GST Calculator
Add GST to a price or remove it from a GST-inclusive amount, with the CGST and SGST split shown.
- Taxable value
- —
- GST
- —
- CGST
- —
- SGST
- —
Arithmetic only. Confirm the rate and place of supply with the official GST rules or your accountant.
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What is the GST Calculator?
This calculator adds GST to a base amount or removes GST from a GST-inclusive amount, using the rate you type. It shows the taxable value, the total GST, the CGST and SGST halves, and the final total, so you can check an invoice line quickly.
How it works
In add mode, GST equals the amount multiplied by the rate divided by 100, and the total is amount plus GST. In remove mode, the taxable value is the amount divided by one plus the rate over 100, and GST is the difference. CGST and SGST are each exactly half of the GST.
How to use it
- Type the amount.
- Type the GST rate that applies to your item.
- Choose whether to add GST or remove it from the amount.
- Read the taxable value, CGST, SGST and total.
GST Calculator — FAQ
Does this calculator know the correct GST rate?
No. You type the rate yourself, because rates differ by item and can change. Check the current official rate for your product or service.
Why is GST split into CGST and SGST?
For a supply within one state, the tax is shown as two equal halves, central and state. This tool simply divides the total GST by two.
What about inter-state sales?
For inter-state supply a single integrated tax is shown instead of two halves. The total GST here is still correct; ignore the CGST and SGST split.