Free & Easy
GST Calculator Online
Calculate tax instantly with India's most friendly GST calculator. Whether you're a business owner or a freelancer, get accurate tax splits for FY 2026-27 in seconds.
- 100% Free & Unlimited Calculations
- Intra-State (CGST+SGST) & Inter-State (IGST)
- Updated for latest tax rules & slabs
Calculation Mode
Amount (₹)
GST Rate
Transaction Type
What can you calculate?
Every GST scenario covered. Choose the specialized calculator that matches your business needs.
Exclusive GST
Calculate GST on top of a taxable value.
Inclusive GST
Extract GST from a total amount.
Reverse GST
Remove GST to find the original price.
CGST + SGST
Split for intra-state transactions.
IGST
Inter-state tax for cross-border sales.
GSTIN Validator
Verify any GSTIN instantly.
HSN / SAC Codes
Find GST rate by product/service code.
Amount in Words
Rupees to words for invoices.
Due Dates
GSTR-1, GSTR-3B filing calendar.
Bulk Calc
Multi-item GST in one table.
Why use this Free GST Calculator?
Managing taxes is a breeze with our easy GST calculator. This tool is designed to provide immediate tax splits without signup or any hidden fees. It functions as a reverse GST calculator to extract base values and helps you calculate complex tax invoices on the fly.
How GST works in India
GST (Goods and Services Tax) is a unified indirect tax levied on the supply of goods and services across India. Introduced in July 2017, it replaced a complex web of central and state taxes.
GST is applied at five main rates: 3%, 5%, 12%, 18%, and 28%. For intra-state transactions, GST is split equally into CGST (Central) and SGST (State). For inter-state transactions, the combined tax is called IGST.
GST Calculator Formula
Understanding the mathematical GST calculator formula is essential for manually verifying quotes:
Dedicated Calculators
Inclusive GST Calculator
Remove GST from a price that already includes tax.
Exclusive GST Calculator
Add GST on top of a taxable value.
Reverse GST Calculator
Find the original amount before GST was added.
CGST / SGST Calculator
Intra-state GST split for within-state transactions.
IGST Calculator
Inter-state GST for transactions across state borders.
GSTIN Validator
Validate any GSTIN and decode state, PAN, and entity type.
HSN / SAC Code Lookup
Find the GST rate for any product or service code.
Amount in Words
Convert rupees to Indian English words for invoices.
GST Due Dates
GSTR-1, GSTR-3B, GSTR-9 filing deadlines calendar.
Bulk GST Calculator
Calculate GST for multiple items at different rates.
ITC Calculator
Calculate net GST payable after Input Tax Credit.
Liability Estimator
Track monthly GST and FY running total.
Composition Scheme
Check eligibility and compare regular vs composition tax.