Quickly calculate GST for any bill or invoice. Add GST to a base price, or extract the GST amount from a GST-inclusive price — useful for shopkeepers, freelancers, and anyone checking a bill.
🧾 GST Calculator
GST Amount-
CGST (Half)-
SGST (Half)-
Total Amount-
How to Use This GST Calculator (India)
Enter the price (base amount or GST-inclusive amount).
Select the GST rate — 5%, 12%, 18% or 28%.
Choose Add GST or Remove GST and tap Calculate.
Formula
GST Amount = Price × Rate ÷ 100. Total = Price + GST Amount. To remove GST: Base = Inclusive ÷ (1 + Rate/100).
Example: ₹10,000 + 18% GST → GST amount ₹1,800, total ₹11,800. Removing 18% from ₹11,800 gives base ₹10,000.
Frequently Asked Questions
▶ What are the GST slabs in India?
The main GST slabs are 0% (essential items), 5% (common goods), 12% (processed foods, textiles), 18% (most services and electronics) and 28% (luxury items).
▶ What is the difference between CGST, SGST and IGST?
For sales within a state, GST is split equally into CGST (central) and SGST (state). For inter-state sales, the full amount is charged as IGST.
▶ How do I remove GST from an inclusive price?
Divide the inclusive price by (1 + GST rate/100). For example, ₹118 inclusive of 18% GST = ₹118 ÷ 1.18 = ₹100 base price.
▶ Is this calculator suitable for invoices?
Yes, it gives exact GST amounts for any rate, which you can use for quotations, invoices and bill verification.
