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Online GST Calculator (₹ INR)

Calculate GST inclusive and exclusive prices, CGST, SGST, and IGST breakdown in Indian Rupees (₹).

100% Free & Accurate Private In-Browser Math
Currency: ₹ INR
₹
Custom GST %:
%
GST Breakdown Type:

Tax Calculation Summary

GST Exclusive
Net / Base Amount
₹ 10,000.00
Total GST (18%)
+ ₹ 1,800.00
Total Gross Price
₹ 11,800.00
Central GST (CGST @ 9%): ₹ 900.00
State GST (SGST @ 9%): ₹ 900.00

How to Calculate GST (Formulas & Practical Guide)

Formula 1

Add GST (GST Exclusive)

Used when you have the base price and need to add GST tax to determine the total selling price.

GST Amount = (Base Amount × GST%) ÷ 100
Total Amount = Base Amount + GST Amount

Example: ₹1,000 with 18% GST = ₹1,000 + ₹180 = ₹1,180 total.

Formula 2

Remove GST (GST Inclusive / Reverse GST)

Used when you have the MRP or final gross price and need to extract the original pre-tax base cost.

Base Amount = (Total Price × 100) ÷ (100 + GST%)
GST Amount = Total Price - Base Amount

Example: ₹1,180 with 18% GST = ₹1,000 base + ₹180 GST.

Indian GST Tax Slabs Reference

Rate Category Common Examples
0% Exempted / Zero Rated Fresh milk, fresh vegetables, unbranded grains, healthcare.
3% Precious Metals Gold, Silver, Platinum jewellery and articles.
5% Essential Items Packaged food, medicines, tea, coffee, edible oil, economy airfare.
12% Standard Goods Butter, cheese, computers, cell phones, processed food, sewing machines.
18% Most Common / Services IT software, banking, restaurants, hair care, cosmetics, capital goods.
28% Luxury & Sin Goods Automobiles, air conditioners, gaming, tobacco, aerated drinks.

Frequently Asked Questions (FAQs)

What is the difference between GST Inclusive and GST Exclusive?

GST Exclusive means the quoted price does not yet include tax. You must add the GST percentage to find the final billing price.
GST Inclusive means the displayed price already has GST incorporated into it. The calculator works in reverse to extract the pre-tax base cost and the embedded tax component.

What are CGST, SGST, and IGST?

• CGST (Central GST) and SGST (State GST) apply for intra-state transactions (within the same state). The total tax rate is equally divided (50% to the Central Government and 50% to the State).
• IGST (Integrated GST) applies to inter-state sales (between two different states) and goes entirely to the Central Government.

How do I calculate 3% GST on Gold jewellery?

Simply click the 3% preset button above. The calculator will compute 1.5% CGST and 1.5% SGST on your gold value automatically.

Why Use CalcFlex?

  • Instant Real-Time Math

    Calculates in ₹ (INR) as you type with zero lag.

  • Dual Mode Support

    Add GST to base price or extract reverse GST from MRP.

  • Official Indian Tax Slabs

    Preset rates for 3% (Gold), 5%, 12%, 18%, 28%.

  • Tax Split Automation

    50/50 CGST + SGST or 100% IGST breakdowns.

  • 100% Client-Side Privacy

    Your financial numbers never leave your browser.

  • 1-Click Summary Copy

    Fast formatted text copy for quotes & bills.

Other Online Tools

Quick User Guide

  1. Choose Add GST (Exclusive) or Remove GST (Inclusive).
  2. Enter your amount in Rupees (₹).
  3. Click a standard tax rate (3%, 5%, 12%, 18%, 28%) or slide for a custom rate.
  4. View the instant itemized tax breakdown and click Copy Calculation Breakdown.