GST Calculator
Enter an amount and GST rate to add GST (from net) and remove GST (from gross).
How to use this calculator
- 1Enter the amount you are working from.
- 2Enter your GST rate (10% Australia, 15% New Zealand, 18% India, and so on).
- 3Read the gross (GST added) and net (GST removed) figures.
How the GST Calculator works
GST (goods and services tax) is a broad consumption tax added to most sales in countries like Australia, New Zealand, India, Canada and Singapore. To add GST you multiply the net price by one plus the rate; to find the GST already inside a gross price you divide by one plus the rate. This tool shows both at once.
Rates differ by country — 10% in Australia, 15% in New Zealand, and several slabs in India — so set the rate that applies to you. If you are GST-registered you generally charge it on sales and reclaim it on purchases, so getting the split right keeps your bookkeeping clean.
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Create an invoice freeFrequently asked questions
How do I add GST?
Multiply the net amount by (1 + rate ÷ 100). At 10% GST, a $1,000 net becomes $1,100 gross.
How do I remove GST from a total?
Divide the gross amount by (1 + rate ÷ 100). At 10%, a $1,100 total contains $100 of GST and $1,000 net.
What GST rate should I use?
It depends on your country: 10% in Australia, 15% in New Zealand, 5% in Canada (plus provincial), and multiple slabs in India. Set the rate that applies to you.
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