Have the total including GST? Find the price before GST and the tax inside it.
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About this tool
Bills and MRPs usually include GST. To find the base price, divide the total by (1 + rate ÷ 100). For ₹1,180 at 18%: 1,180 ÷ 1.18 = ₹1,000, so GST is ₹180.
How to calculate GST
1Type the amountThe price before GST, or the total that already includes GST.
2Pick the GST rateTap a slab or type any rate.
3Add or removeSee GST amount, total and the CGST / SGST / IGST split.
Questions people ask
Why not just subtract 18% from the total?
Because GST is charged on the base price, not on the total. 18% of ₹1,180 is ₹212.40 — which is wrong. The correct GST inside ₹1,180 is ₹180.