GST Calculator

Calculate GST-inclusive and exclusive pricing, compare slabs, build invoice items, and switch between CGST/SGST and IGST views.

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What this calculator helps with

Price before GST

Start with a base amount and add GST automatically.

Invoice and split view

See item-wise GST and toggle between CGST/SGST or IGST in the result.

Slab comparison

Compare common GST slabs on the same base amount instantly.

Quick rates:

Results update automatically as you change values.

GST calculation

Rs. 1500.00 before GST.

18% GST
Base amount: Rs. 1500.00GST amount: Rs. 270.00Total amount: Rs. 1770.00
CGSTRs. 135.00
SGSTRs. 135.00
IGSTRs. 0.00

Why use a GST calculator?

A GST calculator helps you check invoice totals, reverse-calculate tax-inclusive prices, and compare slab impacts without manual math.

FAQs

Can I calculate GST from a total price?

Yes. Use the price-including-GST mode to split the total into base amount and tax amount.

Can I compare slabs quickly?

Yes. Slab comparison mode shows the output for the common GST rates side by side.

Is this useful for invoices?

Yes. Invoice mode supports multiple line items and split views for CGST/SGST or IGST.