GST Calculator — Add or Remove GST Instantly
Free online GST calculator for all slab rates 5% 12% 18% 28%. Calculate GST inclusive and exclusive amounts with CGST SGST and IGST breakdowns.
Goods and Services Tax is a comprehensive indirect tax that replaced multiple taxes like VAT excise duty and service tax when it was introduced on July 1 2017. Whether you are a business owner creating invoices a freelancer calculating service tax or a consumer wanting to know the tax component of a purchase our GST calculator makes it simple. Just enter the amount and GST rate to get instant results with CGST SGST and IGST breakdowns.
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GST Calculator
Key Information
| Parameter | Details |
|---|---|
| GST Slab Rates | 5%, 12%, 18%, 28% |
| For Intra-State Sales | CGST + SGST (equal split) |
| For Inter-State Sales | IGST (full rate) |
| GST Registration Threshold | Rs 40 lakh (Rs 20 lakh for services) |
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Use Calculator NowFrequently Asked Questions
What are the different GST rates in India?
India has four GST slab rates. 5% applies to essential items like packaged food and economy rail tickets. 12% applies to cell phones computers and processed food. 18% covers most services and standard goods including restaurant dining. 28% is reserved for luxury items like automobiles premium electronics and aerated drinks. Some items like unpackaged food grains are exempt at 0%.
How to calculate GST from total amount?
To find the GST component from a GST-inclusive total use this formula: GST Amount = Total Amount x GST Rate divided by (100 + GST Rate). For example if your total bill is Rs 1180 with 18% GST then GST = 1180 x 18 / 118 = Rs 180 and the base amount is Rs 1000.
Do I need GST registration?
You need GST registration if your annual turnover exceeds Rs 40 lakh for goods or Rs 20 lakh for services. These thresholds are Rs 20 lakh and Rs 10 lakh respectively for North-Eastern states. E-commerce sellers interstate sellers and those making taxable supplies must register regardless of turnover.
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Last updated: 24 March 2026