DocomintGST Calculator
Add GST to a price or remove it from a GST-inclusive price, at any rate.
The same add/remove calculation as VAT, under the name used in India, Australia, Canada, and other GST-based tax systems — kept as its own tool since "GST" is a distinct, high-volume search term from "VAT" even though the underlying math (price × (1 + rate/100)) is identical.
Example: A product listed at ₹590 including 18% GST has a pre-GST price of exactly ₹500 — remove mode divides 590 by 1.18 rather than subtracting 18% of 590 directly, which would (incorrectly) give ₹483.80.
How it works
- Choose whether you're adding GST to a price or removing it from a GST-inclusive price
- Enter the price and the GST rate
- The pre-GST price, GST amount, and total appear instantly, calculated on your device
Frequently asked questions
How is GST different from VAT?
They're mathematically identical — both add a percentage on top of a net price — just under different names in different tax systems (GST in India, Australia, Canada, and others; VAT in the UK, EU, and elsewhere).
How do you calculate a GST-inclusive price?
Multiply the pre-GST price by (1 + GST rate/100). A $500 item with 18% GST comes to $500 × 1.18 = $590 including tax.
Is my numbers uploaded anywhere?
No — GST Calculator runs entirely in your browser using JavaScript/WebAssembly. Your numbers is never sent to a server.