TetraKitsGST Calculator
Calculate Goods and Services Tax for business quotes, invoices, and BAS returns. Add GST to a net price or back out GST from a gross total — with presets for Australia (10%), New Zealand (15%), India (18%), and Singapore (9%).
Read: GST Calculator Guide: Add & Remove Goods and Services Tax →
- Free to Use
- No Signup
- Privacy Friendly
How to calculate GST
- 1
Pick add or remove
Add GST when quoting from a net price. Remove GST when you have a tax-inclusive receipt and need the pre-tax amount.
- 2
Use a country preset
Click AU (10%), NZ (15%), IN (18%), or SG (9%), or enter any custom rate for your jurisdiction.
- 3
Review GST breakdown
See net, GST amount, and gross in one panel. For European VAT, use the VAT calculator.
GST formulas
Example: A$100 net + 10% GST → A$10 GST, A$110 gross.
Why Use This Tool?
Add or Remove
Calculate GST forward from net or backward from tax-inclusive prices.
Country Presets
One-click rates for Australia, New Zealand, India, and Singapore.
Business Ready
Quick totals for quotes, receipts, and BAS/GST returns.
Local Only
Your figures never leave the browser.
Frequently Asked Questions
What is the GST rate in Australia?
The standard GST rate in Australia is 10%. Most goods and services are taxable; some items like basic food and health services may be GST-free.
How do I calculate GST from a gross price in India?
Select Remove GST, enter the tax-inclusive amount, set rate to 18%. Net = gross ÷ 1.18. GST = gross − net.
What is the difference between GST and VAT?
Both are consumption taxes on goods and services. GST is the term used in Australia, New Zealand, India, and several other countries; VAT is used in Europe and the UK.
Can I use a custom GST rate?
Yes. Enter any percentage in the rate field — presets are shortcuts for common country standard rates.
Is this GST calculator free?
Yes. Free, private, and unlimited with no account required.
GST Math for APAC Business
Australian BAS lodgements, New Zealand invoice totals, Indian GST compliance, and Singapore business quotes all require accurate net/GST/gross splits. Country presets plus custom rates make this calculator ready for real-world bookkeeping — not just textbook examples.
