🇦🇺 Australia 10% GST • 🇳🇿 New Zealand 15% GST

GST Calculator Australia & New Zealand

Use this free GST calculator to add or remove GST and calculate GST-inclusive and GST-exclusive prices. Select Australia for the 10% GST rate or New Zealand for the 15% GST rate.

✓ AU 10% GST ✓ NZ 15% GST ✓ Add, Remove or Find GST ✓ Free to Use
GST CALCULATOR

Calculate Your GST

🇦🇺 10% GST
AUD
🧮 Your GST result will appear here Enter an amount above to calculate
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Instant Results Calculate GST in seconds
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Local GST Rates 10% Australia and 15% NZ
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Multiple Modes Add, remove or find GST
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Mobile Friendly Works across your devices
AUSTRALIA & NEW ZEALAND

Calculate GST for Your Country

Choose your country to learn more about GST rates, calculations, invoices, pricing and common GST questions.

🇦🇺

GST in Australia

10% Goods and Services Tax

Australia generally applies a 10% GST to most taxable goods and services. Use the calculator to add GST, remove GST or find the GST component of an Australian dollar amount.

Common GST calculations in Australia
  • ✓ Calculate GST for invoices and quotes
  • ✓ Add 10% GST to a price
  • ✓ Remove GST from a total
  • ✓ Find the GST component
  • ✓ Check GST-inclusive pricing
Australian GST Calculator →
🇳🇿

GST in New Zealand

15% Goods and Services Tax

New Zealand generally applies a 15% GST to most taxable goods and services. Calculate GST-inclusive and GST-exclusive amounts, invoices, quotes and GST components.

Common GST calculations in New Zealand
  • ✓ Calculate GST for invoices and quotes
  • ✓ Add 15% GST to a price
  • ✓ Remove GST from a total
  • ✓ Find the GST component
  • ✓ Check GST-inclusive pricing
New Zealand GST Calculator →
SIMPLE GST CALCULATIONS

How to Use the GST Calculator

Calculate GST in four simple steps without doing the maths manually.

1

Select Country

Choose Australia or New Zealand to use the correct local GST rate.

2

Choose Calculation

Add GST, remove GST or calculate the GST component of an amount.

3

Enter Amount

Enter your amount in AUD or NZD depending on the selected country.

4

Get Your Result

See the GST amount, pre-GST price and GST-inclusive total instantly.

GST CALCULATION GUIDE

GST Calculation Formulas for Australia & New Zealand

Need to check the calculation manually? Here are the basic formulas used by the calculator.

+

Add GST

Starting with a GST-exclusive price, calculate GST and add it to the original amount.

Australia GST = Price × 10%
New Zealand GST = Price × 15%
−

Remove GST

Starting with a GST-inclusive price, work backwards to find the original price before GST.

Australia Ex-GST = Inclusive Price ÷ 1.10
New Zealand Ex-GST = Inclusive Price ÷ 1.15
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Find GST in a Total

Find the GST component when you already have a GST-inclusive price.

Australia GST = Inclusive Price × 10 ÷ 110
New Zealand GST = Inclusive Price × 15 ÷ 115
BUILT FOR EVERYDAY CALCULATIONS

What Can You Use the GST Calculator For?

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Invoices

Calculate GST and final invoice totals quickly.

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Small Business

Check GST on sales, services and business expenses.

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Quotes

Add GST to your quotes and confirm customer totals.

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Shopping & Pricing

Work out GST-inclusive and GST-exclusive prices.

To calculate the total cost including GST, simply multiply the original amount by 1 + GST rate (e.g., Amount × 1.15 for 15% GST in NZ).

To do a reverse GST calculation, divide the GST-inclusive amount by 1.15 in NZ to get the GST-exclusive value.

To calculate GST backwards, divide the GST-inclusive amount by 1.15 in NZ to find the pre-GST price.

The GST calculator NZ is a tool aligned with New Zealand’s Inland Revenue Department guidelines to quickly work out GST-inclusive and GST-exclusive amounts.

To calculate GST from a full (GST-inclusive) amount, divide the total by 1.15 (for NZ) to get the pre-GST value, then subtract to find the GST.

To calculate NZ GST from the total amount, divide the total by 11 (GST = Total ÷ 11).

No, the standard GST rate in New Zealand is 15%, not 12.5%.

The GST rate in New Zealand is 15%.

Enter the amount into the GST calculator, and it will automatically compute the GST and total including tax.