Professional GST Calculator
Free GST Calculator Online | Calculate GST Amount Instantly
Updated: October 2025 | By: GST Tools India
Want to calculate GST instantly without installing any app? Our Free GST Calculator Online helps you find accurate GST amount in just seconds. Whether you're a business owner, accountant, or student, this simple tool will save you time and effort. Calculate GST amount, total price, CGST, SGST, and IGST instantly!
📘 What is GST?
GST (Goods and Services Tax) is a value-added tax levied on most goods and services sold for domestic consumption in India. It was introduced on 1st July 2017 as a single, unified indirect tax replacing VAT, Service Tax, and Excise Duty.
GST is divided into three parts:
- CGST: Central Goods and Services Tax
- SGST: State Goods and Services Tax
- IGST: Integrated Goods and Services Tax (for interstate transactions)
🧮 What is a GST Calculator?
A GST Calculator is a simple online tool that helps you calculate the GST-inclusive or exclusive price of goods and services within seconds. It removes the need for manual calculations and helps ensure 100% accuracy.
"GST Calculators are essential for quick billing and error-free accounting."
⚙️ How to Calculate GST Amount
You can calculate GST in two ways:
- When price is exclusive of GST
- When price is inclusive of GST
📏 GST Calculation Formula
To calculate GST manually, use these formulas:
| Condition | Formula |
|---|---|
| GST Exclusive | GST Amount = (Original Price × GST%) / 100 |
| GST Inclusive | GST Amount = Original Price - [Original Price × (100 / (100 + GST%))] |
🧾 Example: GST Calculation
Let’s say you bought a product worth ₹1,000 and the GST rate is 18%.
GST Amount = (1000 × 18) / 100 = ₹180
Total Price = ₹1000 + ₹180 = ₹1180
"So, the total price including 18% GST will be ₹1180."
🚀 Top Features of Our GST Calculator Tool
- ✅ 100% Free — no login or signup required
- ⚡ Instant GST calculation results
- 📱 Mobile-friendly and works on any device
- 📊 Supports GST-inclusive and exclusive both types
- 🔒 Secure and accurate every time
💡 Benefits of Using an Online GST Calculator
| Manual Calculation | Online GST Calculator |
|---|---|
| Time-consuming | Instant results |
| Prone to human error | 100% accurate |
| Requires formulas | No math knowledge needed |
| Offline access only | Available 24/7 online |
❓ Frequently Asked Questions
1. What are the current GST rates in India?
There are mainly four slabs — 5%, 12%, 18%, and 28%. Certain essential items are exempted from GST.
2. How do I calculate CGST and SGST?
When GST rate is 18%, CGST = 9% and SGST = 9%. Each is half of the total GST rate.
3. Can I calculate reverse GST (inclusive price)?
Yes, this calculator supports both inclusive and exclusive GST calculations.
4. Is this tool free to use?
Yes! It’s 100% free, secure, and requires no registration.
5. Does it work on mobile?
Absolutely! The calculator works smoothly on Android, iOS, or any browser.
✅ Final Thoughts
GST can be tricky, but our Free GST Calculator Online makes it effortless. You can calculate total price, GST amount, CGST, SGST, and IGST instantly — without downloading anything. Whether you’re a small shop owner or a big business, this simple calculator saves time and ensures accuracy.