Modern Percentage Calculator

Percentage Calculator

Fast, accurate, and easy to use.

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Percentage Calculator

Fast, accurate, and easy‑to‑use Percentage Calculator to solve everyday percentage problems in seconds. Calculate percentages, find what percent one number is of another, measure percentage change, and add or subtract percentages instantly — no sign‑up required.

🔢 What Is a Percentage Calculator?

A percentage calculator is an online tool that helps you quickly compute percentage‑based values without manual formulas. Whether you’re a student, teacher, business owner, marketer, or shopper, this tool saves time and eliminates calculation errors.

Our calculator supports the most common percentage operations:

  • % of a number
  • What percent is X of Y
  • Percentage increase or decrease
  • Add or subtract a percentage

🚀 Key Features

  • ⚡ Instant and accurate results
  • 🔄 Auto‑calculation toggle
  • 🎯 Adjustable decimal precision
  • 📱 Mobile‑friendly & responsive design
  • 🌙 Light & dark mode support
  • ❌ Clear inputs with one click
  • 🧮 Multiple percentage calculation modes

📐 Percentage Calculation Modes

1️⃣ Percentage of a Number
Find X% of Y instantly.

Example:

What is 20% of 150?

Result: 30

2️⃣ What Percent Is X of Y
Determine what percentage one number represents of another.

Example:

30 is what percent of 150?

Result: 20%

3️⃣ Percentage Change
Calculate percentage increase or decrease between two values.

Example:

From 80 to 100

Result: 25% increase

4️⃣ Add or Subtract Percentage
Increase or reduce a number by a specific percentage.

Example:

Add 15% to 200

Result: 230

🎓 Who Is This Tool For?

🎓 Students 👩‍🏫 Teachers 💼 Business Owners 📢 Marketers 🛒 Shoppers 💰 Finance Users

Useful for: Math homework, exams, GPA analysis, Quick classroom demonstrations, Profit margins & discounts, Growth rate & ROI calculations, Sales, discounts, tax calculations, Interest and price change analysis.

🧠 Why Use Our Percentage Calculator?

Unlike traditional calculators, this tool is designed for clarity and speed. No formulas to remember — just enter values and get results instantly. It works directly in your browser and keeps your data private.

📊 Common Percentage Formulas Used

Percentage of a number:

(Percentage ÷ 100) × Number

What percent is X of Y:

(X ÷ Y) × 100

Percentage change:

((New − Old) ÷ Old) × 100

Add/Subtract percentage:

Number ± (Number × Percentage ÷ 100)

❓ Frequently Asked Questions (FAQs)

Is this percentage calculator free?

Yes, it’s 100% free and requires no registration.

Does it work on mobile devices?

Absolutely. The calculator is fully responsive and works on phones, tablets, and desktops.

Can I change decimal precision?

Yes. You can select the number of decimal places for precise results.

Is auto‑calculation available?

Yes. Enable auto‑calc to see results instantly as you type.

Is my data stored?

No. All calculations happen locally in your browser.

🔐 Privacy & Security

We respect your privacy. No inputs are saved, tracked, or shared. The tool runs entirely client‑side.

Make percentage calculations fast, simple, and error‑free. Whether for school, business, or daily use — this calculator has you covered.
Start calculating percentages instantly!

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