GC
GST Calculator
Add GST to any amount or extract GST from a GST-inclusive price. All rates (5%, 12%, 18%, 28%) supported, with a CGST/SGST breakup.
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Amount & Rate
Result
—
Total (with GST)
Base amount (without GST)—
GST amount—
CGST—
SGST—
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How to use — GST Calculator
- Enter the amount — with GST or without GST, either works.
- Choose the GST rate (0.25%, 3%, 5%, 12%, 18%, or 28%).
- Select Add GST to add GST to the amount, or Remove GST to extract the base price from a GST-inclusive price.
- Click Calculate — the GST amount, CGST/SGST breakup, and total appear instantly.
FAQ
What are CGST and SGST?
For sales within the same state, GST is split into two parts — CGST (Central GST) and SGST (State GST), each half of the GST rate. E.g. 18% GST = 9% CGST + 9% SGST.
How is GST removed (reverse GST) calculated?
The formula to extract the base price from a GST-inclusive amount: Base = Total ÷ (1 + rate/100). E.g. if ₹1180 includes 18% GST, base = 1180 ÷ 1.18 = ₹1000.
What are the GST rates in India?
Common rates: 0.25% (rough diamonds), 3% (gold), 5%, 12%, 18%, and 28%. Most services are taxed at 18%.
Does this calculator work for IGST too?
Yes — for inter-state sales, the entire GST amount is IGST. This tool's "GST amount" is your IGST.
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