GST Calculator - Add or Remove GST Percentage
To add GST: Multiply price by (1 + GST rate/100). Rs 1,000 + 18% = Rs 1,000 x 1.18 = Rs 1,180. To remove GST from GST-inclusive price: Divide by (1 + GST rate/100). Rs 1,180 / 1.18 = Rs 1,000 base, Rs 180 GST. Common rates: 5% (food, essential services), 12% (books, medicines), 18% (most services), 28% (luxury goods, cars).
25% of 200 = 50
What is the Percentage Calculator?
Percentage calculations come up every day — discounts, tips, tax, grades, investment returns, body fat. This calculator handles the three common operations: finding a percentage of a number, calculating percentage change between two values, and finding what percentage one number is of another.
Formula
X% of Y = (X/100) × Y | Change% = ((New − Old) / Old) × 100- X
- = Percentage
- Y
- = Base number
How to use the Percentage Calculator
- 1
Choose a calculation mode
Percentage of a number, percentage change, or X is what % of Y.
- 2
Enter the numbers
Fill in the two inputs based on your chosen mode.
- 3
See the result
Instant answer with step-by-step working shown.
Frequently asked questions
How do I calculate percentage increase?
Percentage increase = ((New value − Old value) / Old value) × 100. Example: salary goes from ₹50,000 to ₹60,000. Increase = ((60,000 − 50,000) / 50,000) × 100 = 20%. A negative result indicates a decrease.
How do I calculate percentage of a total?
Divide the part by the total and multiply by 100. Example: if you scored 85 out of 100, the percentage is (85/100) × 100 = 85%. For 250 out of 400, it's (250/400) × 100 = 62.5%.
What is 30% off a ₹1,500 item?
30% of ₹1,500 is (30/100) × 1,500 = ₹450. The discounted price is ₹1,500 − ₹450 = ₹1,050. Equivalent shortcut: multiply the original price by 0.7 (i.e., 70%).
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Common questions about GST Calculator - Add or Remove GST Percentage
What items are GST-exempt in India?
GST-exempt: unbranded fresh food, milk, curd, eggs, vegetables (fresh), cereals (unbranded), salt, jaggery. 5% GST: packaged food, edible oil, sugar, tea, coffee (not in restaurants). 12% GST: computers, processed food. 18% GST: most services (restaurants below Rs 7,500 turnover), software, telecom. 28% GST: cars, motorcycles, tobacco, luxury goods.
How do I calculate GST in reverse (from total to base price)?
Reverse GST: Base price = Total / (1 + GST rate/100). For 18% GST: Base = Total / 1.18. For 28%: Base = Total / 1.28. Example: Rs 59,000 phone with 18% GST: base = Rs 59,000 / 1.18 = Rs 50,000. GST = Rs 9,000. This reverse calculation is important for input tax credit claims where you need the base invoice value.
What is the GST on a Rs 10 lakh car in India?
Cars attract 28% GST plus 1-22% cess depending on engine size and type. Petrol car under 1200cc: 28% + 1% cess = 29% total. Petrol car 1200-1500cc: 28% + 3% = 31%. Above 1500cc: 28% + 20% cess = 48% total! On a Rs 10 lakh ex-showroom SUV above 1500cc: GST component = Rs 4.8 lakh, base price = Rs 5.2 lakh. This is why car prices include such large tax portions.