WebSoftOSGST calculator — add or remove GST
To add GST, multiply the taxable value by the rate (e.g. ₹10,000 × 18% = ₹1,800 GST). To remove GST from an inclusive price, divide by (1 + rate): ₹11,800 ÷ 1.18 = ₹10,000. Intra-state supplies split GST equally into CGST and SGST; inter-state supplies charge IGST.
Result
| Taxable value | ₹10,000.00 |
|---|---|
| GST @ 18% | ₹1,800.00 |
| CGST | ₹900.00 |
| SGST / UTGST | ₹900.00 |
| Total (incl. GST) | ₹11,800.00 |
GST formulas
- GST amount = Taxable value × Rate ÷ 100.
- Taxable value from inclusive price = Inclusive price ÷ (1 + Rate ÷ 100).
- CGST = SGST = GST ÷ 2 for intra-state supplies.
Current GST slabs
Since 22 September 2025 most goods and services fall under 5% or 18%, with 40% for specified luxury and sin goods, plus special rates of 0.25% and 3% for some items. Always check the HSN/SAC-specific rate.
Frequently asked questions
How do I calculate 18% GST on ₹1,000?
₹1,000 × 18% = ₹180, so the total is ₹1,180 — ₹90 CGST + ₹90 SGST within a state, or ₹180 IGST across states.
How do I find the GST included in a price?
GST included = Inclusive price × Rate ÷ (100 + Rate). For ₹1,180 at 18%: 1,180 × 18 ÷ 118 = ₹180.
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