Free GST Calculator Online
Calculate GST amount, rate, and total instantly. Perfect for invoices, quotations, and billing calculations.
GST Calculator
Enter any two values to calculate the third automatically
Maximum: ₹ 100 Crore
How to Use
- • Enter Rate and GST Rate to calculate Total Amount
- • Enter Total Amount and GST Rate to calculate Base Rate
- • All calculations include automatic rounding to 2 decimal places
- • Click preset buttons to quickly set common GST rates
Common GST Rates
- • 0% - Essential items, basic food grains
- • 5% - Food items, medicines, transport
- • 12% - Processed foods, mobile phones
- • 18% - Most goods and services (standard rate)
- • 28% - Luxury items, sin goods
What is GST Calculator?
A GST (Goods and Services Tax) calculator is a useful tool that helps businesses and individuals calculate the GST amount, base rate, and total amount quickly and accurately. Whether you're creating invoices, quotations, or simply need to know how much GST applies to a transaction, our free online GST calculator makes it easy.
Key Features of Our GST Calculator:
- Automatic Calculation: Enter any two values (Rate, GST Rate, or Total) and the third is calculated automatically
- Round Off: All amounts are automatically rounded to 2 decimal places for accurate billing
- GST Inclusive/Exclusive: Calculate both GST-inclusive and GST-exclusive prices
- Quick Presets: One-click buttons for common GST rates (0%, 5%, 12%, 18%, 28%)
- Free to Use: No registration required, use as many times as you need
How GST Calculation Works:
When you have Base Rate and GST Rate:
GST Amount = Base Rate × (GST Rate / 100)
Total Amount = Base Rate + GST Amount
When you have Total Amount and GST Rate:
Base Rate = Total Amount / (1 + GST Rate / 100)
GST Amount = Total Amount - Base Rate
Use Cases:
- • Calculate GST for invoices and quotations
- • Determine base price from GST-inclusive amount
- • Verify GST calculations in existing bills
- • Budget planning with GST estimates
- • Quick reference during customer discussions