GST Calculator: Add or Remove GST from Any Amount Instantly
By ToolZoneX Team
•
June 2026
GST (Goods and Services Tax) is India's unified indirect tax. Whether you're creating invoices, checking bills, or pricing products, our GST calculator gives you instant results with CGST, SGST, and IGST breakdowns.
How to Use GST Calculator
1.
Enter the amount2.
Select the GST rate (5%, 12%, 18%, or 28%)3.
Choose "Add GST" or "Remove GST"4.
View the GST amount, CGST/SGST split, and final price
Key Features
- Supports all GST slabs: 5%, 12%, 18%, 28%
- Add GST (exclusive to inclusive) and Remove GST (inclusive to exclusive)
- Shows CGST + SGST breakdown for intra-state transactions
- Clean output ready for invoicing
When to Use This Tool
•
Small business owners creating GST invoices•
Shoppers verifying if the billed GST is correct•
Freelancers calculating tax on service fees•
Accountants doing quick GST computations
Frequently Asked Questions
For intra-state sales, GST is split equally into CGST (Central) and SGST (State). For inter-state sales, IGST applies instead.
Multiply the base price by (1 + GST rate/100). For 18% GST on ₹1000: ₹1000 × 1.18 = ₹1180.
Luxury items, automobiles, aerated drinks, tobacco, and cement fall under the 28% GST slab.
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