GST Calculator
Add or remove GST from any amount. Supports all Indian GST slabs.
Base amount
₹1,000.00
GST (18%)
₹180.00
Total
₹1,180.00
What is the GST Calculator?
The GST Calculator computes Goods and Services Tax for any amount, in both directions: add GST to a base price or extract the GST component from a tax-inclusive total. It supports the standard Indian slabs (5%, 12%, 18%, 28%) plus custom rates, and shows the CGST/SGST split or IGST as appropriate.
All amounts stay in your browser — invoice figures are never uploaded.
How to use the GST Calculator
- 1Enter the base amount or the total amount.
- 2Choose whether that amount already includes GST.
- 3Pick the applicable GST rate or enter a custom one.
- 4Read the CGST/SGST (or IGST) components and the final value.
Key features
- Add-GST and remove-GST modes
- Standard Indian slab rates plus custom rates
- CGST + SGST split for intrastate, IGST for interstate
- Instant recalculation on every change
Frequently asked questions
What is the difference between CGST and SGST?
CGST goes to the central government and SGST to the state — both apply on intrastate transactions and together equal the total GST.
When does IGST apply?
On interstate transactions and imports — IGST equals the total GST rate and is paid to the centre.
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