GST Calculator India

Calculate GST online instantly. Easily determine CGST and SGST amounts for GST-inclusive and GST-exclusive prices.

Create GST Invoice

What is a GST Calculator?

A GST calculator helps businesses, freelancers and professionals calculate Goods and Services Tax (GST) quickly and accurately. It automatically determines the tax amount based on the applicable GST rate and provides a detailed tax breakdown.

Whether you are generating invoices, estimating costs or filing taxes, a GST calculator simplifies the process and reduces manual calculation errors.

How to Calculate GST?

GST can be calculated in two ways depending on whether the entered amount includes GST or excludes GST.

GST Exclusive Price Formula

GST Amount = Original Amount × GST Rate ÷ 100

Total Amount = Original Amount + GST Amount

GST Inclusive Price Formula

GST Amount = Inclusive Amount × GST Rate ÷ (100 + GST Rate)

Original Amount = Inclusive Amount − GST Amount

Common GST Rates in India

India follows multiple GST slabs depending on the product or service category.

GST Rate Applicable Categories
5% Essential goods and transportation services
12% Processed foods and business services
18% Most goods and professional services
28% Luxury items and premium products

CGST and SGST Explained

CGST

Central Goods and Services Tax collected by the Central Government for intra-state transactions.

SGST

State Goods and Services Tax collected by the State Government for intra-state transactions.

For intra-state sales, GST is divided equally between CGST and SGST.

Example: An 18% GST rate is split into 9% CGST and 9% SGST.

GST Calculation Example

Suppose the product price is ₹10,000 and the applicable GST rate is 18%.

  • Original Amount: ₹10,000
  • GST Rate: 18%
  • GST Amount: ₹1,800
  • Total Invoice Value: ₹11,800

For intra-state transactions:

  • CGST: ₹900
  • SGST: ₹900

Why Use InvoiceSetu GST Calculator?

  • Instant GST calculations
  • Supports GST-inclusive and exclusive pricing
  • Accurate CGST and SGST calculations
  • Generate GST-compliant invoices
  • Add UPI QR codes for faster payments
  • Download professional PDF invoices

Frequently Asked Questions

How do I calculate 18% GST?

Multiply the original amount by 18 and divide by 100.

What is the difference between CGST and SGST?

CGST is collected by the Central Government, while SGST is collected by the State Government.

Can I generate GST invoices online?

Yes. InvoiceSetu helps you create GST-compliant invoices with automatic tax calculations and PDF downloads.