GST Calculator
Add or remove GST from an amount and view the base price and tax breakdown.
Processed in your browserA simpler way to use the gst calculator
Calculate the arithmetic of adding or removing a GST percentage. Exclusive mode adds amount × rate ÷ 100. Inclusive mode finds the base using total ÷ (1 + rate ÷ 100). The displayed CGST and SGST split divides the tax equally and is illustrative; actual applicability, rates, and rounding depend on your transaction. Select the rate that applies to you.
How it works
- Enter an amount and the GST percentage you want to calculate.
- Choose whether that amount includes or excludes GST.
- Calculate to see the base, total tax, and final amount.
Your data stays with you.
Your file and form inputs don’t leave your device. This tool works locally in your browser. We only save recently opened tool names and optional feedback on this device.
What does GST Calculator do?
Add or remove GST from an amount and view the base price and tax breakdown.
- Cost and account
- Free to use. No account required.
- Processing
- In this browser
- Device requirements
- Desktop, tablet or phone with a supported modern browser; file and memory limits still apply.
Example
Input: Exclusive mode; base amount 1,000; supplied rate 18%.
Result: Tax 180 and total 1,180. This example illustrates arithmetic, not which tax rate applies.
Frequently asked questions
Does this tool choose my GST rate?
No. It performs arithmetic using your chosen rate. Presets are input shortcuts, not a statement of current tax law. Confirm applicable rates and transaction rules separately.
What is inclusive GST?
Inclusive means the entered amount already contains the tax. The calculator removes the tax portion to find the original base amount.
How are amounts rounded?
The displayed values are rounded to two decimal places using the browser’s number formatting. Follow the rounding requirements applicable to your invoice or filing.