GST Calculator
Calculate GST amount, pre-GST amount, post-GST amount, CGST, SGST, and IGST using this simple GST calculator.
Enter GST Details
GST Summary
Insight
GST can be added to a base amount or removed from an inclusive invoice amount.
Base Amount vs GST
GST Impact by Rate
GST Breakdown Table
| Metric | Value | Meaning |
|---|
What is GST?
GST stands for Goods and Services Tax. It is an indirect tax applied on the supply of goods and services in India.
How This GST Calculator Works
This calculator works in two ways. If your amount is before GST, it adds GST and shows the final invoice amount. If your amount already includes GST, it removes GST and shows the base amount and GST amount separately.
GST Formula
When GST is added: GST Amount = Base Amount × GST Rate ÷ 100
When GST is included: Base Amount = Invoice Amount ÷ (1 + GST Rate ÷ 100)
Benefits of Using a GST Calculator
- Helps calculate GST quickly
- Shows base amount and final invoice amount
- Useful for invoices, quotations, and billing
- Shows CGST and SGST split for intra-state supply
- Shows IGST for inter-state supply
GST Calculation Example
Suppose the base amount is ₹1,00,000 and GST rate is 18%. GST will be ₹18,000 and the final invoice amount will be ₹1,18,000.
Frequently Asked Questions
What does GST Calculator show?
It shows GST amount, base amount, final amount, CGST, SGST, and IGST based on the selected calculation type and supply type.
Can I remove GST from an inclusive amount?
Yes. Select “Amount is After GST – Remove GST” to calculate the base amount and GST included in the invoice amount.
What is CGST and SGST?
For intra-state supply, GST is usually split into CGST and SGST. This calculator divides the GST amount equally between CGST and SGST.
What is IGST?
For inter-state supply, GST is generally shown as IGST. This calculator shows the full GST amount as IGST when inter-state supply is selected.
Can I change GST rate?
Yes. The GST rate field is editable, so you can use the rate applicable to your goods or services.
Is this calculator enough for GST filing?
No. This calculator is for quick estimation only. GST filing and compliance should be done according to official rules and professional advice where needed.
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