Reverse GST Calculator
Calculate original amount before GST online instantly. Remove GST from inclusive prices and find base value, CGST, SGST and IGST accurately.
Last updated: October 2026
Free Online Reverse GST Calculator
Use this free online reverse gst calculator tool directly in your browser without installing software. Fast, mobile friendly and easy to use.
Reverse GST Calculator
Remove GST from inclusive prices instantly and calculate base amount, CGST, SGST and IGST accurately.
GST Breakdown
GST Summary
For a GST-inclusive amount of ₹ 1180.00 with 18% GST, the original amount before GST is ₹ 1000.00. The GST portion is ₹ 180.00, including ₹ 90.00 CGST and ₹ 90.00 SGST.
Extract original amount before GST from inclusive prices.
Automatically calculate equal GST distribution for invoices.
Quickly identify IGST values for inter-state taxation.
Optimized for desktop, tablet and mobile devices.
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About This Tool
About Reverse GST Calculator
This free online Reverse GST Calculator helps remove GST from inclusive amounts instantly.
Useful for invoicing, accounting, billing, taxation and GST-exclusive amount calculations in India.
What This Tool Supports
- GST reverse calculation
- Remove GST from total amount
- CGST and SGST split
- IGST calculation
- Base amount extraction
- Invoice GST analysis
- Multiple GST rates
- Real-time calculations
- Responsive UI
- Indian GST workflows
Frequently Asked Questions
What is Reverse GST Calculator?
A Reverse GST Calculator removes GST from an inclusive amount and calculates the original base amount before tax.
Can this tool split CGST and SGST?
Yes. The GST amount is automatically split equally into CGST and SGST for intra-state calculations.
Does this tool calculate IGST?
Yes. The tool also shows the equivalent IGST value for inter-state transactions.
Is the GST removal calculation accurate?
Yes. The calculation follows standard GST reverse calculation formulas used in India.
Is this Reverse GST Calculator free?
Yes. This tool is completely free to use online.
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