# GST Calculator

> Add 10% GST to a price or work out the GST in a GST-inclusive total.

URL: https://paycheck-math.com/au/gst-calculator/  
Breadcrumbs: Home > Australia > GST Calculator  
Language: en-AU  
Rates checked: 2026-10-31  

GST in Australia is 10%. Add it to a price or find the GST inside a GST-inclusive amount (divide by 11).

## Result with default inputs

Inputs: amount=100, rate=10, mode=add

**Price with tax: $110.00**

- Tax: $10.00

| Line | Item | Amount |
| --- | --- | --- |
| 1 | Price before tax | $100.00 |
| 2 | Tax | $10.00 |
| 3 | **Price with tax** | $110.00 |


To compute other inputs, call the JSON API: `https://paycheck-math.com/api/v1/calculate?path=%2Fau%2Fgst-calculator%2F&amount=100&rate=10&mode=add` or open the page URL with the same query parameters.

## Examples at 10%

| Amount | Tax added | Total with tax | Tax inside a tax-included amount |
| --- | --- | --- | --- |
| $10.00 | $1.00 | $11.00 | $0.91 |
| $50.00 | $5.00 | $55.00 | $4.55 |
| $100.00 | $10.00 | $110.00 | $9.09 |
| $250.00 | $25.00 | $275.00 | $22.73 |
| $500.00 | $50.00 | $550.00 | $45.45 |
| $1,000.00 | $100.00 | $1,100.00 | $90.91 |
| $5,000.00 | $500.00 | $5,500.00 | $454.55 |

## Questions people ask

### How do I remove VAT from a price?

Divide the VAT-inclusive price by 1 + the rate. At 10%, $110.00 ÷ 1.10 = $100.00.

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Estimates for information only, not tax, legal or financial advice. Check with an adviser or the official tax authority.