Universal Percentage Math
Solve complex percentage variables instantly. Quickly determine margins, reverse tax equations, or calculate raw percental differences.
Percentage Calculator
X% of Y
Result:
What percent is A of B?
Result: %
Increase/Decrease by X%
Increased:
Decreased:
Percentage Change
Change: %
Reverse Percentage (Find Base)
Base Value:
Find Original (Reverse Increase/Decrease)
Original (if increased):
Original (if decreased):
Percentage Points Difference
Difference: points
Sales Tax Calculator
Price with Tax:
Price before Tax:
Stacked Discounts (Double Discount)
Final Price:
Effective Total Discount: %
Price Change & Discount Combo
Price after Markup:
Final Price after Discount:
Net Percentage Change: %
Every Formula You Need
This rapid engine natively processes the four core percentage algebraic variations.
What is X% of Y?
Example: What is 20% of 350? → 70
Best for: Calculating retail discounts, sales tax, server tips, sales commission, or compounding interest.
X is what % of Y?
Example: 45 is what % of 180? → 25%
Best for: Determining exact exam score margins, determining total fraction used against a set quota.
Percentage Increase
Example: Price hiked ₹400 to ₹520 → +30% increase
Best for: Quantifying gross salary bumps, evaluating historical inflation, monitoring year-over-year revenue.
Reverse Percentage
Example: ₹630 after 5% tax → original was ₹600
Best for: Finding original retail cost before an aggressive supplier discount was forcefully applied.
Everyday Arithmetic Workflows
Skip the napkin math. Let our browser-native script solve daily hurdles instantaneously.
Shopping Discount
"A jacket costs ₹2,500 but has a 30% discount. How much do I pay?"
₹2,500 × 30% = ₹750 off → Pay ₹1,750
Restaurant Tip
"My bill is $48.60. I want to leave an 18% tip. How much?"
$48.60 × 18% = $8.75 → Total: $57.35
Salary Hike
"I earn ₹60,000/month. Got a 12% raise. What's my new salary?"
₹60,000 × 12% = ₹7,200 → New: ₹67,200
GST Calculation
"Product costs ₹850 before 18% GST. What's the final price?"
₹850 + (₹850 × 18%) = ₹850 + ₹153 = ₹1,003
Investment Return
"I invested ₹50,000. It's now ₹68,000. What's the return?"
(₹68,000 - ₹50,000) ÷ ₹50,000 × 100 = +36%
Final Grade
"I scored 72 out of 90 marks overall. What's my exact percentage?"
(72 ÷ 90) × 100 = 80%
Frequently Asked Questions
How do I calculate percentage decrease?
Use the "Percentage Change" tab. Enter the larger original value and the smaller new value. The output will correctly display as a negative percentage, mathematically proving the specific decrease value.
What does a 'Reverse Percentage' actually mean?
It isolates the original "Base Value" after an inflation margin or discount has already been baked into the final price. For example, if a dinner bill is total $120 and inherently includes a 20% service fee, you can input $120 with an added 20%, and the engine will reveal the raw food cost was exactly $100.
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About This Utility
This tool is provided completely free of charge by Mavertex. Built by Kumar (an independent UI developer), our platform ensures your privacy by executing all operations strictly within your local browser DOM.
We prioritize zero-trust architecture. No files or inputs are ever uploaded to remote servers. This page serves as both an interactive web application and an educational resource explaining the mechanics of client-side operations. For further details on transparency and third-party network usage (including AdSense), please review our Privacy Policy.