GST Calculator

Calculate GST inclusive and exclusive values with detailed tax breakdown. Supports all common GST rates: 5%, 12%, 18%, 28% and custom values.

GST Calculation Tool

Amount GST Rate (%)

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What is GST?

GST (Goods and Services Tax) is an indirect tax used in many countries including India. It is applied on the supply of goods and services at different tax rates. Common GST rates include: 5%, 12%, 18% and 28%.

GST Formula

Inclusive GST: GST Amount = Price × (GST% / 100)

Exclusive GST: Price = Base Amount + GST Amount

Supported GST Calculations

GST amount (tax)
Price including GST
Price excluding GST
Custom GST percentages

FAQ — GST Calculator

1. Does this calculator work for all GST rates?

Yes, it supports all rates including 5%, 12%, 18%, 28% and any custom rate.

2. Are values rounded?

Yes, all results are rounded to 2 decimal places for clarity.

3. Is the GST calculator accurate for business billing?

Yes, the calculations are based on official GST formula standards.

4. Does this store any user data?

No, everything is calculated offline in your browser.