GST Calculator
Calculate GST at 5%, 12%, 18% or 28%. Add GST to a base price or extract GST from an inclusive price.
What this calculator does
Use this GST calculator to estimate the tax component and final price. Choose whether the entered amount is before GST or already includes GST, then select the rate applicable to the goods or services. Verify classification and current rates before invoicing.
How to use it
- Enter the amount
- choose add/remove GST
- select the rate
- review taxable value, GST and total.
Formula and calculation method
Worked example
Important information
GST is generally split into CGST and SGST for intra-state supplies, while IGST generally applies to inter-state supplies. This tool shows combined GST. Select a rate only after checking official classification guidance.
Frequently asked questions
How accurate is this calculator?
It provides an estimate based on the values and assumptions entered. Verify important decisions with the relevant provider or a qualified professional.
Does this replace professional advice?
No. It is an informational tool and does not replace tax, legal, accounting, lending, investment or medical advice.
Practical GST example: inclusive and exclusive prices
Suppose a product has a taxable value of ₹10,000 and the applicable GST rate is 18%. GST is ₹1,800 and the invoice total is ₹11,800. If the displayed price is already ₹11,800 inclusive of 18% GST, divide by 1.18 to estimate the taxable value; the balance is the embedded GST.
Check before using the result
The correct GST rate depends on the product or service classification and applicable rules. Place of supply can also affect whether tax is treated as CGST plus SGST or IGST. This calculator performs arithmetic; it does not determine classification, eligibility for input tax credit or legal tax treatment. Verify the current rate and invoice requirements with official GST guidance or a qualified tax professional.
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Browse all calculators AboutResults are estimates based on entered values and assumptions. They are not professional advice. Verify important decisions with the relevant provider or a qualified professional.