About This Tool
GST Calculator adds GST to a net amount or removes GST from a gross amount and splits tax equally into CGST and SGST. Add: GST = net × rate/100. Remove: net = gross/(1 + rate/100). CGST and SGST each equal half the calculated GST.
What You Can Do
Transparent method
Add: GST = net × rate/100. Remove: net = gross/(1 + rate/100). CGST and SGST each equal half the calculated GST.
Input-driven result
GST Calculator uses amount, 5%, 12%, 18%, or 28% rate, add or remove mode.
Result interpretation
Net, gross, GST, CGST, and SGST amounts
How to Use
- 1
Enter the amount and choose whether it is a net value needing GST added or a gross value containing GST
Enter the amount and choose whether it is a net value needing GST added or a gross value containing GST.
- 2
Select the 5, 12, 18, or 28 percent arithmetic rate
Select the 5, 12, 18, or 28 percent arithmetic rate.
- 3
Calculate net, gross, GST, and the equal CGST and SGST split
Calculate net, gross, GST, and the equal CGST and SGST split.
- 4
Confirm the legally applicable rate and whether IGST or another treatment applies outside this calculation
Confirm the legally applicable rate and whether IGST or another treatment applies outside this calculation.
Practical Use Cases
GST Calculator scenario comparison
Compare how changes to amount, 5%, 12%, 18%, or 28% rate, add or remove mode affect the net, gross, gst, cgst, and sgst amounts.
Arithmetic check
Use GST Calculator to reproduce the documented formula with values you can independently verify.
Privacy and File Processing
Gst Calculator keeps its Amount, 5%, 12%, 18%, or 28% rate, or Add or Remove mode input in browser memory while the operation runs. The workflow creates Net, gross, GST, CGST, and SGST amounts for local preview or download and does not send the entered values or selected file bytes to the GXA Toolbox application server.
Supported Inputs and Outputs
Input
- Amount
- 5%, 12%, 18%, or 28% rate
- Add or Remove mode
Output
- Net, gross, GST, CGST, and SGST amounts
Formula / Method
Add: GST = net × rate/100. Remove: net = gross/(1 + rate/100). CGST and SGST each equal half the calculated GST.
Input Explanation
Amount
Enter the amount used by GST Calculator.
5%, 12%, 18%, or 28% rate
Enter the 5%, 12%, 18%, or 28% rate used by GST Calculator.
Add or Remove mode
Enter the add or remove mode used by GST Calculator.
Understanding the Result
GST Calculator displays net, gross, gst, cgst, and sgst amounts.
Assumptions
- It performs arithmetic and does not determine the legally applicable rate.
- The equal CGST/SGST split does not model IGST or every transaction type.
Quality and Fidelity
Add: GST = net × rate/100. Remove: net = gross/(1 + rate/100). CGST and SGST each equal half the calculated GST.
Limitations and Important Notes
- It performs arithmetic and does not determine the legally applicable rate.
- The equal CGST/SGST split does not model IGST or every transaction type.
Worked Example
Adding 18% GST to ₹1,000 gives ₹180 tax, ₹90 CGST, ₹90 SGST, and ₹1,180 gross.
Helpful Tips
- Check the GST Calculator units and rate periods before calculating.
- Retain enough precision in the net, gross, gst, cgst, and sgst amounts when using it in another calculation.
Frequently Asked Questions
What formula does GST Calculator use?
Add: GST = net × rate/100. Remove: net = gross/(1 + rate/100). CGST and SGST each equal half the calculated GST.
Is the GST Calculator result exact?
The result follows the displayed inputs and browser arithmetic; it performs arithmetic and does not determine the legally applicable rate.
How should I use the GST Calculator result?
Treat it as a calculation from the entered values and account for this documented limit: The equal CGST/SGST split does not model IGST or every transaction type.