Looking for a quick and accurate way to calculate GST? Our free GST Calculator helps you find CGST, SGST, and IGST in just seconds.
Whether you’re a small business owner, freelancer, accountant, or student, this tool makes GST calculation simple, fast, and error-free. Just enter your amount, pick the GST rate, and get instant results.
GST Calculator
GST Calculation Results
How to Use the GST Calculator (Step-by-Step)
Enter the Amount – Choose whether your value is before GST (exclusive) or after GST (inclusive).
Select GST Slab – Current rates are 5%, 12%, 18%, and 28% (soon simplified to 0%, 5%, 18%, and 40% as per GST reform 2025).
Choose Transaction Type
- Intra-state (within same state) → GST split into CGST + SGST.
- Inter-state (different states) → GST charged as IGST.
Click Calculate – Instantly get tax amount and total price.
Example: If you sell goods worth ₹10,000 with 18% GST in Tamil Nadu, you’ll see ₹900 CGST + ₹900 SGST, total ₹11,800.
Why Use Our GST Calculator?
- Free & Online – Use from mobile or desktop, no software needed.
- Error-Free & Accurate – Updated with the latest GST slabs and council notifications.
- Saves Time – Get instant results without manual calculations.
- Handles Complex Scenarios – Works for inclusive/exclusive GST, intra-state, and inter-state.
- Business Friendly – Perfect for invoices, tax planning, and compliance checks.
GST in India – Quick Overview
The Goods and Services Tax (GST) is a unified indirect tax system introduced in July 2017. It replaced multiple taxes like VAT, excise, and service tax with a single nationwide tax.
- CGST (Central GST): Collected by the Central Government.
- SGST (State GST): Collected by the State Government.
- IGST (Integrated GST): Collected on inter-state transactions by the Central Government.
Latest Update (September 2025 GST Reform)
India is simplifying GST slabs:
- Existing: 0%, 5%, 12%, 18%, 28%
- New (from Sept 2025): 0%, 5%, 18%, 40%
This makes compliance easier and goods more affordable.
Common Use Cases
- Shop Owners → Quick GST calculation for daily billing.
- Freelancers & Service Providers → Estimate GST on invoices.
- E-commerce Sellers → Differentiate between intra-state and inter-state GST.
- Students & Learners → Understand GST practically.
- Accountants → Double-check invoice tax calculations.
Pro Tips for Businesses
- Always verify GST calculations before filing returns.
- Keep updated with the GST Council announcements for slab changes.
- Use this calculator for quick estimates, but rely on professional software or GST portal for filing returns.
Frequently Asked Questions (FAQs)
GST (Goods and Services Tax) is a single indirect tax applied across India, replacing multiple taxes like VAT and service tax. It simplifies the tax system and promotes “One Nation, One Tax.”
- CGST + SGST: Apply when buyer and seller are in the same state.
- IGST: Applies when transaction is between two states.
Yes! You can enter a price that already includes GST, and our calculator will break it down into base value and GST amount.
As of now: 0%, 5%, 12%, 18%, 28%. From Sept 2025, new slabs will be 0%, 5%, 18%, and 40%.
Yes – completely free, online, and secure. No login or installation required.
This tool is useful for businesses, freelancers, accountants, e-commerce sellers, and individuals who want quick, accurate GST calculations.
Final Note
Our GST Calculator is designed to make your life easier, bills clearer, and compliance smoother. Whether you’re in Chennai, Mumbai, Delhi, or anywhere in India, this tool ensures you calculate GST in just a click.
Updated on: September 2025 (Latest GST slabs included).