📐 How to Use

Enter a base number and a percentage to instantly see what that percentage equals. For example, 15% of 200 = 30.

🔢 Formula

📊 Example

What is 25% of 400?

📈 Percentage Change Formula

💡 Common Uses

• Calculating sale discounts
• Tax and tip calculations
• Grade and score percentages
• Financial growth rates

📝 How It Works

Type or paste any text in the box. All statistics update live as you type.

📊 What We Count

• Words — separated by spaces
• Characters — total including spaces
• Chars (no spaces) — letters and punctuation only
• Sentences — ending with . ! or ?
• Paragraphs — separated by blank lines
• Reading time — at ~200 words/min

💡 Pro Tips

Most blog posts target 1,000–2,500 words. Academic essays often require exact word counts. SEO content typically needs 800–1,500 words per page.

🔒 Why Strong Passwords Matter

Weak passwords are the leading cause of account breaches. A strong password should be long, random, and unique for every account.

✅ Best Practices

• Use at least 12–16 characters
• Mix letters, numbers, and symbols
• Never reuse passwords
• Use a password manager to store them
• Enable two-factor authentication (2FA)

🛡️ Security Note

All passwords are generated entirely in your browser using JavaScript's cryptographic random functions. Nothing is sent to any server.

📊 Strength Ratings

• Weak — under 8 chars or no variety
• Fair — 8–11 chars, some variety
• Strong — 12–15 chars, mixed types
• Very Strong — 16+ chars, all types

🔬 Available Functions

• sin / cos / tan — Trigonometric (radians)
• log — Base-10 logarithm
• ln — Natural logarithm
• √ — Square root
• xʸ — Power/exponent
• π — Pi (3.14159…)
• e — Euler's number (2.71828…)
• |x| — Absolute value
• 1/x — Reciprocal
• % — Modulo

💡 How to Use

Click buttons to build your expression. Functions like sin() and √() accept a value inside the parentheses. Press = to evaluate.

📊 Example Calculations

📐 ROI Formula

📊 Example

You invest $10,000 and receive $13,500 back:

💡 What is ROI?

Return on Investment (ROI) measures the profitability of an investment relative to its cost. A positive ROI means a profit; negative means a loss.

📈 ROI Benchmarks

• Stocks (avg) — ~10% annually
• Real Estate — 8–12% per year
• Marketing campaigns — 100–400%
• Savings accounts — 2–5%

⚠️ Note

ROI doesn't factor in time. Use annualized ROI for comparing investments over different periods.