Calculators
About the GST Calculator
The GST Calculator is a free online calculator from Toolbench. Add or remove GST, with CGST / SGST split. Enter your numbers and the answer — with the formula used — updates as you type.
- Category
- Calculators
- Price
- Free
- Account
- Not required
- Runs
- Entirely in your browser
How to use the GST Calculator
- Enter the values (mode, gst rate %).
- Read the result — it updates as you type.
- Check the breakdown rows to see exactly how it was calculated.
Worked example
| Mode | Add GST |
|---|---|
| Amount excl. GST | 1000 |
| GST rate % | 18% |
| Amount incl. GST | 1,180.00 |
| Net amount | 1,000.00 |
| GST (18%) | 180.00 |
| Gross amount | 1,180.00 |
| CGST (9%) | 90.00 |
| SGST (9%) | 90.00 |
Formula: Adding GST: total = amount × (1 + rate ÷ 100). Removing GST: amount = total ÷ (1 + rate ÷ 100). In India, intra-state GST splits evenly into CGST and SGST.
Inputs
| Mode | Add GST · Remove GST (inclusive) |
|---|---|
| GST rate % | 5% · 10% · 12% · 15% · 18% · 28% |
Privacy
Everything runs in your browser: what you type or paste is processed by JavaScript on your device, not on a server. If you are signed out, nothing is saved at all. If you sign in with Google, your inputs and settings are saved privately to your account so they sync across devices.
Frequently asked questions
Is the GST Calculator free?
Yes. GST Calculator is completely free with no sign-up, no usage limits and no watermarks.
Is my data private?
Yes. The GST Calculator processes everything in your browser. Signed out, nothing is saved; signed in, your inputs sync privately to your own account.
How does the gst calculation work?
Adding GST: total = amount × (1 + rate ÷ 100). Removing GST: amount = total ÷ (1 + rate ÷ 100). In India, intra-state GST splits evenly into CGST and SGST.
Does it work on my phone?
Yes. Toolbench runs in any modern browser on desktop, tablet or phone — there is nothing to install.
Related calculators
- Stripe Fee CalculatorWhat you receive after Stripe fees, or what to charge.
- CPM CalculatorSolve for CPM, total cost or impressions.
- Loan CalculatorMonthly payment, total interest and payoff date.
- Days CalculatorDays, weeks and business days between two dates.
- Hours CalculatorHours worked between two times, minus breaks, with pay.
- Month CalculatorMonths between two dates, or a date plus N months.
- Calorie CalculatorDaily calories to maintain, lose or gain weight.
- TDEE CalculatorTotal daily energy expenditure, BMR and BMI.
Last updated