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Free Percentage Calculator Online – Calculate Any Percentage Instantly
Calculate percentages online free. Find what percent of a number, percentage change, percentage increase/decrease. Four modes, instant results. No signup.
✅ 100% Free⚡ Instant Results🔒 No Signup📱 Mobile Friendly🔐 No Data Stored
Percentage Calculator
🔢
What is X% of Y?
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Result = (X / 100) × Y
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X is what % of Y?
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Result = (X / Y) × 100
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Percentage Change
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Result = ((To - From) / From) × 100
➕
Add Percentage
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Result = Value × (1 + %/100)
➖
Subtract Percentage
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Result = Value × (1 - %/100)
↔️
Percentage Difference
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Result = |A-B| / ((A+B)/2) × 100
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Common Use Cases
🍽️
Tip Calculation
Calculate 15%, 18%, or 20% tips on restaurant bills instantly and without mental math.
🛍️
Discount Shopping
Find the sale price after a percentage discount or figure out what percentage off a sale item is.
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Tax Calculation
Calculate GST, VAT, sales tax, and other percentage-based taxes on purchases and invoices.
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Business Growth
Calculate revenue growth rates, user acquisition change, and month-over-month performance metrics.
🎓
Academic Grading
Convert raw scores to percentages for exam grading and academic performance tracking.
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Salary Negotiation
Calculate percentage raises, bonus percentages, and total compensation increases.
Frequently Asked Questions
How do I calculate a percentage?
Divide the part by the whole and multiply by 100. For example, 25 out of 200 = 25/200 × 100 = 12.5%.
How do I calculate percentage increase?
(New - Original) / Original × 100. For example, from 80 to 100 = (100-80)/80 × 100 = 25%.
Is a formula shown with the result?
Yes — the tool displays the formula alongside each result so you can understand and verify.
Can it calculate negative percentages?
Yes — percentage decreases show as negative values automatically.
Is the percentage calculator free?
Yes — completely free with no account required.