⌖ GST
GST Calculator.
Add or extract GST from any amount.
⌖ Inputs
⌖ Result
Total invoice value
₹11,800
At 18% GST · Intra-state supply
CGST
₹900
9.00%
SGST / UTGST
₹900
9.00%
Base amount
₹10,000
Total GST
₹1,800
Invoice total
₹11,800
⌖ §I / Formula
The math,
in the open.
Forward calculation simply applies the rate to the base; reverse calculation undoes a tax-inclusive number by dividing through one plus the rate.
Forward: GST = Base × rate%; Total = Base + GST
Reverse: Base = Inclusive ÷ (1 + rate%); GST = Inclusive − Base
On intra-state supplies the GST is split equally between CGST (central) and SGST or UTGST (state / UT). On inter-state supplies the full amount is IGST and is later apportioned between the originating and destination states by the GST Council mechanism.