Accurate Tax Breakdown
Instantly splits GST into CGST, SGST, or IGST depending on the transaction type — eliminating manual errors.
Free Tool | GST Calculator
GST Tax Calculator — Calculate Indian GST in Seconds
Instantly compute CGST, SGST, or IGST for any invoice amount. Select your supply type and GST slab — get a full tax breakdown in one click.
01
Select Place of Supply
Choose "Within the State" for intra-state transactions (CGST + SGST applies) or "Out of State" for inter-state transactions (IGST applies).
02
Enter Invoice Amount
Enter the net price of your goods or services — the amount before tax is applied. Do not include any existing taxes.
03
Select Tax Rate
Pick the applicable GST slab from the dropdown: 0%, 0.1%, 0.25%, 1%, 1.5%, 3%, 5%, 7.5%, 12%, 18%, or 28%.
GST Tax Calculator
India — all slabs supported
Tax Breakdown
CGST₹ —
SGST₹ —
IGST₹ 0.00
Total Amount (incl. GST)₹ —
Why use this tool
Benefits of the GST Calculator.
Saves Time
Calculate GST for any invoice amount in seconds. No spreadsheets, no manual formulas — just instant results.
Compliance Ready
Results align with India's GST Act — covering all official slabs from 0% to 28% including special rates.
All GST Slabs Covered
From exempted goods (0%) to sin goods (28%), every official slab is available including the special 0.1%, 0.25%, 1.5%, and 7.5% rates.
Intra & Inter-State
Automatically distinguishes between intra-state (CGST + SGST) and inter-state (IGST) transactions based on your supply selection.
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Understanding GST
What is a GST Tax Calculator?
A GST Tax Calculator is a free online tool that computes the Goods and Services Tax payable on any transaction in India. Depending on whether a sale is intra-state or inter-state, GST is split into CGST + SGST or charged as IGST.
GST rates in India range from 0% to 28%. Essential goods are taxed at 0–5%, standard goods and services at 12–18%, and luxury/sin goods at 28%.
This tool supports all official GST slabs: 0%, 0.1%, 0.25%, 1%, 1.5%, 3%, 5%, 7.5%, 12%, 18%, and 28% — and automatically applies the correct formula based on your supply type.
Calculation Formula
GST Amount=( Original Cost × GST% ) ÷ 100
Total Amount=Original Cost + GST Amount
CGST (Intra-state)=GST Amount ÷ 2
SGST (Intra-state)=GST Amount ÷ 2
IGST (Inter-state)=Full GST Amount
FAQs
Frequently asked questions.
A GST Tax Calculator is a free online tool that computes the Goods and Services Tax payable on any transaction. Enter the invoice amount and applicable GST rate, and it instantly calculates CGST, SGST, or IGST and the total payable amount — based on whether the supply is intra-state or inter-state.
GST Amount = (Original Cost × GST%) ÷ 100. Total Amount = Original Cost + GST Amount. For intra-state: CGST = GST Amount ÷ 2, SGST = GST Amount ÷ 2. For inter-state: IGST = full GST Amount.
CGST (Central GST) and SGST (State GST) are levied on intra-state supplies — both at half the total GST rate, collected by the Centre and State respectively. IGST (Integrated GST) applies to inter-state supplies at the full GST rate, collected entirely by the Centre and shared with the destination state.
GST rates vary by goods and services: 0% for essentials like fresh food; 5% for items of mass consumption; 12% and 18% for standard goods and services; 28% for luxury and sin goods. Use the HSN/SAC code for your product to identify the correct slab.
Yes. The WhiteBooks GST Tax Calculator is completely free with no registration required. For advanced features like bulk calculations, GST filing, ITC reconciliation, and e-Invoicing, explore WhiteBooks GST Software.
What Our Customers Say
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Sr Manager - IT Applications, NSL
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