🧾 GST Calculator
GST calculator online free — add GST to a base amount or extract GST from an inclusive price at 5%, 12%, 18% or 28%, with automatic CGST/SGST split. Instant and accurate.
🔒 100% Private — no uploads ⚡ Instant — works offline 💸 Free forever — no sign-up
- Net amount (base)
- CGST
- SGST
- Total (incl. GST)
How to use the GST Calculator
- 1 Enter the amount and select the GST rate (5%, 12%, 18% or 28%).
- 2 Choose Add GST (amount is before tax) or Remove GST (amount already includes tax).
- 3 See the net amount, GST amount with CGST/SGST split, and gross total.
Frequently asked questions
How do I add GST to a price?
GST amount = price × rate ÷ 100. Example: ₹1,000 + 18% GST = ₹1,000 + ₹180 = ₹1,180. Choose "Add GST" mode for this.
How do I remove GST from an inclusive price?
Base = inclusive price × 100 ÷ (100 + rate). Example: ₹1,180 inclusive of 18% → base ₹1,000, GST ₹180. Choose "Remove GST" mode.
What are CGST and SGST?
For sales within a state, GST is split equally between Central (CGST) and State (SGST) — 18% becomes 9% + 9%. Interstate sales use IGST at the full rate instead.
Which GST rates apply in India?
Common slabs: 5% (essentials), 12% (processed foods, some services), 18% (most goods and services), 28% (luxury items, automobiles).
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