GST Calculator — Add & Remove GST with Full CGST & SGST Breakdown
Calculate GST instantly for any price. Add GST to get the final invoice amount, or remove GST from an inclusive price to find the base cost. Supports all Indian GST slabs — 5%, 12%, 18%, 28% — plus custom rates. Free, no login, browser-only.
⚡ All calculations happen in your browser. Zero data stored.
💰 Tax Breakdown
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🕒 Recent Calculations
What is the GST Calculator India?
The GST Calculator by WorldOfTools is a free, instant, browser-based financial utility designed to calculate Goods and Services Tax for any price in India. Updated for the 2025-26 fiscal year, it supports all standard Indian GST tax slabs including 0%, 5%, 12%, 18%, and 28%, along with custom percentage inputs.
Whether you're a business owner generating tax invoices, a freelancer computing service tax, an accountant reconciling books, or a consumer checking if a retail price is properly GST-inclusive — this tool delivers precise results instantly. The calculator provides a complete tax breakdown, automatically splitting the total tax into CGST (Central GST) and SGST (State GST), or consolidating it into IGST (Integrated GST) for interstate transactions.
With a strict privacy-first architecture, all mathematical processing happens 100% locally in your web browser. No financial data, invoice amounts, or tax calculations are ever sent to external servers, ensuring absolute confidentiality.
How to Calculate GST Online — Step by Step
Our intuitive interface offers three powerful modes: Add GST, Remove GST, and Bulk Items. Here's how to use them effectively:
Choose Your Calculation Mode — Select "Add GST" to calculate the final invoice price from a base amount. Select "Remove GST" to reverse-calculate the base cost and tax amount from an inclusive retail price. Use "Bulk Items" to build a full multi-item invoice.
Enter the Transaction Amount — Type the price in Indian Rupees (₹). The calculator supports decimal inputs for exact paise accuracy (e.g., 1450.50).
Select the Applicable GST Slab — Choose the correct government tax slab for your product or service (5%, 12%, 18%, or 28%), or manually enter a custom rate. Toggle the "IGST" switch if the transaction crosses state borders.
Get Instant Tax Breakdown — Instantly view the Total Amount, the Base Amount, and the exact tax components (CGST & SGST or IGST). You can easily copy or share the results directly to your clipboard or WhatsApp.
GST Tax Slabs in India (Updated 2024–25)
The Goods and Services Tax council classifies products and services into different tax brackets. Here is a quick reference guide to the current GST structure in India:
| GST Rate | CGST | SGST | IGST | Example Goods & Services |
|---|---|---|---|---|
| 0% (Exempt) | 0% | 0% | 0% | Fresh vegetables, milk, eggs, unbranded flour, printed books |
| 5% | 2.5% | 2.5% | 5% | Edible oils, sugar, tea, coffee, spices, coal, life-saving drugs |
| 12% | 6% | 6% | 12% | Butter, cheese, ghee, mobile phones, processed foods, computers |
| 18% | 9% | 9% | 18% | Most IT services, software, telecom, financial services, restaurants, electronics |
| 28% | 14% | 14% | 28% | Luxury cars, tobacco products, aerated drinks, cement, ACs, casinos |
Note: Tax rates are subject to change based on GST Council meetings. Always verify with official CBIC notifications for specific HSN/SAC codes.
Understanding CGST, SGST, and IGST
India utilizes a dual-GST model. The application of tax depends entirely on the location of the supplier and the place of supply (the buyer's location):
- Intra-State Transactions (Within the same state): When goods or services are sold within the same state (e.g., from Mumbai to Pune), the GST is split equally between the Central and State governments. CGST (Central GST) and SGST (State GST) are applied. For an 18% slab, 9% is CGST and 9% is SGST.
- Inter-State Transactions (Between two states): When the transaction crosses state borders (e.g., from Delhi to Bangalore), the Central government collects the entire tax as IGST (Integrated GST). For an 18% slab, the IGST is applied as a flat 18%.
Frequently Asked Questions
How do I manually add GST to a base price?
To calculate the GST-inclusive price, multiply the base price by (1 + GST%/100). For example, to add 18% GST to ₹1,000: ₹1,000 × 1.18 = ₹1,180. The GST amount is ₹180. Our "Add GST" tab performs this calculation and provides the CGST/SGST split instantly.
How do I remove GST from a total inclusive price?
To extract the base price from a GST-inclusive amount, divide the total price by (1 + GST%/100). For example, if you paid ₹1,180 which includes 18% GST, the base price is: ₹1,180 ÷ 1.18 = ₹1,000. Use the "Remove GST" tab to reverse calculate retail prices.
What is the standard GST rate on software and freelance services?
Software services (SaaS), IT consulting, freelance digital services, and most professional B2B services attract a standard GST rate of 18% under the SAC (Services Accounting Code) system.
Can I calculate GST for an invoice with multiple items?
Yes! WorldOfTools features a dedicated "Bulk Items" tab. You can add multiple line items, each with different prices and varying GST slabs (e.g., one item at 5%, another at 18%). The calculator will compute the individual taxes and provide a grand total for your complete invoice.
Are the calculations rounded off?
Yes, as per standard Indian accounting practices, the calculator handles precise decimal inputs and rounds the final tax amounts to two decimal places (paise) for accurate ledger entries and invoicing.
Is my financial data secure when using this calculator?
Absolutely. Your privacy is guaranteed. The calculator runs purely on client-side JavaScript. This means your invoice amounts, base prices, and tax data never leave your computer and are never logged on our servers.