Percentage Calculator: Calculate Growth, Discounts, and Tips

Calculate percentages, growth rates, and discounts instantly. This tool provides results in plain English so you can understand your data without the mental math.

💡 Use Cases

Handle the four most common percentage scenarios in one place:

• Shopping: Determine the original price of a discounted item or calculate a tip.
• Business: Analyze Year-over-Year (YoY) growth and profit margins.
• Finance: Convert raw data into actionable percentage statistics.

📘 How to Use

Select the tab that matches your goal:

• Calculate %: Find the percentage of one number relative to another (e.g., "What percentage is 3 out of 50?").
• % Change: Calculate the increase or decrease between two values—ideal for tracking stock performance or budget variances.
• Add/Subtract %: Apply a percentage to a base number (e.g., "What is $1,000 + 15% tax?").
• Reverse Discount: Find the original value before a discount was applied.

🧐 FAQ

Can I use this for sales tax? Yes. Use the Add/Subtract % tab. Enter the net price and the tax rate to see the total amount including tax.

Does it handle negative growth? Yes. In the % Change tab, if the final value is lower than the starting value, the tool automatically reports the result as a "decrease."

How many decimal places are shown? Results are rounded to two decimal places, the standard for financial and business reporting.

📚 The Origin of "Percent"

The term "Percent" stems from the Latin per centum, meaning "by the hundred." Originally popularized in 15th-century commerce, the modern "%" symbol evolved from Italian abbreviations for per cento.