Home Math & Calculator Tools GST / Tax Calculator
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Math & Calculator Tools

GST / Tax Calculator

Add or remove GST, VAT or sales tax from any amount — with CGST/SGST split, effective rate and complete pre/post-tax price breakdown.

⚡ Instant calculation 🔒 Private — runs in your browser 🚫 No login required 📋 Copy or download results
🧾 GST / Tax Calculator
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Enter your figures and click Calculate to see your results.

📖How to Use the GST / Tax Calculator

  1. 1
    Enter your values

    Enter the amount and tax rate — choose whether to add tax to a net price or extract it from a gross (tax-inclusive) price.

  2. 2
    Click Calculate

    Press the Calculate button. All results appear instantly — no page reload, no waiting.

  3. 3
    Read and use your results

    Results appear in the panel on the right with all key values clearly labelled. Use Copy to grab the result or Download to save a text file.

💡When to Use This Calculator

SituationWhy It Helps
Financial planning Make informed decisions
Business analysis Support data-driven choices
Personal finance Understand your numbers

Frequently Asked Questions

How do I add GST to a price?

GST Amount = Price × Rate / 100. Final Price = Price + GST Amount. For ₹1,000 at 18%: GST = ₹180, Final = ₹1,180. This is called exclusive pricing — the listed price does not include tax and the GST is added on top.

How do I remove GST from an inclusive price?

Pre-tax Price = Inclusive Price / (1 + Rate/100). For ₹1,180 at 18%: ₹1,180 / 1.18 = ₹1,000. GST Amount = ₹1,180 − ₹1,000 = ₹180. This reverse calculation is used when the price shown already includes GST and you need to find the base price.

What GST rates are used in India?

India has four standard GST rates: 5% for essential goods (sugar, tea, medicines), 12% for standard goods (frozen food, butter), 18% for electronics, restaurants and most services, and 28% for luxury goods, tobacco and aerated drinks. Some items are exempt (0%): basic unprocessed food, educational services and exports.

What is the difference between CGST and SGST?

On intrastate (within same state) transactions, GST is split equally: half goes to the central government as CGST and half to the state government as SGST. For 18% GST: CGST = 9% + SGST = 9%. On interstate transactions, IGST applies at the full rate. This calculator shows the CGST/SGST split automatically.

What is input tax credit under GST?

Input Tax Credit (ITC) allows GST-registered businesses to deduct GST paid on purchases from GST collected on sales. If you pay ₹1,000 GST on raw materials and collect ₹1,800 GST on finished goods, you only remit ₹800 to the government. ITC prevents cascading (tax on tax) that existed under the old VAT system.