What is GST / Tax Calculator?
A GST or tax calculator works out the tax portion of a price, whether you need to add tax to a net amount or extract the tax already included in a gross amount. It applies to Goods and Services Tax (GST), Value Added Tax (VAT) and general sales tax at any rate you enter.
The tool clearly separates the net amount, the tax and the gross total, so invoices, receipts and pricing are always transparent.
How to Use the GST / Tax Calculator
- Enter the amount you are working with.
- Enter the tax rate as a percentage.
- Choose whether to add tax to a net amount or remove tax from a gross amount.
- See the net, tax and gross figures update instantly.
Features of Our GST / Tax Calculator
- Add tax to a net price or remove tax from a gross price
- Works for GST, VAT and sales tax at any rate
- Clear breakdown of net, tax and gross
- Live recalculation as you type
- Currency-agnostic results
- Instant and fully offline
Benefits & Use Cases
Freelancers and businesses prepare invoices, shoppers check tax-inclusive prices, and accountants verify figures. The remove-tax mode is especially useful for extracting the tax component from a total that already includes it.
Everything is calculated locally, so your financial figures stay private and results are instant.
The GST / Tax Calculator is completely free, needs no sign-up or installation, and runs entirely in your browser — nothing you enter is uploaded to a server, so your data stays private. It works on desktop, tablet and mobile, in light or dark mode.
Tips & Best Practices
Use Add tax when your figure is the net (pre-tax) amount, and Remove tax when your figure already includes tax and you need to pull out the tax portion — the reverse calculation freelancers need for invoices. The clear net / tax / gross breakdown works for GST, VAT or any sales-tax rate you enter.
Spell the invoice total out in words with Number to Words, and apply any discount before tax with the Discount Calculator.
FAQ about GST / Tax Calculator
What does 'remove tax' mode do?
It treats your amount as tax-inclusive (gross) and works backwards to find the original net price and the tax portion within it.
Can I use it for VAT or sales tax?
Yes. The calculator simply applies whatever percentage you enter, so it works for GST, VAT, sales tax or any similar tax.
How is included tax extracted?
The net amount equals the gross divided by (1 + rate/100). The tax is the difference between the gross and that net amount.
Does it support any currency?
Yes. It works purely with numbers, so the results are valid in any currency you use.