How to make a GST calculator?

Asked by: Alessandro Becker  |  Last update: June 30, 2026
Score: 4.9/5 (28 votes)

A GST calculator can be created using spreadsheet formulas (Excel/Google Sheets) or basic programming, requiring inputs for the original price and GST rate. Key formulas include adding GST: Price × ( 1 + GST % 100 ) P r i c e × ( 1 + G S T % 1 0 0 ) and excluding GST: Price ( 1 + GST % 100 ) P r i c e ( 1 + G S T % 1 0 0 ) .

How to create a GST calculator?

How to calculate GST?

  1. GST amount = (Price x GST%)
  2. Net price = Cost of the product + GST amount.
  3. GST= Original cost – [Original cost x {100/(100+GST%)}]
  4. Net price = Original cost – GST.

What is the formula for calculating GST?

Let's find out. If you have a GST-inclusive sales price and wish to calculate the 15% GST component of the total price, you can either divide it by 1.15 or follow this formula: Multiply the total sales price by 3. Divide the result by 23.

How to calculate GST on a calculator?

To work out the cost including GST, you multiply the amount exclusive of GST by 1.1. You divide a GST inclusive cost by 11 to work out the GST component. A taxable sale must be: for payment of some kind.

How to create a GST calculator in Excel?

Enter Relevant Data Input GST-inclusive prices (e.g., INR 115) in the respective column. Apply the GST Formula Use a formula like = B2 - B2 / 1.15 for a 15% tax rate to calculate the GST amount. Adjust as needed for different tax rates.

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How to calculate 18% GST formula?

The different slabs for GST are 5%, 12%, 18% and 28%. GST calculation can be explained by a simple illustration : If a goods or services is sold at Rs. 1,000 and the GST rate applicable is 18%, then the net price calculated will be = 1,000+ (1,000X(18/100)) = 1,000+180 = Rs. 1,180.

What is 50000 including GST 18%?

Calculation: Base Price: ₹50,000. GST Amount: ₹50,000 × 18% = ₹9,000. Total Amount: ₹50,000 + ₹9,000 = ₹59,000.

What is the formula used in GST calculation?

What is the formula of GST? The formula for calculating GST is to multiply the net price (exclusive of GST) by 1.1 or divide the price including GST by 11 to determine the GST component.

What is the GST of $1000?

Adding GST to Price

To calculate the amount of GST to add to a price, multiply the price by 0.1 (10% in Australia, $1000✕0.1=$100). Then, to calculate the price inclusive of GST, multiply the original price by 1.1 ($1000✕1.1=$1100).

How to calculate GST for small business?

The normal method for GST is subtracting the amount you paid on purchases (aka ITCs) from what you collected on your sales. This is the amount you must remit to CRA or if you paid more GST on your purchases than you collected on sales, CRA will send you a refund.

What are the common GST mistakes?

Common mistakes include issues such as claiming GST on private purchases or failing to use the correct tax codes. By understanding these pitfalls, businesses can refine their record-keeping habits and ensure that they meet their tax obligations effectively.

Is using a GST calculator free?

With the free GST calculator, you can calculate the tax amount in three simple steps. The tool provides you with three fields that have to be filled, and it calculates GST automatically based on what you fill in.

How to make GST step by step?

What is the process to obtain GST registration?

  1. Visit the Government GST Portal (gst.gov.in) ...
  2. Fill in the requested details in Part-A of Form GST REG-01. ...
  3. Next, fill Part-B of Form GST REG-01 duly signed (by DSC or EVC) ...
  4. If additional information is required, Form GST REG-03 will be issued.

Why do we divide by 11 to get GST?

GST (Goods and Services Tax) is a 10% tax applied to most goods and services sold in Australia. Think of it as the government's slice of the pie—exactly one-eleventh (1/11th) of the total price including GST.

How much is GST on $220?

To find the GST amount in a GST-inclusive price, divide the total price by 11. For example, if an item costs $220 including GST, the GST amount is $220 ÷ 11 = $20.

How to make GST calculation?

GST Amount = (Selling Price x GST Rate) / 100. Here, the Selling Price is determined by adding the Cost Price and Profit Amount. The calculator factors in the Selling Price, representing the total value of goods or services subject to GST, and the GST rate, which fluctuates based on the nature of the goods or services.

How is 18% GST calculated?

Here's an example: If a product is sold at Rs. 1,000 and the GST rate applicable is 18%, then the net price calculated will be = 1,000+ (1,000X(18/100)) = 1,000+180 = Rs. 1,180.

How do you calculate GST in Excel with example?

For example, if the total price is ₹118 with an 18% GST, the person would type =118 / 1.18' in Excel to find the original price of ₹100. Extract GST Amount: After finding the base price, they can calculate the GST amount by subtracting the base price from the total price. For example, ₹118 - ₹100 = ₹18.

How to calculate 5% GST on a calculator?

How do you calculate 5% GST?

  1. Total Cost = ₹1000.
  2. 5% of ₹1000 = ₹1000/100 x 5 = ₹50.

How to do reverse calculation of GST?

Reverse GST Calculation Example

  1. Gross Amount: Rs.1,300.
  2. GST Rate: 12%
  3. Divisor: 1.12 (since 1 + 0.12)
  4. Base Amount: Rs.1,160.71 (Rs.1,300 / 1.12)
  5. Total GST Amount (Integrated tax/IGST): Rs.139.29 (Rs.1,300 - Rs.1,160.71)

How do I calculate GST if GST is included?

Calculating GST from the Amount Including GST

  1. GST Amount = Amount Including GST - (Amount Including GST / (1 + (Tax Rate/100)))
  2. Amount Excluding GST = Amount Including GST - GST Amount.

What is the formula to calculate sales tax?

The basic sales tax formula is Sales Tax Amount = Sale Price × Sales Tax Rate, with the total cost being the Sale Price plus the Sales Tax Amount, or simply Total Cost = Sale Price × (1 + Sales Tax Rate). To use it, convert the percentage rate to a decimal (e.g., 8% becomes 0.08), multiply it by the item's price, then add that tax amount to the original price for the final bill.
 

Can QuickBooks calculate GST?

With QuickBooks, you don't have to expend time and energy calculating GST – the software automatically does this for you to ensure you are legally compliant with the ATO.