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GST Calculator

Add or remove GST from an amount

Enter rupees and paise (up to two decimal places). Choose the applicable rate from your invoice; these presets do not determine a product’s legal GST rate. Tax components are rounded to paise and their sum matches total GST.

GST Details
Enter amount and pick rate
₹

Max: ₹1,00,00,000

Calculate at 18%

Base Amount

₹10,000.00

Before GST

GST Amount (18%)

₹1,800.00

Tax added

Total Amount

₹11,800.00

Base + GST

GST Breakdown
CGST + SGST (intra-state) or IGST (inter-state)

Intra-State (same state)

CGST @ 9%₹900.00
SGST @ 9%₹900.00
Total GST₹1,800.00

Inter-State (different state)

IGST @ 18%₹1,800.00
Total GST₹1,800.00
Complete Summary
Base Amount (entered)₹10,000.00
GST Rate18%
GST Amount₹1,800.00
Base Amount₹10,000.00
Total (incl. GST)₹11,800.00

How to Use

Add GST — Enter the base price to get GST amount and total.

Remove GST — Enter the GST-inclusive price to find the base price.

Available rate presets: 0%, 5%, 12%, 18%, or 28%. Breakdown shows CGST+SGST and IGST variants.

Formula Used

Total = Base × (1 + Rate/100)
GST = Base × Rate/100

Selected-rate Examples

0%Apply only when this rate matches your invoice
5%Apply only when this rate matches your invoice
12%Apply only when this rate matches your invoice
18%Apply only when this rate matches your invoice
28%Apply only when this rate matches your invoice

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