GST Calculator Online – Calculate GST Amount & Total Price | Free Tool AI

✦ Free online calculator

GST Calculator

Calculate GST amount and final price in seconds. Choose a GST rate or enter a custom rate to estimate tax on a product or service.

1 Enter price details

Base price (₹)

Enter the price before GST.

GST rate (%) 0% 5% 12% 18% 28% Custom rate

Enter a price and select a GST rate to calculate.

This calculator provides an estimate. Confirm the applicable GST rate and tax treatment for your product or service with official guidance or a tax professional.

Calculation result

Base price ₹0.00

GST amount ₹0.00

Total price (including GST) ₹0.00

How to use the GST calculator

Use this free GST calculator to estimate the tax amount and total price for a product or service.

1. Enter the amountType the product or service price in Indian Rupees.

2. Select GST rateChoose a listed rate or select Custom rate to enter another percentage.

3. CalculateView the taxable value, GST amount and final total instantly.

GST calculation formulas

• Add GST: GST amount = Base price × GST rate ÷ 100.
• Add GST: Total price = Base price + GST amount.
• Remove GST: Base price = Inclusive price ÷ (1 + GST rate ÷ 100).
• Remove GST: GST amount = Inclusive price − Base price.

Frequently asked questions

What is a GST calculator?

A GST calculator estimates the Goods and Services Tax on a taxable value and shows the amount before and after GST.

Which GST rates can I calculate?

This tool includes 0%, 5%, 12%, 18% and 28% presets, plus a custom-rate option. The correct rate depends on the product or service and applicable rules.

What is the difference between Add GST and Remove GST?

Add GST calculates tax on a price before GST. Remove GST works backwards from a price that already includes GST to estimate the base price and included tax.

Does this calculator file GST returns?

No. This is a calculation tool only. It does not prepare or file GST returns, create tax invoices, or confirm legal tax compliance.