Add GST
Add GST to a base price to get the total amount including tax
Exclude GST
Remove GST from a total price to find the base amount before tax
Exclude GST Calculator
Remove GST from a total price to find the base amount before tax. Supports all Indian GST slabs.
Standard GST Rate
IT services, SaaS, laptops, TVs, refrigerators, coal, machinery, electronics, clothing above ₹2500
Formula
Base = Total × 100 / (100 + GST%)Result
Enter a GST-inclusive amount to extract the base price.
How to remove GST from a price
Enter a tax-inclusive amount and the slab, and the tool separates the base price from the GST.
- 01
Enter the tax-inclusive amount
Use the MRP, a receipt total or any price that already includes GST.
- 02
Pick the slab that was charged
Choose 0%, 5%, 18% or 40%, and intra-state or inter-state. The tool shows the price before tax and the GST inside it, split into CGST and SGST or shown as IGST.
- 03
Use multiple items for a mixed receipt
If a bill mixes slabs, add each line with its own rate and the tool separates the tax line by line.
Why you divide instead of subtracting
GST is charged on the price before tax, so it's a percentage of the base, not of the total. To get the base back, divide by the multiplier. Taking the rate off the total uses the wrong starting number.
| Rate | Tax-inclusive price | Correct base (÷ multiplier) | GST inside it | Wrong base (minus rate) |
|---|---|---|---|---|
| 5% | ₹1,000 | ₹952.38 | ₹47.62 | ₹950.00 |
| 18% | ₹1,000 | ₹847.46 | ₹152.54 | ₹820.00 |
| 40% | ₹1,000 | ₹714.29 | ₹285.71 | ₹600.00 |
The higher the rate, the bigger the error. At 40%, subtracting the rate understates the base by ₹114.29 on every ₹1,000. A quick check: the GST share of an inclusive price is rate ÷ (100 + rate), so 18% GST is always 15.25% of the total.
Worked example: claiming input tax credit
Say a supplier's bill for office chairs comes to ₹23,600 including 18% GST, from a supplier in your state. Divide by 1.18 and the value before tax is ₹20,000, with ₹3,600 of GST: ₹1,800 CGST and ₹1,800 SGST. Those are the figures to match against the supplier's invoice and your GSTR-2B before you claim the credit.