How this calculation works
Add or remove GST and split the tax into indicative intra-state or inter-state components. The result is calculated locally in your browser from the visible inputs, and the method below remains available for checking.
Worked example
₹1,000 before 18% GST becomes ₹1,180; an intra-state result shows ₹90 CGST and ₹90 SGST.
Assumptions and limits
- Inputs use the units shown beside each field.
- Intermediate values retain precision; displayed values are rounded for readability.
Questions people ask
How does the GST Calculator work?
It applies this displayed method: Exclusive GST = taxable value × rate; inclusive tax is extracted as gross − gross ÷ (1 + rate). Values stay in your browser and are not submitted to a server.
What should I check before using the GST result?
Inputs use the units shown beside each field. Intermediate values retain precision; displayed values are rounded for readability. This is an educational projection. Returns, rates, inflation, tax treatment and product rules can change.
Does this GST calculator save my information?
No. Calculation inputs are processed on this device. Sharing creates a URL only when you choose the share action.