Any percentage,
instantly.
Free · No sign-up · Dark mode · Results as you type
01 — Percentage Calculator
What is
% of
?
30
is what % of
?
15%
What are you calculating this for?
🛍️ Shopping
💼 Business
📈 Investing
🎓 School
02 — Percentage Increase / Decrease
From
to
25%
03 — Discount Calculator
Price
Discount
%
$96
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04 — Tip Calculator
Bill
Tip
%
$100.30
05 — Sales Tax Calculator
Price
Tax
%
$108.50
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Frequently asked questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. Example: 15% of 200 = (15 × 200) ÷ 100 = 30. Use calculator #1 above — results appear instantly as you type.
How do I calculate percentage increase?
Subtract the original value from the new value, divide by the original, multiply by 100. Example: from 80 to 100 → (100−80) ÷ 80 × 100 = 25% increase. Use calculator #2.
How do I calculate a discount?
Multiply the original price by the discount percentage, then subtract. Example: $120 with 20% off → 120 × 0.20 = $24 off → final price $96. Use calculator #3.
How much should I tip?
Standard tips: 15% for average service, 18–20% for good service, 25% for excellent. Use calculator #4 for the exact amount.
How do I calculate sales tax?
Multiply the price by the tax rate divided by 100, then add to the original price. Example: $100 with 8.5% tax → 100 × 0.085 = $8.50 tax → total $108.50. Use calculator #5.