Percentage Calculator

How to use this tool

1. Choose the calculation type tab (percent of, percentage change, profit/loss, or discount).
2. Enter the two values the calculation needs.
3. The result updates instantly as you type.
4. Switch tabs anytime for a different percentage calculation.

What can this calculator do?

Percentages turn up everywhere — sales tax, shopping discounts, exam scores, profit margins, financial growth. This page combines the four most-searched percentage problems into one tool, with each one a single-click tab away.

Percent of a number

The classic case: "What is 15% of 200?" Multiply the two values and divide by 100. The answer is 30. Useful for quickly working out tips, taxes, or savings.

Percentage change

Compares two values to see how much one has grown or shrunk relative to the other. If a stock moved from ₹500 to ₹650, the percentage increase is 30%. If it moved from ₹650 back to ₹500, that's a 23% decrease — the asymmetry is real and often surprises people.

Profit and loss

For shopkeepers, traders, and resellers: enter your cost price and selling price and the tool tells you both the absolute profit (or loss) and the profit percentage. Note: profit margin (profit ÷ selling price) and markup (profit ÷ cost price) give different numbers — this calculator uses cost-based markup, the most common convention.

Discount

Shows the final price after a percentage discount and how much you save. "30% off ₹2,500" → ₹1,750 final price, ₹750 saved. Handy for comparing offers in real time while shopping.

What this calculator can do

This tool handles the four most common percentage calculations Indian users need every day. Switch between the four tabs at the top:

• Percent of: "What is X% of Y?" — useful for tax calculations, GST math, tips, and commission.
• Percentage change: "By what percentage did X go up to become Y?" — useful for salary hikes, mark-ups, and discount comparisons.
• Profit / loss: "I bought at ₹X and sold at ₹Y — what's my profit %?" — for resellers, shop owners, and traders.
• Discount: "Original price ₹X with Y% off — what do I pay?" — for Diwali sale shopping, end-of-season sales, and price comparison.

Worked examples

Calculating 18% GST on ₹2,500: 2500 × 0.18 = ₹450. Add ₹2,500 + ₹450 = ₹2,950 final price.

Salary hike from ₹50,000 to ₹62,500: percentage increase = ((62500 − 50000) / 50000) × 100 = 25%.

Buying at ₹400, selling at ₹520: profit = ₹120; profit % = (120 / 400) × 100 = 30%.

Diwali sale 35% off on a ₹4,200 shirt: discount = 4200 × 0.35 = ₹1,470. Pay = ₹4,200 − ₹1,470 = ₹2,730.

Common percentage mistakes Indians make

Stacking discounts wrongly. A "30% off then additional 20% off" is not 50% off. It's 30% off the original, then 20% off the discounted price — which works out to 44% off the original, not 50%. Online retailers exploit this confusion at sale time.

Confusing percentage points and percent change. If a tax slab moves from 5% to 10%, that's a "5 percentage point" increase but a "100% increase" in absolute tax rate. Both phrasings appear in finance journalism and they mean different things.

Calculating GST backwards wrong. If your invoice total of ₹2,950 includes 18% GST, the base price is NOT ₹2,950 × 0.82 (= ₹2,419) — it's ₹2,950 / 1.18 (= ₹2,500). Removing GST is division by (1 + rate), not multiplication by (1 − rate).

Disclaimer

This calculator produces standard arithmetic results. For tax calculations, the actual tax due may differ from a simple percentage calculation due to surcharge, cess, and slab thresholds — always cross-check with a Chartered Accountant or use the Income Tax India official calculator before filing.

Frequently asked questions