GST Calculator

How to Calculate GST?

GST is a value-added tax applied to goods and services in many countries. To calculate GST, you need:

• The base price (before GST) or the total price including GST
• The GST rate applicable in your country
• Whether you want to add GST (to calculate the total price including GST) or subtract GST (to find the pre-GST price)

Formulas:

• To add GST: Net Price × (1 + GST Rate) = Gross Price
• To subtract GST: Gross Price ÷ (1 + GST Rate) = Net Price

Using our GST tax calculator online, you can calculate both quickly without manual work.

GST Rates in Different Countries

Different countries apply different GST (or VAT) rates. Below is a list of standard rates:

Our tool is flexible, so you can adjust it for your country’s GST rate.

How to Use the GST Calculator?

Using our GST tax calculator online is straightforward:

1. Enter the base amount (before GST) or total amount (after GST).
2. Choose or input your applicable GST percentage. 
3. Click Calculate.
4. Instantly view the GST amount, net price, and gross price.

This makes it perfect not only for everyday GST calculations but also as a GST tax return calculator when filing returns.

Examples of Calculating GST

Example 1 – Adding GST (Australia 10%):

Carla runs a small online store in Australia selling handmade candles. She wants to sell a candle set for AUD $200 before GST.

Because she’s registered for GST, she needs to add 10% GST to the selling price.

Calculation:

• Net Price (before GST): $200
• GST: $200 × 10% = $20
• Gross Price (customer pays): $200 + $20 = $220

Therefore, Carla must charge a total of $220.

Example 2 – Subtracting GST (Australia 10%):

Peter bought a new gaming chair for AUD $220, including GST. He wants to know the price before GST and how much GST he paid.

Calculation:

• Gross Price (including GST): $220
• Net Price (excluding GST): $220 ÷ 1.10 = $200
• GST: $220 – $200 = $20

Peter paid $20 GST, and the actual product price was $200.

With this tool, you can easily switch between adding and removing GST.

Disclaimer

This GST tax calculator online is for informational purposes only. GST rates vary depending on the country, state, and type of goods or services being taxed. Always verify your results with government portals or consult a tax professional when preparing your GST tax return calculator reports.

FAQS

How to calculate GST? 

You can calculate GST cost in two ways:

• To add GST: Multiply the net price by (1 + GST rate) to get the gross price.
• To subtract GST: Divide the gross price by (1 + GST rate) to get the net price.

How do you calculate reverse GST?

Reverse GST means removing GST from a total (GST-inclusive) amount.

Use this formula: Net Price = Gross Price ÷ (1 + GST rate)

Example (10% GST):

$220 ÷ 1.10 = $200 (net price)

Is GST calculated on gross or net?

• GST is calculated on the net price (before GST) to find the GST amount.
• To subtract GST from a price, use the gross price (includes GST).

What is the formula for calculating GST?

• The formula to add GST: Gross Price (after adding GST) = Net Price × (1 + GST rate)
• The formula to subtract GST: Net Price (before adding GST) = Gross Price ÷ (1 + GST rate)

How to figure out GST from the total?

You can calculate GST already in a price. First, divide the Gross price by (1 + GST rate) to find the Net price. Then, subtract the Net price from the Gross price to get the GST amount.

• Step 1: Net Price = Gross Price ÷ (1 + GST rate)
• Step 2: GST = Gross Price − Net Price

Example: (Gross Price = $110, GST = 10%)

• Net Price = 110 ÷ 1.10 =$100 
• GST = 110 - 100 = $10 

How to Calculate the Amount After GST?

Amount after GST (Gross price) = Net Price × (1 + GST rate)

Example: Net Price = $100, GST rate = 10%

Amount after GST (Gross price) = $100 × 1.10 = $110

What is $100 including GST?

$100 including 10% GST means:

• GST = $100 ÷ 11 = $9.09
• Net price = $90.91

Why do you divide by 11 for GST?

Because when GST is 10%, the gross price includes 110% of the net price.
So:

GST = Gross Price ÷ 11

Example: $220 ÷ 11 = $20 (GST portion of total)

How to minus 10% GST?

To remove 10% GST from a price, divide the gross amount by 1.10 to get the net price (before GST).

Example: $220 ÷ 1.10 = $200 (Net Price)

How much GST do I pay on $1000?

GST Rate Is 10%

GST = $1000 × 10% = $100

How to calculate 15% GST?

• To add GST: $Amount × 1.15

Let’s say the net price (before GST) is $200.

Gross Price = Net Price × 1.15

Gross Price = 200 × 1.15 = 230

• To remove GST: $Amount ÷ 1.15

Let’s say the gross price (including GST) is $230.

Net Price = Gross Price ÷ 1.15

Net Price = 230 ÷ 1.15 = 200

What is $500 plus GST?

GST Rate Is 10% 

$500 × 1.10 = $550

(GST added is $50)

How to remove 5% GST from the total amount?

To remove 5% from the Gross price. Divide gross price by 1.05

Example: $105 ÷ 1.05 = $100

How to subtract 10% GST?

Divide the total by 1.10

Example: $220 ÷ 1.10 = $200

How much GST do I pay on $250?

GST Rate Is 10%

GST = $250 × 10% = $25