Tax
GST calculator
Add GST to a GST-exclusive price and show the tax component.
How to use this calculator
Enter Price before GST and GST rate. Add GST to a GST-exclusive price and show the tax component. The answer updates when you change an input.
Understanding the result
GST rates, exemptions and reporting rules vary by jurisdiction; this calculator performs the stated arithmetic only.
Common questions
What assumptions does this result use?
The entered price excludes GST and a single rate applies.
Are intermediate values rounded?
No. The calculation retains JavaScript number precision internally and formats only the displayed result unless the stated method requires a discrete whole value.