Percentages are everywhere - tips at restaurants, discounts while shopping, tax on purchases, grade calculations, and investment returns. Our calculator handles three common scenarios so you can get the answer in seconds without remembering formulas.
What This Calculator Does
It covers the three percentage problems people run into most often:
- X% of Y - Find a percentage of a number. Example: What is 15% of $80? That's $12 off or $12 in tax.
- X is what % of Y - Express one number as a percentage of another. Example: You scored 42 out of 50 on a test. That's 84%.
- % change from X to Y - Measure increase or decrease. Example: Your rent went from $1,000 to $1,200. That's a 20% increase.
When You'll Use This
- Shopping - Calculate the final price during a sale. If an $80 jacket is 25% off, you save $20 and pay $60.
- Dining out - A 15% or 20% tip on any bill amount, calculated instantly.
- School & work - Convert exam scores into percentages or calculate project completion rates.
- Finance - Track how much your investments or savings have grown over time.
How Percentages Work (In Plain English)
A percentage simply means "per hundred." So 25% means 25 out of every 100. When you calculate a percentage, you're just finding a fraction of a whole and scaling it to a denominator of 100. Our tool does all the arithmetic - you just enter the numbers.
Private & Instant
All calculations happen in your browser. No data is sent anywhere, no history is stored, and there's no limit to how many calculations you can run. It's just a fast, private calculator you can use from any device.