Simple GST estimate
A quick GST amount and post-tax total.
$12.00tax amount
Load this exampleCalculator
GST Calculator
Use this when you need a quick GST estimate from a pre-tax amount.
Result
Sales Tax
Add a tax rate to a pre-tax amount and see the tax collected and total charged.
- Tax amount
- $9.60
- Total with tax
- $129.60
- Tax rate
- 8.0%
Breakdown
Plain-English math so the result stays easy to explain.
- Subtotal$120.00
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Tax
GST Calculator
Use this when you need a quick GST estimate from a pre-tax amount.
This page keeps GST math lightweight so quotes, invoices, and product orders can be checked quickly without rebuilding the same formula by hand.
How to use this page
Start with your best current estimate, adjust the inputs until the result feels realistic, and use the related tools below when you want to pressure-test price, profit, or payout from another angle.
Add a tax rate to a pre-tax amount and see the tax collected and total charged.
Use the calculator with the examples below to test ideas quickly and come back to the same setup later.
Related calculators
Keep moving through the launch pages without rewriting your pricing math.
Worked examples
Start from a realistic scenario
Each example opens the same calculator with shareable URL state.
FAQ
Quick answers
Short answers for the questions that usually come up first.
Can I use this for any GST jurisdiction?
It is a generic rate-based estimate only, so you still need to verify the right rate and rules for your location.
Why have separate GST and VAT pages?
Because people search and think in those terms differently, even when the estimate uses the same basic math.