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ADVANCED GST CALCULATOR

Calculate inclusive and exclusive GST instantly. Generate CGST/SGST breakdowns, convert amounts to words, and itemize your invoices.

Quick Calculator

Amount entered is before tax. GST will be added to the total.
%

Calculation Summary

Total Net Amount
₹ 0.00
Base Amount

₹0.00

Total GST

+ ₹0.00

Tax Component Breakdown
18% GST
CGST (9%) ₹0.00
SGST (9%) ₹0.00
IGST (18%) ₹0.00
Amount in Words

Zero Rupees Only.

Invoice Itemizer

Add multiple items with different GST rates to calculate a consolidated invoice.

Item Description Price (₹) Qty GST % Net Total (₹)
0.00
Total Taxable Value: ₹0.00
Total GST Added: + ₹0.00
Invoice Grand Total: ₹0.00

About the Free GST Calculator Online

Inclusive & Exclusive GST

Easily switch between adding GST to a base price (Exclusive) or extracting the base price from a total amount (Inclusive). Perfect for reverse tax calculations.

CGST, SGST & IGST Breakdown

Automatically splits your calculated tax into Central GST (CGST) and State GST (SGST) for local sales, or calculates Integrated GST (IGST) for inter-state commerce.

Invoice Itemization

Advanced table feature allows you to add multiple products, apply different quantities, and set varying tax slabs per item to generate a consolidated grand total.

Automatic Number to Words

Saves time during invoice generation by automatically converting your total calculated net amount into the Indian numbering system format (Lakhs/Crores) in words.

Frequently Asked Questions

Exclusive GST means the tax is added on top of the base price. For example, ₹100 base + 18% GST = ₹118 total. Inclusive GST means the entered price already contains the tax, and the calculator works backwards to find the base price and the tax component.

For intra-state sales (within the same state), the total GST rate is divided equally into Central GST (CGST) and State GST (SGST). For example, 18% GST becomes 9% CGST and 9% SGST. For inter-state sales (between different states), the full 18% is applied as Integrated GST (IGST).

Yes! Our tool features an Advanced Invoice Itemizer that allows you to calculate mixed-rate invoices, generate exact tax breakdowns, and automatically outputs the final amount in words, which is a legal requirement for Indian invoices.