🧾

GST Calculator — Add or Extract GST & VAT

Add GST or VAT to an amount, or extract the tax already included in a total. Enter your own local rate — rates differ by country and item.

💎 Unlock Premium Features

Support this free tool by visiting our sponsor to claim your exclusive high-roller bonus or access premium analytics.

Claim Exclusive Offer ➔

✨ Key Capabilities

Add GST or VAT to a net amount
Extract GST or VAT already included in a total
Any rate you enter — no hardcoded country rate
Net, tax, and total shown side by side
Instant results as you type

📖 How to Use the GST Calculator — Add or Extract GST & VAT

Enter the amount.
Enter your local GST or VAT rate.
Choose Add GST or Extract GST and read the net, tax, and total.

❓ Frequently Asked Questions

How do I add GST to a price?

Multiply the net price by the rate: for example, 1000 at 18% gives 180 in GST and a total of 1180. Enter your own rate above — this tool does not assume one country's rate.

How do I extract GST from a price that already includes it?

Divide the total by 1 plus the rate, then subtract: for example, a total of 1180 at 18% has a net of 1000 and GST of 180. Choose Extract GST from total above to do it automatically.