GST Calculator Online Free — Add or Remove GST
Add or remove GST at any rate — 5%, 12%, 18%, 28%, or custom.
Last Updated: August 30, 2026
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Open ToolHow to Use Toolza’s Free GST Calculator
Follow these simple steps to get your result in seconds.
Choose Mode
Add GST to a base amount, or remove GST from an inclusive amount.
Enter Amount & Rate
Type the amount and select the GST rate.
Get Results
See the GST amount, total, and base price.
Why Use Toolza’s Free Tool?
Browser-based, private, and completely free — no catches.
100% Private & Secure
Your files never leave your device. All processing happens locally in your browser — no uploads, no servers, no data storage.
Completely Free
No hidden charges, no premium plans, no watermarks. Every feature is free forever.
Works on Any Device
No installation needed. Works on desktop, tablet, and mobile browsers.
No Signup Required
Start using the tool immediately. No accounts, no emails, no personal data.
High Quality Output
Results preserve original quality and formatting.
Lightning Fast
Everything runs locally, so results are instant even for large files.
Calculate GST in Seconds
GST calculations are a daily task for businesses, freelancers, and consumers. This tool handles both directions — adding GST to a base price and extracting GST from an inclusive price.
Common GST rates in India
- 5%: Essential items, foodgrains, packaged food
- 12%: Processed food, business-class tickets
- 18%: Most goods and services (the standard rate)
- 28%: Luxury items, cars, tobacco
Frequently Asked Questions
Goods and Services Tax (GST) is a value-added tax applied in India and other countries on the supply of goods and services.
Yes. Completely free with no limits.
No. All calculations run locally in your browser.
Select "Custom" from the rate dropdown and enter any percentage.
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