GST Calculator
Free GST calculator to add or remove GST at 5%, 12%, 18% or 28% and split into CGST, SGST or IGST. For Mumbai businesses. GST filing help by Consulting Cart.
About the GST Calculator
Whether you're pricing a product or extracting tax from an invoice, our GST calculator does it instantly. Add GST to a base amount or remove it from a gross amount, and see the CGST/SGST or IGST split.
Consulting Cart handles your full GST compliance in Mumbai — registration, returns and reconciliation — so you never miss a deadline.
How to use this calculator
- Enter the amount and select the GST rate.
- Choose to add or remove GST, and intra- or inter-state supply.
- See the GST amount, tax split and net/gross totals.
Formula used
Remove GST: Base = Gross × 100/(100+rate); GST = Gross − Base
Intra-state: CGST = SGST = GST/2; Inter-state: IGST = GST
GST Calculator — FAQs
To add GST, multiply the amount by the rate (e.g. 18%) and add it. To remove GST from a gross figure, divide by (100+rate) and multiply by 100 for the base. The calculator does both.
For sales within a state, GST splits equally into CGST and SGST. For inter-state sales, the full amount is IGST. The calculator shows the right split.
The main GST slabs are 5%, 12%, 18% and 28%, depending on the goods or service. We advise on the correct rate for your business.
From numbers to a real plan.
You've seen the math. Now let a Consulting Cart expert in Mumbai help you act on it — free consultation.