Taxes

GST Calculator

Add or remove GST instantly with a clear CGST / SGST / IGST breakdown

Enter details

₹

Total amount (incl. GST)

₹11,800.00

How the GST calculator works

Goods and Services Tax (GST) is charged on most goods and services in India. This tool adds GST to a net price or removes GST from an inclusive total, then shows the tax split.

Intra-state supplies usually split the rate into CGST and SGST. Inter-state supplies use IGST at the full rate. If you sell outside India, use the VAT calculator for local VAT instead.

Add GST: GST = Amount × Rate / 100  •  Total = Amount + GST
Remove GST: Net = Amount / (1 + Rate / 100)  •  GST = Amount − Net

How to use this calculator

  1. Choose Add GST or Remove GST.
  2. Enter the amount and pick a slab (3%, 5%, 12%, 18%, 28%) or type a custom rate.
  3. Select intra-state or inter-state so you see CGST+SGST or IGST correctly.

Worked example

Example: ₹10,000 net at 18% intra-state becomes ₹11,800 total, with ₹900 CGST and ₹900 SGST.

If a client quotes ₹11,800 inclusive of 18% GST, switch to Remove GST to find the taxable value and tax portion.

When this helps

Built for Indian invoices, quotations and quick checks before you raise a bill.

What this does not cover

HSN classification, exemptions and e-invoice rules are not decided here. Confirm the correct slab for your goods or service under current GST law.

Related guide

Read GST inclusive vs exclusive price in simple terms. Add or remove GST on Indian invoices with CGST, SGST and IGST explained.

Why use it

Detailed features

All GST slabs

One-tap presets for 3%, 5%, 12%, 18% and 28%, plus any custom rate you enter.

CGST / SGST / IGST split

See the exact tax breakdown for intra-state and inter-state transactions.

Add & reverse GST

Work forward from a base price or backward from a GST-inclusive amount.

On the go

Get the same calculator plus 60+ tools in the free Toolance Android app.

Frequently asked questions

Enter the amount and GST rate (5%, 12%, 18% or 28% for most goods). The tool shows tax amount and gross or net value depending on whether your figure is exclusive or inclusive of GST.
On intra-state sales, GST splits into equal Central and State components. IGST applies on inter-state supply. The total rate is still the slab you know, like 18%.
Use the reverse calculation: tax equals inclusive price times rate divided by 100 plus rate. Our calculator can work backwards so you know the pre-tax value.
VAT applied before GST rollout in 2017. Current goods and services use GST slabs. Some items also attract cess on top of the base slab.
No GSTIN is needed for basic math. Businesses issue invoices with their GSTIN separately; this tool only handles rate and amount.
Rates depend on HSN or SAC code and government notifications. Check the latest CBIC schedule or ask your CA for your business line.
No. This helps with quick tax arithmetic only. Return filing, ITC matching and compliance need proper accounting software or a tax professional.
Yes. Use it online anytime with no signup or charge for basic calculations.