Free GST Calculator
Instantly calculate GST for your invoices. Supports both Inclusive and Exclusive calculations for all Indian GST slabs.
- 100% Free Forever
- Instant Calculation
- No Login Required
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Actual Amount
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GST Amount
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Total Amount
Why Use This Calculator?
Avoid manual errors and confusion. Whether you are a billing clerk, a business owner, or a freelancer, getting your tax calculations right is crucial for compliance.
Features:
- Reverse Calculation: Find the pre-tax amount from a total inclusive price.
- Standard Slabs: Quick presets for 5%, 12%, 18%, and 28%.
- Instant Breakdown: See CGST and SGST/IGST splits immediately.
- Mobile Friendly: Calculate on the go from your phone.
Pro Tip: Most invoices in India use the "Exclusive" method (Price + Tax). However, MRP products always use "Inclusive" (Price includes Tax). Make sure you select the right mode!
How to Calculate GST
Step 1: Enter Amount
Input the price of your product or service — either inclusive or exclusive of GST.
Step 2: Select GST Slab
Choose the applicable GST rate: 5%, 12%, 18%, or 28% — or enter a custom rate.
Step 3: Get Breakdown
Instantly see CGST, SGST/IGST splits and the total payable amount.
Frequently Asked Questions
GST (Goods and Services Tax) is a comprehensive indirect tax levied on the supply of goods and services in India. It replaced multiple indirect taxes like VAT, service tax, and excise duty.
India has four main GST slabs: 5%, 12%, 18%, and 28%. Essential items are at 0-5%, while luxury goods are at 28%. Some items also attract a cess above 28%.
CGST (Central GST) goes to the central government, and SGST (State GST) goes to the state government. For intra-state sales, GST is split equally between CGST and SGST.
IGST (Integrated GST) applies to inter-state sales and imports. The full GST amount goes to the central government, which then distributes the state's share.
To find the pre-tax amount from an inclusive price: Original Price = Inclusive Price × 100 / (100 + GST%). Our tool does this calculation automatically in 'Inclusive' mode.