Finance & money · Tax
GST / VAT Calculator
Calculate GST or VAT by adding tax to a price or removing tax from an inclusive amount. Works with any tax rate. Free tax-inclusive and tax-exclusive calculator.
How it works
Calculates GST (Goods & Services Tax) or VAT (Value Added Tax) in two modes: adding tax to an exclusive price, or extracting tax from an inclusive price. Works with any tax rate.
Step by step
- 1Enter the amount and tax rate.
- 2Choose 'Add tax' if your amount is already the pre-tax price and you want to find the total.
- 3Choose 'Remove tax' if your amount already includes tax and you want to find the pre-tax price.
- 4The tool shows pre-tax amount, tax amount, and total.
Examples
Add 10% GST to $100
$100 × 10% = $10 GST; total = $110.
Inputs
- amount:
- 100
- rate:
- 10
- mode:
- add
Result
- pre_tax:
- $100.00
- tax_amount:
- $10.00
- total:
- $110.00
Remove 20% VAT from £120
If £120 includes 20% VAT: pre-tax = £120 ÷ 1.20 = £100; VAT = £20.
Inputs
- amount:
- 120
- rate:
- 20
- mode:
- remove
Result
- pre_tax:
- $100.00
- tax_amount:
- $20.00
- total:
- $120.00
Frequently asked questions
What is the difference between GST and VAT?▾
Both are consumption taxes charged as a percentage of a good or service's price. GST (Goods and Services Tax) is used in countries like Australia, Canada, and India. VAT (Value Added Tax) is used in the EU and UK. The calculation method is identical.
How do I remove VAT from a price?▾
Divide the VAT-inclusive price by (1 + rate/100). For example, to remove 20% VAT from £120: £120 ÷ 1.20 = £100 pre-tax, £20 VAT.