GST Calculator
Calculate GST amount, CGST, SGST, IGST, and final price quickly and accurately with our free online GST Calculator.
GST Details
Why Use SmartBoxTool GST Calculator?
Quickly calculate GST and understand your tax breakdown with a simple online tool.
100% Free
Calculate GST online without registration or subscription barriers.
Instant Results
Get GST and final amount calculations instantly as you type.
Mobile Friendly
Use the calculator smoothly on phones, tablets, and desktops.
Easy Calculation
Enter the amount and GST rate or custom rate to calculate your tax quickly.
Detailed Breakdown
See CGST, SGST, IGST, and final amount clearly separated.
No Registration
No account or private sign-up is required to use the GST calculator.
How Is GST Calculated?
When GST is added to a price, the GST amount can be calculated by multiplying the original amount by the GST rate and dividing by 100.
Example
If the original amount is ₹10,000 and the GST rate is 18%:
GST = ₹10,000 × 18 ÷ 100 = ₹1,800 Final Amount = ₹10,000 + ₹1,800 = ₹11,800How to Use the GST Calculator?
Enter Amount
Input the original or GST-inclusive amount.
Select GST Rate
Choose the standard slab or specify a custom rate percentage.
Choose Tax Type
Toggle between CGST + SGST or IGST distributions.
View Results
Review the comprehensive tax distribution instantly.
Frequently Asked Questions
What is GST?
GST stands for Goods and Services Tax. It is a comprehensive indirect tax applied to the supply of goods and services across the economy.
What is CGST and SGST?
For intra-state transactions, GST is split equally into Central GST (CGST) collected by the central government and State GST (SGST) collected by the state government.
What is IGST?
IGST stands for Integrated Goods and Services Tax, which is levied on inter-state supplies and imports, collected by the central government.
Can I remove GST from an inclusive price?
Yes. Select the "Remove GST" toggle option and enter the inclusive amount to automatically reverse-calculate the original base price and tax component.
Is SmartBoxTool GST Calculator free?
Yes. Our GST Calculator is completely free to use online without any limitations.