Free GST Calculator Online

Calculate GST amounts instantly. Find CGST, SGST, IGST, and total price for any GST rate slab in India.

🧮 GST Calculator

How to Calculate GST

1

Enter Amount

Type the base price or GST-inclusive amount you want to calculate for.

2

Select Rate & Type

Choose the GST slab (5%, 12%, 18%, 28%) and whether to add GST or reverse-calculate from inclusive amount.

3

Get Results

See CGST, SGST, IGST amounts, net price, GST amount, and total price breakdown.

Understanding GST in India

Goods and Services Tax (GST) is India's comprehensive indirect tax system that replaced multiple cascading taxes. It is levied on the supply of goods and services across the country. GST has four main slabs: 5%, 12%, 18%, and 28%, with some goods at 0% and luxury items attracting additional cess.

For intra-state transactions (within the same state), GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions, the entire GST is charged as IGST (Integrated GST). Our calculator automatically computes all three components so you can accurately prepare invoices and understand your tax liability.

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All GST Slabs

Calculate for 5%, 12%, 18%, and 28% GST rates used across India.

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Full Breakdown

See CGST, SGST, IGST, net amount, GST amount, and total price.

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Reverse Calculation

Extract GST from inclusive prices — find the base amount and tax component.

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Invoice Ready

Use calculated values directly on your GST invoices and bills.

Whether you are a small business owner preparing invoices, a CA verifying tax calculations, a student learning about Indian taxation, or a consumer wanting to know the tax breakdown on a purchase, our GST calculator provides instant and accurate results for all GST rate slabs.

FAQ

What is the difference between exclusive and inclusive GST?
Exclusive (add GST) means you enter the base price and GST is added on top. Inclusive (reverse) means you enter the final price and the calculator extracts the base price and GST component.
When should I use IGST vs CGST+SGST?
CGST + SGST applies for intra-state transactions (same state). IGST applies for inter-state transactions. Both total the same GST rate — the split is for revenue distribution between center and state.
Is this calculator legally accurate?
Our calculations are mathematically accurate for standard GST computation. However, for official tax filings, always consult a certified tax professional. Some goods may have special rates or cess.

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