GST calculator.
Add or remove GST, with a clear CGST, SGST / UTGST or IGST breakdown.
- Amount before GST
- ₹10,000.00
- GST at 18%
- ₹1,800.00
- CGST
- ₹900.00
- SGST
- ₹900.00
Tax components are balanced to the rounded GST total. Confirm the applicable rate and supply treatment.
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How it works.
Before GST: tax = amount × rate ÷ 100. Including GST: base = amount ÷ (1 + rate ÷ 100).
Know the assumptions
Enter the rate applicable to your supply and select the correct tax split. This is price arithmetic; it does not determine classification, place of supply, input tax credit or filing liability. Cess is excluded.
CBIC: CGST Rules, rule 35 (tax-inclusive value)Common questions.
Can I remove GST from a total price?
Yes. Choose Including GST. The calculator divides the total by 1 plus the rate as a decimal, then shows the base and tax separately.
Does the calculator select my GST rate?
No. Enter the applicable rate after checking classification and current notifications. The default 18% is only an example.
GST inclusive vs exclusive: calculate the right price
Learn how to add GST to a base price or extract GST from a total, with a worked ₹11,800 example.
