Calculators
GST Calculator
Add or remove GST at 5%, 12%, 18% or 28%.
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About this gst calculator
GST can be calculated two ways: adding it to a net price, or extracting it from a gross price that already includes it. Getting the direction wrong is the most common mistake.
This calculator does both and splits the result into CGST and SGST for intra-state supply, or shows it as IGST for inter-state.
How to use it
- Choose whether your amount excludes or includes GST.
- Enter the amount and pick a rate slab.
- Read the GST amount, the CGST/SGST split and the final total.
GST Calculator — FAQ
How do I remove GST from a total?
Divide the gross amount by (1 + rate/100). At 18%, divide by 1.18. The 'amount includes GST' mode does this for you.
What is the CGST and SGST split?
For supply within a state the total rate is split equally between central and state GST — 18% becomes 9% CGST and 9% SGST.
Is this official?
No. It is a convenience calculator; confirm rates and treatment with a qualified tax professional.
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