Adding GST to a base price
Find the final GST-inclusive price for any product or service by entering the base amount and selecting the applicable GST slab (5%, 12%, 18%, or 28%).
GST Calculator – Add or Remove GST from Any Price Instantly
Calculate GST for India instantly. Add GST to a base price to get the inclusive total, remove GST from an inclusive amount to find the base price, or reverse-calculate the tax rate. Covers all GST slabs — 5%, 12%, 18%, 28%, and custom rates.
Add GST / Sales Tax
Calculate tax-inclusive price from a pre-tax amount
Price (excl. tax)Tax Rate%
Remove GST / Sales Tax
Find the pre-tax price from a tax-inclusive amount
Total (incl. tax)Tax Rate%
Multi-Item Tax Invoice
Add multiple items with different tax rates to see the full breakdown
1%0.00
Subtotal
0.00
Total Tax
0.00
Grand Total
0.00
Reverse Tax Rate Finder
Find the tax rate that was applied by comparing pre-tax and post-tax amounts
Pre-Tax PricePost-Tax Price
Example: if the price changed from 100 to 118 after tax, the applied tax rate is 18%.
GST / Sales Tax Formulas
Add Tax
Total = Price × (1 + Rate ÷ 100)
e.g. $100 at 18% → $100 × 1.18 = $118
Remove Tax
Pre-Tax = Total ÷ (1 + Rate ÷ 100)
e.g. $118 at 18% → $118 ÷ 1.18 = $100
Tax Amount
Tax = Price × Rate ÷ 100
e.g. $100 at 18% → $18
Reverse Tax Rate
Rate = (Total − Price) ÷ Price × 100
e.g. $100 → $118 → (18 ÷ 100) = 18%
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Add or Remove Tax
Quickly add GST/sales tax to a price, or reverse-calculate the pre-tax price from an inclusive amount.
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Multi-Item Invoice
Add multiple line items with different tax rates and get an instant subtotal, tax, and grand total breakdown.
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100% Private
All calculations run in your browser. No financial data is sent to any server.
Common GST Calculation Tasks
Removing GST from a price
Extract the pre-tax base price and exact GST amount from a GST-inclusive total — useful for expense reports and reverse-calculating supplier prices.
Invoice totalling
Calculate the total amount with GST for multiple line items at different tax rates, useful for preparing invoices and purchase orders.
How to Calculate GST Online
1
Enter the amount
Provide the base price or GST-inclusive amount depending on your direction.
2
Select the mode
Choose 'Add GST' to calculate GST-inclusive price, or 'Remove GST' to extract base price.
3
Pick the GST rate
Select 5%, 12%, 18%, 28%, or enter a custom rate.
4
Get result
See the base amount, GST component, and total amount broken down clearly.
GST-Exclusive vs. GST-Inclusive Pricing Explained
GST-exclusive pricing (also called base price or net price) is the amount before tax is added. This is the number used on B2B invoices between registered businesses because both parties can claim input tax credits. To get the GST-inclusive price, add the applicable GST percentage: a ₹10,000 base at 18% GST gives ₹11,800 inclusive. GST-inclusive pricing is what consumers pay at retail — the final MRP printed on products already includes GST. To work backwards from an inclusive price, divide by (1 + rate): ₹11,800 ÷ 1.18 = ₹10,000 base. The “Remove GST” mode here does exactly this calculation, showing you both the base price and the GST component separately.
Which GST Rate Applies to Your Product or Service?
India's GST rate structure has five slabs. The 0% slab covers essential unprocessed food items like fresh vegetables, milk, eggs, and grains. The 5% slab includes items of daily necessity such as sugar, tea, coffee, edible oils, and medicines. The 12% slab applies to processed foods, packaged food products, and certain medicines and medical devices. The 18% slab is the most common for services and manufactured goods — restaurant bills, hotel stays, most professional services, software, electronics, and consumer appliances fall here. The 28% slab covers luxury goods, automobiles, and products with a social cost such as tobacco and aerated drinks — and many of these attract an additional cess. When unsure, check the GST Council's official rate schedule or consult your CA, as misclassification leads to incorrect invoicing and compliance issues.
Frequently Asked Questions
- What are the GST slabs in India?
- India's GST has five main rate slabs: 0% (essential goods like unprocessed food), 5% (daily necessities), 12% (processed food, medicines), 18% (most services and manufactured goods), and 28% (luxury goods, automobiles, tobacco).
- How do I remove GST from a GST-inclusive price?
- Divide the inclusive price by (1 + GST rate). For example, to remove 18% GST from ₹1,180: ₹1,180 ÷ 1.18 = ₹1,000 base price, with ₹180 as the GST component.
- What is CGST and SGST?
- For transactions within a state, GST is split equally between Central GST (CGST) and State GST (SGST). For example, 18% GST becomes 9% CGST + 9% SGST. For inter-state transactions, the full rate applies as IGST.
- Can I use this for VAT or sales tax?
- Yes. The 'custom rate' option lets you enter any tax percentage, making this calculator usable for VAT (UK/EU), HST/GST (Canada), or US sales tax.
- Does this calculator include CESS?
- The base calculation covers standard GST rates. Cess applies on top of the 28% slab for specific goods — add the cess percentage separately if applicable to your product.
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