GST Calculator
Add or remove GST from any amount.
Amortization schedule
| # | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
Showing first 12 of months.
Growth over time
| Year | Invested | Value |
|---|---|---|
Introduction
GST Calculator — Add or remove GST from any amount. Enter Amount, GST rate (%), Mode to get an instant, accurate result.
Formula
Exclusive (add GST): GST = amount × rate/100. Inclusive (remove GST): GST = amount − amount × 100/(100+rate).
Step-by-step
- Enter the Amount.
- Enter the GST rate (%).
- Enter the Mode.
- Click Calculate to see your result instantly.
Real-world example
Example: With Amount = 1000, GST rate (%) = 18, Mode = exclusive, the GST Calculator gives Gst: 180, Net: 1000, Gross: 1180.
Frequently Asked Questions
What's the difference between exclusive and inclusive mode?
Exclusive assumes your amount does not yet include GST and adds it; inclusive assumes GST is already baked into the amount and extracts it.
Can I use this for any GST rate?
Yes, enter whatever percentage rate applies in your jurisdiction.
What inputs does the GST Calculator need?
You'll need to provide: Amount, GST rate (%), Mode. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the GST Calculator?
The GST Calculator applies the formula exactly as calculated — Exclusive (add GST): GST = amount × rate/100. Inclusive (remove GST): GST = amount − amount × 100/(100+rate). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Are these results guaranteed?
No. The GST Calculator gives an estimate based on the numbers you enter and standard financial formulas — actual rates, fees, taxes, and terms vary by lender, institution, and jurisdiction, and can change over time. This is not financial advice; consult a qualified financial professional for decisions specific to your situation.
Is the GST Calculator free to use?
Yes, the GST Calculator is completely free, requires no signup, and runs instantly in your browser.
About the GST Calculator
The GST Calculator uses a real, verifiable formula — Exclusive (add GST): GST = amount × rate/100. Inclusive (remove GST): GST = amount − amount × 100/(100+rate). — so results are accurate every time, not an approximation.