Logo GST Calculator
Provide the price before GST. Negative values are not supported.
Adjust the rate or use a quick pick to match your tax rules.

GST calculation preview

GST added

Enter a price excluding GST to see GST amount and the total including GST.

Enter a GST-exclusive price and rate to calculate the GST amount and inclusive total.

How to interpret your GST results

Base amount

The GST-exclusive price you entered. Use it to track revenue before tax.

GST amount

The tax calculated from the base amount. Record it for remittance and compliance.

Total including GST

The amount payable by customers once GST is added, ideal for quotes and invoices.

What the GST exclusive calculator does

A focused add GST calculator for turning prices excluding GST into totals including GST.

The GST exclusive calculator converts any pre-tax amount into a GST-inclusive total in seconds. Built for quotes, invoices, and pricing workflows, it aligns with current tax rules across Australia, New Zealand, Canada, India, and Singapore. By combining a trusted GST formula with clear output, this add GST calculator helps teams document the GST amount, communicate the total price including GST, and stay compliant while working out GST on an amount without guesswork.

GST exclusive calculator examples

Real business scenarios showing how to add GST to exclusive prices and communicate totals.

Australian invoice with 10% GST

A design agency needs a GST-inclusive quote.

Calculation Steps

  • Base design fee: A$1,200
  • GST rate: 10%
  • GST amount: A$1,200 × 0.10 = A$120
  • Total including GST: A$1,320
Result: Quote displays GST-exclusive and GST-inclusive prices for clients.

New Zealand service retainer

A SaaS vendor calculates price with GST for a monthly plan.

Calculation Steps

  • Base subscription: NZ$350
  • GST rate: 15%
  • GST amount: NZ$350 × 0.15 = NZ$52.50
  • Total including GST: NZ$402.50
Result: Invoice states the GST amount clearly for compliance and customer clarity.

Indian wholesale order

A distributor adds GST for a regional B2B sale.

Calculation Steps

  • Base amount: ₹25,000
  • GST rate: 18%
  • GST amount: ₹25,000 × 0.18 = ₹4,500
  • Total including GST: ₹29,500
Result: Purchase order documents GST-exclusive and GST-inclusive totals with ease.

How to calculate price with GST

Four simple actions to add GST correctly every time.

1

Select your country

Choose the region so the GST exclusive calculator loads the relevant tax defaults and currency symbol.

2

Enter price excluding GST

Type the base amount before tax. This is the figure the add GST calculator uses to compute GST.

3

Adjust the GST rate

Use the default, pick a quick option, or enter a custom rate to mirror your compliance needs.

4

Press Add GST

The tool instantly shows the GST amount and the final price including GST so you can share or record it.

Why professionals rely on this GST exclusive calculator

Key reasons this add GST calculator is the standard for pricing teams and accountants.

Transparent GST breakdown

See the base amount, GST amount, and total including GST side by side so every quote is audit-ready.

Country-ready defaults

Preset rates match Australia, New Zealand, Canada, India, and Singapore while allowing manual tweaks for specialty scenarios.

Speed for invoicing

Sales and finance teams can add GST within seconds, reducing manual spreadsheet edits and pricing errors.

Consistent accuracy

The calculator applies the exact GST formula with currency rounding to keep every GST addition precise and repeatable.

Parameters explained

Each field inside the GST exclusive calculator and how it influences the result.

Country

Determines the default GST rate and the currency format for calculations.

—
Australia / New Zealand / Canada

Price excluding GST

The base amount before tax. This is multiplied by the GST rate to compute the GST amount.

Local currency
100.00

GST rate

Percentage of tax applied to the base price. Adjust to reflect national or industry-specific rates.

%
5 / 10 / 12 / 18

GST exclusive calculation formulas

Mathematics behind the add GST calculator

GST amount

Converts the percentage rate into a decimal and multiplies it by the GST-exclusive price to find the tax component.

GST amount = base price × (GST rate ÷ 100)

Example: Example: $240 × 0.10 = $24 GST

Total including GST

Adds the calculated GST to the base amount in a single multiplication step for faster quoting.

Total price = base price × (1 + GST rate ÷ 100)

Example: Example: $240 × 1.10 = $264 total

GST exclusive calculator FAQs

Answers to frequent questions about adding GST to a GST-exclusive price.

What is a GST exclusive calculator?

It is a tool that converts a price excluding GST into a total including GST by applying the GST formula and displaying the tax amount separately.

Can I adjust the GST rate manually?

Yes. Select a preset rate for your country or type any custom percentage to match special tax scenarios or promotional rates.

Does this add GST calculator support multiple currencies?

The calculator follows the currency of the region you choose and formats the output so invoices remain consistent.

How accurate are the results?

Calculations rely on standard GST formulas and round to two decimal places, giving you professional accuracy for compliance.

When should I use the GST exclusive calculator versus the reverse GST calculator?

Use this tool when you know the base price and need to add GST. Use the reverse GST calculator when you only have a GST-inclusive total and must uncover the base amount.

Disclaimer

This GST exclusive calculator provides general estimates. Tax regulations change, so confirm current rates with official sources and partner with licensed advisors before making financial decisions.