# GST Calculator — Add or Remove GST at Any Rate

> Add GST to a price or work backwards from a GST-inclusive total, with the CGST/SGST split.

To add GST, multiply the amount by 1 plus the rate — ₹1,000 at 18% becomes ₹1,180. To remove GST from an inclusive total, divide by that same figure: ₹1,180 ÷ 1.18 = ₹1,000. Subtracting 18% from the inclusive total gives ₹967.60, which is wrong by ₹32.40 and is the most common error in this calculation.

**URL:** https://convertto.tech/t/gst-calculator
**Category:** Calculators (https://convertto.tech/c/calculators)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Rates:** 0%, 0.25%, 3%, 5%, 12%, 18% and 28%
- **Split:** Intra-state supplies divide equally into CGST and SGST
- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Set the amount.
2. Choose the gst rate.
3. Choose the calculate.
4. Turn "Show the CGST / SGST split" on or off as needed.
5. Choose the currency.
6. The result appears immediately — copy or download it.

## FAQ

### How do I remove GST from an inclusive price?

Divide by 1 plus the rate — not subtract the rate. At 18%, divide the total by 1.18. Subtracting 18% instead gives an answer roughly 3.2% too low, because you would be taking 18% of the inclusive figure rather than of the base.

### What is the difference between CGST, SGST and IGST?

They are the same total tax split differently. A sale within one state splits into CGST for the centre and SGST for the state, half each. A sale across state lines is a single IGST charge at the full rate, which the centre later apportions. The buyer pays the same amount either way.

### Which GST rate applies to my product?

That depends on its HSN or SAC code, and this calculator does not guess — it computes whichever rate you select. Most services sit at 18%, essentials at 5%, and luxury or demerit goods at 28% plus a cess that is separate from GST entirely.

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