What is the GST Calculator?
The gst calculator is a free online tool that helps you work out gst quickly and accurately. It uses the standard formula Add: GST = Amount x rate/100. Remove: Net = Amount x 100/(100+rate) and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter the amount.
- Enter the GST rate (5/12/18/28%).
- Choose whether to add or remove GST.
- See GST, net and gross amounts.
Formula used
Add: GST = Amount x rate/100. Remove: Net = Amount x 100/(100+rate)Explanation of each input
- Amount โ the amount used in the calculation.
- GST rate (%) โ the gst rate used in the calculation.
- Calculation type โ the calculation type used in the calculation.
Understanding your result
- GST amount โ the calculated gst amount.
- Net amount โ the calculated net amount.
- Total amount โ the calculated total amount.
Step-by-step calculation
For the example values 1000 + 18% GST:
- Apply the formula:
Add: GST = Amount x rate/100. Remove: Net = Amount x 100/(100+rate) - Substitute the values: GST = 1000 x 0.18 = 180
- Result: GST 180; total 1180
Worked example
| Inputs | 1000 + 18% GST |
|---|---|
| Working | GST = 1000 x 0.18 = 180 |
| Result | GST 180; total 1180 |
Benefits and practical uses
This calculator saves you time and reduces errors when you need gst. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- A single GST rate (not split by item).
- Rate as entered by the user.
Frequently asked questions
What are the GST slabs in India?
Common GST rates are 0%, 5%, 12%, 18% and 28%. The exact rate depends on the goods or services.
What is CGST and SGST?
For intra-state sales GST splits equally into CGST and SGST; inter-state sales attract IGST.