Goods & Services Tax (GST) Calculator
Quickly add or remove GST (CGST & SGST) tax percentage rates to find net price, gross price, and actual tax amount.
GST Calculation Breakdown
Understand the tax components of your commercial transactions:
Net / Base Price
The price of the item before adding GST tax.
GST Amount
The tax value (often split 50/50 into Central CGST and State SGST).
Gross Price
The final, invoice-ready cost inclusive of all GST taxes.
How is it calculated?
GST = Base \times \frac{Rate}{100} \quad | \quad Base = Gross \times \frac{100}{100 + Rate}Use the first formula to add GST to a base price. Use the second formula to remove/deduct GST from a gross retail price.
Worked Examples
Adding 18% GST to ₹10,000 Base Cost
For a base cost of ₹10,000, 18% GST adds ₹1,800 (split into ₹900 CGST and ₹900 SGST), resulting in a total retail price of ₹11,800.
Deducting 18% GST from ₹11,800 Retail Price
If a product retails at ₹11,800 inclusive of 18% GST, the original cost is ₹10,000, and the tax component is ₹1,800.
Frequently Asked Questions
What is the difference between CGST, SGST, and IGST?
What are the main GST tax slab rates?
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Results are estimates and should not be considered financial advice.