How to use the GST Calculator
- 01
Choose direction
“Excluding GST” adds tax to your amount; “Including GST” removes it to reveal the base price.
- 02
Enter amount and rate
Type the amount, pick the slab, and choose intra- or inter-state.
- 03
Read the split
Base amount, total GST, CGST/SGST or IGST, and the final amount update instantly.
Why sellers use this gst calculator
Marketplace prices are GST-inclusive, purchase bills are usually exclusive, and invoices need the tax shown as CGST + SGST for sales within your state or IGST for sales outside it. The GST Calculator does both directions — add tax to a base amount or extract it from an inclusive price — and shows the split you need to write on the bill.
Rates cover the standard slabs (0, 3, 5, 12, 18, 28 %) plus a custom field for cess or special rates.
What you get
Reverse GST in one step
Find the base price hidden inside a marketplace selling price.
Invoice-ready split
CGST/SGST halves or IGST — copy straight to the bill.
All slabs
0, 3, 5, 12, 18, 28 % and custom rates.
Instant and offline
Works without internet once loaded.
Features of the GST Calculator
Inclusive & exclusive
Both directions of the calculation.
Intra / inter-state
Correct CGST/SGST or IGST presentation.
Custom rate
Any percentage, including decimals.
Rounded to paise
Two-decimal rounding as used on invoices.
Copy results
One click copies the breakdown.
Free
No signup or limits.
Frequently asked questions
How do I calculate the base price from a GST-inclusive price?
Base = Inclusive price ÷ (1 + rate/100). For ₹1,180 at 18 %: 1180 ÷ 1.18 = ₹1,000, so GST is ₹180. Choose “Including GST” and the tool does this for you.
When is IGST charged instead of CGST + SGST?
IGST applies when the place of supply is in a different state from the seller (inter-state). Within the same state, GST is split equally into CGST and SGST.
Which GST rate applies to my product?
It depends on the HSN code. Common e-commerce categories: apparel under ₹1,000 at 5 %, above ₹1,000 at 12 %; most electronics accessories at 18 %. Check the HSN on the CBIC GST rate finder.
Ready to run today's batch?
Add GST to a base price or pull it out of an inclusive price, with the CGST/SGST or IGST split ready for your invoice.
Last updated 2026-09-22. LabelCropTools is an independent tool site and is not affiliated with Meesho, Flipkart or Amazon.