GST Calculator: Goods and Services Tax and Total
Work out the goods and services tax on a price and the total payable, for a country that levies GST.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | GST | Total |
|---|---|---|
| $800 net · 5% | $40.00 | $840.00 |
| $800 net · 10% | $80.00 | $880.00 |
| $1,500 net · 15% | $225.00 | $1,725.00 |
| $300 net · 18% | $54.00 | $354.00 |
How This Calculator Works
Enter the net amount and the GST rate for the country of sale. The calculator multiplies the amount by the rate to find the GST, then adds it for the total. GST is a value-added consumption tax used in Canada, Australia, India, New Zealand, Singapore, and elsewhere, though the rate differs sharply between them.
The Formula
Percentage Add-On
Rate is the tax or tip percentage applied to the amount
Worked Example
On a net amount of $800 at a 5% GST rate, the GST is $40 and the total is $840. A 5% rate is the federal GST in Canada; other countries set their GST much higher, so the rate matters more than any default.
Key Insight
GST rates vary enormously — 5% in Canada, 10% in Australia, 15% in New Zealand, and higher in India. Some countries also stack a provincial or state tax on top, so always confirm the combined rate for the place of sale.
Frequently Asked Questions
What is GST?
Goods and services tax is a value-added consumption tax charged on most sales. It works much like VAT: businesses collect it on sales and reclaim it on purchases, with the consumer bearing the final cost.
How is GST different from VAT?
Mechanically they are almost identical consumption taxes; the name simply differs by country. Some GST countries also add a separate provincial or state sales tax alongside it.
What GST rate should I enter?
Use the rate for the country of sale — for example 5% in Canada or 10% in Australia. Where a provincial tax also applies, enter the combined rate.
Is GST included in displayed prices?
It depends on the country. Australia includes GST in displayed prices, while in Canada GST is often added at the register. Check local convention.
Can businesses reclaim GST?
Registered businesses generally reclaim the GST paid on their purchases, so GST is not a final cost for them. The tax falls on the end consumer.
Related Calculators
Data Sources & Benchmarks
This calculator draws on 2 independent, dated sources.
Methodology & Review
GST is the net amount multiplied by the rate; the total adds the GST to the net amount. The calculator uses a single GST rate and does not add any separate provincial or state tax.
Written by Ugo Candido · Last updated May 17, 2026.