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GST / VAT Calculator

Add or remove GST/VAT and see the net, tax, and gross breakdown instantly.

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Last updated: July 25, 2026

Tax calculator

Add or remove GST/VAT and see the net, tax, and gross amounts.

CurrencyPrice or total amountTax rate (%)What do you want to do?

Net amount

$100.00

Tax amount

$10.00

Gross amount

$110.00

Free GST and VAT calculator

Use this calculator to add tax to a base price or reverse tax from a tax-inclusive price.

Results are simple calculations for convenience and are not tax advice.

How to Use GST / VAT Calculator (Step-by-Step)

Enter the amount and tax rate.

Choose whether tax should be added or removed.

Review the net amount, tax amount, and gross total.

Applications

Common Use Cases

Calculate tax-inclusive and tax-exclusive prices.
Check GST/VAT amounts for invoices and quotes.
Compare final prices at different tax rates.

Privacy Guarantee

Zero Server Uploads

Unlike traditional online converters that upload your confidential documents to external cloud servers, MultiToolX executes computations in your browser runtime via HTML5 Canvas, Web Crypto, and WebAssembly.

Your data never leaves your device and cannot be viewed, stored, or harvested by anyone.

Companion Step-by-Step Guide

GST & VAT Calculator Guide: How to Calculate Forward and Reverse Tax

Learn how to add or remove GST/VAT from product prices. Understand inclusive vs exclusive tax calculations with step-by-step formulas.

Read Full Guide

FAQ

Frequently Asked Questions

Can I use this for both GST and VAT?

Yes. Enter the tax rate used in your country or invoice.

What is removing tax?

Removing tax calculates the pre-tax amount from a tax-inclusive price.

Does it handle multiple tax rates?

Use one combined rate at a time. For multiple taxes, calculate each case separately or enter the combined percentage.

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