GST Calculator
Add or remove GST from any amount instantly. Supports all GST slabs — 5%, 12%, 18%, and 28%.
Analytical
Protocol
Technical_Specifications
Goods and Services Tax (GST) computation matrix. Supporting multi-slab inclusive and exclusive tax extraction for Indian business compliance.

GST Compliance Architecture
02GST calculation requires precision handling of CGST, SGST, and IGST components. Our engine identifies the destination-based tax load instantly, supporting standard slabs (5%, 12%, 18%, 28%) and the extraction of base values from total prices.
The Extraction Factor
To find the base amount from a GST-inclusive price at 18%, multiply the total by 100/118. Our calculator automates this 'Reverse Math' to help businesses audit their input tax credits correctly.
Knowledge_Base
Verified Solutions v2.0
How is IGST different from CGST?
IGST is applied to inter-state transactions, while CGST and SGST are applied to intra-state transactions, splitting the tax equally between the Centre and the State.