 Students working on math or statistics problems

  • 💰 Investors analyzing percent growth or loss

  • ❤️ Everyday users tracking health, budgets, or survey results

🧩 Benefits of Our Percentage Calculator

• • ✅ Fast and accurate — no manual formulas

  • ✅ Supports multiple calculation types

  • ✅ Mobile and desktop friendly

  • ✅ Perfect for math learning and financial use

  • ✅ Free, simple, and easy to understand

💡 Real-Life Examples of Percentage Calculations

• • Shopping: A shirt originally costs $250, now $200 → 20% off.

  • Salary: You got a raise from $50,000 to $55,000 → 10% increase.

  • Tax: Price after 15% VAT added to $100 → $115.

  • Savings: $500 saved out of $2000 income → 25% savings rate.

  • Goals: To grow your YouTube channel from 800 to 1,200 subscribers → 50% increase.

All these scenarios can be solved instantly using the Percentage Calculator on your site.

🧮 Start Calculating Percentages Easily

Whether it’s for business, school, or daily life, our Percentage Calculator helps you solve all types of percent-related problems instantly.
Stop guessing — start calculating with precision and confidence today!

💚 Try it now — calculate your percentage in seconds!