How to Calculate GST in India (2026)

Last Updated: May 2026

GST calculation is important for businesses and individuals to determine tax correctly.

GST Formula

GST = (Amount × Rate) ÷ 100

Exclusive GST Calculation

Example:

• Amount = ₹2000
• GST (18%) = ₹360
• Total = ₹2360

Inclusive GST Calculation

Formula:

GST = Amount − (Amount × 100 / (100 + rate))

Example

₹1180 includes GST:

• Base = ₹1000
• GST = ₹180

Use our GST Calculator for instant results.

FAQs

What is inclusive GST?

GST already included in price.

What is exclusive GST?

GST added on base price.

Conclusion

GST calculation is simple with formulas or tools.