Quickly calculate GST on your invoices – whether your prices are inclusive or exclusive of GST. Enter the amount and rate, and get the base value, GST amount, and total in seconds.
Built by BrightBooks Advisory Services to help businesses simplify day-to-day accounting and tax calculations.
Use this calculator to find out how much GST is included in a price or how much GST needs to be added. Select whether the amount you entered is before GST (exclusive) or after GST (inclusive).
Enter the value of your product or service.
Common GST slabs are 5, 12, 18, and 28.
Goods and Services Tax (GST) in India is usually charged as a percentage of the taxable value of the supply. The calculator above supports both exclusive and inclusive GST calculations:
When your price is before GST, the GST amount is calculated as:
GST Amount = Base Amount × (GST Rate ÷ 100)
Total Amount = Base Amount + GST Amount
Example: If base amount is ₹1,000 and GST is 18%, GST amount is ₹180 and total is ₹1,180.
When your price is after GST, the base amount is calculated as:
Base Amount = Total Amount ÷ (1 + GST Rate ÷ 100)
GST Amount = Total Amount − Base Amount
Example: If total price is ₹1,180 (including 18% GST), the base is ₹1,000 and GST amount is ₹180.
For regular GST filing, reconciliations, and accounting supervision, you can reach out to BrightBooks Advisory Services.
Yes. You can enter any GST rate (for example 5, 12, 18, 28, or a custom rate). Make sure you use the rate applicable to your product or service.
This tool is designed for quick calculations and understanding GST impact on a single value. For full GST return filing, reconciliations, and records, you still need proper accounting and reports.
The calculator shows the total GST amount. You can manually split this into CGST/SGST (50% each) or IGST as per your transaction type.
Yes. BrightBooks Advisory Services can help you with bookkeeping, GST records, and MIS reporting so your business stays compliant and audit-ready.
