GST Calculator

Use BharatUtility's free GST Calculator to compute GST inclusive or exclusive amounts instantly. Select or enter any GST rate slab (5%, 12%, 18%, 28%) to get immediate CGST, SGST, IGST, and gross total breakdowns.

Interactive GST Calculator
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Formula & Calculation Methodology

GST Exclusive Formula: GST = Amount × (Rate / 100) | GST Inclusive Formula: GST = Amount − [ Amount × 100 / (100 + Rate) ]

	ext{GST}_{excl} = P 	imes rac{R}{100}, quad 	ext{GST}_{incl} = P - rac{P 	imes 100}{100 + R}

Step-by-Step Worked Example

Base Amount: ₹10,00,000 | GST Rate: 18% GST (Exclusive) | Intrastate Sale (CGST + SGST)

  1. Total GST Amount = 10,000 × (18 / 100) = ₹1,800
  2. CGST (9%) = ₹900 | SGST (9%) = ₹900
  3. Gross Invoice Total = ₹10,000 + ₹1,800 = ₹11,800
Result: Base Amount: ₹10,000 | CGST (9%): ₹900 | SGST (9%): ₹900 | Total Invoice: ₹11,800

What is GST?

Goods and Services Tax (GST) is an indirect comprehensive tax levied on the supply of goods and services in India. Introduced in July 2017 to replace multiple cascading central and state taxes (VAT, service tax, excise duty), GST consolidates taxation under a unified national structure.

How GST Calculator Works

BharatUtility’s GST Calculator allows business owners, freelancers, traders, and consumers to calculate GST amounts in two modes:

1. Add GST (GST Exclusive): Calculates the tax to be added on top of a net base price.

2. Remove GST (GST Inclusive): Extracts the original pre-tax price from a total gross price that already includes GST.

GST Inclusive Calculation

When a product’s price already includes GST, use the inclusive formula to determine the base cost and tax component:

GST Amount = Gross Amount − [ Gross Amount × 100 / (100 + GST Rate) ]

Pre-Tax Base Amount = Gross Amount − GST Amount

GST Exclusive Calculation

When quoting a net price before tax, use the exclusive formula:

GST Amount = Base Amount × (GST Rate / 100)

Gross Total Price = Base Amount + GST Amount

GST Formula

  • Exclusive GST = Price × (Rate / 100)
  • Inclusive GST = Price − (Price / (1 + Rate / 100))
  • CGST = Total GST / 2 (for intrastate transactions)
  • SGST = Total GST / 2 (for intrastate transactions)
  • IGST = Total GST (for interstate transactions)

CGST, SGST, and IGST Explained

  • CGST (Central GST): Tax collected by the Central Government on intrastate sales.
  • SGST (State GST): Tax collected by the State Government on intrastate sales.
  • IGST (Integrated GST): Tax levied by the Central Government on interstate sales and imports, shared between Central and destination State governments.

GST Calculation Example

Consider a product with a net base price of ₹10,000 and an 18% GST rate:

1. GST Amount = ₹10,000 × 18% = ₹1,800

2. Intrastate Breakdown: CGST (9%) = ₹900, SGST (9%) = ₹900

3. Final Billing Price = ₹11,800

How to Calculate GST Manually

1. Identify the net price and applicable GST slab rate (5%, 12%, 18%, 28%).

2. For Exclusive GST: Multiply net price by GST rate decimal (e.g., 0.18 for 18%).

3. For Inclusive GST: Divide total price by (1 + GST rate decimal), e.g., divide by 1.18 for 18%.

4. Split the GST amount equally between CGST and SGST for local sales.

Frequently Asked Questions

What is GST?

GST (Goods and Services Tax) is a single unified indirect tax levied on the manufacture, sale, and consumption of goods and services throughout India.

How is GST calculated?

For exclusive GST: GST = Base Price × GST Rate %. For inclusive GST: GST = Total Price − [Total Price × 100 / (100 + GST Rate %)].

What are the main GST rate slabs in India?

India has four primary tax slabs: 5% (essential goods), 12% (standard items), 18% (most services and consumer goods), and 28% (luxury items and motor vehicles).

What is the difference between CGST, SGST, and IGST?

CGST and SGST apply to intra-state sales (within the same state) and split the tax rate 50-50. IGST applies to inter-state sales (across state borders).

What is GST Inclusive?

GST Inclusive means the total price displayed already includes the GST tax component.

What is GST Exclusive?

GST Exclusive means the base price does not include tax; GST must be added on top to find the final billing amount.

How do I calculate 18% GST on ₹1,000?

For GST Exclusive: 1,000 × 18% = ₹180 GST (Total = ₹1,180). For GST Inclusive: 1,000 − (1,000 / 1.18) = ₹152.54 GST (Base = ₹847.46).

Is this GST calculator free?

Yes, BharatUtility’s GST calculator is 100% free with instant calculations and zero sign-up requirements.

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