How do I add GST to a price?

Enter the base amount and select a GST rate. The tool shows the GST amount and total price with GST.

How do I remove GST from a price?

Switch to Remove GST mode, enter the GST-inclusive amount, and select the rate. The tool shows the base price and GST amount.

What GST rates are available?

The calculator supports 5%, 12%, 18%, 28%, and custom GST rates.

Yes, completely free with no usage limits.

Can I enter a custom GST percentage?

Yes. You can select from the standard GST slabs (5%, 12%, 18%, 28%) or enter any custom percentage. This is useful for goods with special GST rates.

Free Tool — Instant GST Calculation

GST Calculator

Add or remove GST, split into CGST/SGST, and choose from standard Indian GST rates — all in your browser.

Add GST

Amount (₹)

GST Rate

Tax Type

Result

Original Amount ₹ 0.00

GST Amount ₹ 0.00

Total Amount ₹ 0.00

Ready to calculate

Toggle a mode, enter an amount, and pick a GST rate.

Why Use AFFLIGO?

100% Private

Your numbers stay in your browser. Nothing sent anywhere.

Standard GST Rates

5%, 12%, 18%, 28% presets with custom rate support.

CGST + SGST Split

See the exact CGST and SGST breakdown for intra-state transactions.

Read the Guide

How to Calculate GST

Step-by-step guide to calculate GST amounts with CGST/SGST split.

Read Guide →

More Utility Tools

Discount Calc

Percentage Calc

EMI Calculator

SIP Calculator

How to Calculate GST

Step 1

Pick a Mode

Toggle between Add GST and Remove GST to suit your need.

Step 2

Enter Details

Type the amount, choose a GST rate, and select intra or inter-state.

Step 3

Read Results

See GST, total, and the CGST/SGST or IGST split instantly.

Frequently Asked Questions

What GST rates are supported?

Supports all standard GST rates: 5%, 12%, 18%, 28%, plus any custom rate.

Can I calculate reverse GST?

Yes, calculate GST amount from inclusive price or exclusive price by toggling Add/Remove mode.

Is it accurate?

Yes, uses standard GST calculation formulas for accurate results.

Can I compare CGST/SGST/IGST?

Yes, shows breakdown of CGST+SGST for intra-state and IGST for inter-state transactions.

Is my data private?

Yes, all calculations happen in your browser. No data is sent anywhere.