GST Calculator

Calculate Tax with Precision: The Ultimate Free GST Tool

Accurate financial calculations are critical for businesses, freelancers, and smart shoppers. Whether you are generating an invoice for a client or verifying the tax on a purchase receipt, the Free GST Calculator eliminates the guesswork. This tool is specifically engineered to handle the two most common tax scenarios: calculating the total price by adding tax to a net amount (Exclusive) and extracting the exact tax component from a final price (Inclusive).

Unlike simple calculators, our tool allows for fully customizable tax rates. This makes it universally compatible with various global tax systems, including Canada's GST/HST, Australia's GST, India's multi-tier slab rates, and New Zealand's GST. Stop relying on mental math that leads to errors—get precise figures instantly.

How to Perform Your Calculation

1. Input Value: Enter the dollar amount you are working with.
2. Define Rate: Input the GST percentage specific to your region (e.g., 5 for Canada, 10 for Australia).
3. Select Mode: Choose "Add GST" if your amount is before tax. Choose "Remove GST" if your amount already includes tax.
4. Get Results: Click "Calculate" to see a clean breakdown of the Net Amount, GST Amount, and Total Price.

Frequently Asked Questions

How do you calculate GST?

The calculation depends on whether you are adding or removing tax. To add GST (Exclusive), multiply your base price by the tax rate percentage (e.g., $100 × 0.05 = $5 GST). To remove GST (Inclusive) from a total figure, divide the total price by (1 + tax rate percentage). For example, with a 5% rate, divide by 1.05.

How to calculate GST from total amount in Canada?

To reverse calculate GST in Canada (where the federal rate is 5%), divide the total inclusive amount by 1.05. The result is the pre-tax price. Subtract this pre-tax price from the original total to find the exact GST value. For provinces with HST (e.g., 13%), divide by 1.13 instead.

How much is GST for $100?

This depends entirely on the tax rate. At a 5% rate, the GST on $100 is $5.00. At a 10% rate, it is $10.00. At 18%, it is $18.00. Simply enter your local rate into the "GST Rate" field above to get the specific amount.

What is the rate of GST?

There is no single global rate. Rates vary significantly by country and region: Canada (5%), Australia (10%), New Zealand (15%), and India (5%, 12%, 18%, or 28%). Always check your local tax authority guidelines to ensure you are using the current rate for your specific goods or services.

What is the GST calculator?

A GST Calculator is a digital utility designed to automate the Goods and Services Tax computation. It serves two functions: it helps sellers determine the final price to charge clients by adding tax, and it helps buyers or bookkeepers determine the actual cost of a product by stripping away the tax component from a receipt total.