What is a GST calculator?

A GST calculator is an online tool that helps calculate GST amount, taxable value and final invoice value based on the selected GST rate.

Can I calculate CGST and SGST with this calculator?

Yes. For intra-state transactions, the calculator splits GST equally into CGST and SGST.

Can I calculate IGST with this calculator?

Yes. For inter-state transactions, the calculator shows the full GST amount as IGST.

What is the formula to calculate GST?

The basic formula is: GST Amount = Taxable Value × GST Rate ÷ 100. The final invoice value is taxable value plus GST amount.

How do I remove GST from an inclusive amount?

Use the GST-inclusive calculation. The formula is: Base Value = Inclusive Amount × 100 ÷ (100 + GST Rate). GST amount is the difference between inclusive amount and base value.

What is the difference between GST-inclusive and GST-exclusive price?

A GST-exclusive price does not include GST, so tax is added separately. A GST-inclusive price already includes GST in the final amount.

Which GST rate should I use?

The GST rate depends on the goods or services, HSN code, SAC code and latest GST notifications. Always verify the applicable rate before issuing invoices.

Is GST charged on exports from India?

Exports are generally treated as zero-rated supplies under GST, subject to applicable conditions and documentation.

What is the GST rate on services vs goods?

GST rates for both goods and services depend on their classification. Many standard services fall under 18%, but some goods and services may be exempt, taxed at 5%, or covered under special notified rates.

Is BUSY’s GST Calculator free?

Yes. BUSY’s GST Calculator is free to use and works on desktop and mobile browsers.

How does this connect with BUSY accounting software?

BUSY helps businesses create GST invoices, manage accounting, track inventory, calculate taxes, reconcile returns, generate e-way bills and manage e-invoices from one place.

Free Online GST Calculator for Accurate GST Amount Calculation

Q: How does BUSY’s GST Calculator work?

You enter the amount, select the GST rate and choose whether the amount is GST-inclusive or GST-exclusive. The calculator then shows the GST amount and final value.

GST Calculator

Calculate your Goods and Services Tax with ease.

Amount

₹

GST Type

Exclusive Inclusive

GST Rate (%)

Supply Type

Intra-state Inter-state

Quick Summary

Total Items: 1 (Single Amount Entry)

Applied GST Rate: 5%

Supply Type: Intra-state

Financial Breakdown

Taxable Value ₹ 0.00

CGST ₹ 0.00

SGST ₹ 0.00

IGST ₹ 0.00

Total Amount ₹ 0.00

Need to calculate GST on a product, service, invoice, purchase bill, or sale value? BUSY's GST Calculator helps you quickly calculate the GST amount, base value, CGST, SGST, IGST and total invoice value in a simple format.

The calculator is useful for business owners, accountants, GST-registered dealers, freelancers, consultants, retailers and finance teams who want quick GST calculations without using manual formulas.

You can use this tool for both GST-exclusive and GST-inclusive calculations. Enter the amount, select the GST rate, choose the supply type, and get the correct GST breakup instantly.

Free Demo Available

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What is GST?

GST, or Goods and Services Tax, is an indirect tax charged on the supply of goods and services in India. It replaced multiple indirect taxes and brought most goods and services under one tax system.

GST is usually added to the taxable value of goods or services. In some cases, the invoice amount may already include GST. A GST calculator helps you calculate the tax amount correctly in both situations. This tool is useful for:

check_circle Business owners
check_circle Accountants and tax professionals
check_circle GST-registered dealers
check_circle Retailers and wholesalers
check_circle Freelancers and consultants
check_circle Finance and billing teams

Enter the Following Details

Taxable value or GST-inclusive amount
GST calculation type (Inclusive or Exclusive)
Applicable GST rate
Supply type (Intra-State or Inter-State)

Basic GST Formula

GST Amount = Taxable Value × GST Rate ÷ 100

Total Invoice Value = Taxable Value + GST Amount

What This GST Calculator Helps You Calculate

Calculation Type

What It Means

Useful For

GST-Exclusive Calculation

GST is added over the base value

Sales bills, quotations and tax invoices

GST-Inclusive Calculation

GST is extracted from a final amount that already includes tax

Price checks, vendor bills and inclusive quotes

Intra-State GST Breakup

GST is split into CGST and SGST or UTGST

Supplies within the same state or applicable Union Territory

Inter-State GST Breakup

Full GST is shown as IGST

Supplies between different states or Union Territories

How to Use This GST Calculator

BUSY's GST Calculator is simple to use whether you are calculating GST on sales, purchases, invoices, quotations or service bills.

1

Enter the Amount

Enter the taxable or GST-inclusive amount to begin the calculation.

2

Select Calculation Type

Select whether the amount is GST-inclusive or GST-exclusive.

3

Choose the GST Rate

Choose the applicable GST rate for your goods or services.

4

Select the Supply Type

Select intra-state or inter-state supply based on the transaction type.

5

View the Results

View the taxable value, GST amount, breakup and invoice total.

GST Calculation Example

Here is a simple example using ₹10,000 as the taxable value and an 18% GST rate.

Calculation

Input

Output

GST-Exclusive

Taxable Value: ₹10,000, GST Rate: 18%

GST: ₹1,800, Total Value: ₹11,800

GST-Inclusive

Inclusive Amount: ₹11,800, GST Rate: 18%

Base Value: ₹10,000, GST: ₹1,800

Intra-State Breakup

Supplier location and place of supply are in the same state

CGST: ₹900, SGST: ₹900

Inter-State Breakup

Supplier location and place of supply are in different states

IGST: ₹1,800

CGST vs SGST vs IGST – What is the Difference?

CGST, SGST, IGST and UTGST are different GST components used based on the supplier location and place of supply.

GST Type

Applies When

Example

CGST

Intra-state supply within a state

Charged with SGST

SGST

Intra-state supply within a state

Charged with CGST

UTGST

Intra-UT supply where UTGST is applicable

Charged with CGST in applicable Union Territories

IGST

Inter-state supply

Supplier location and place of supply are in different states or Union Territories

In practice, if a business in Delhi supplies goods to a place of supply in Delhi, CGST and SGST apply. If a business in Delhi supplies goods to a place of supply in Maharashtra, IGST applies.

Common GST Rates in India

GST rates depend on the type of goods or services, HSN code, SAC code and the latest notifications. The table below gives a simple overview of commonly used GST rates.

0%

Exempt or nil-rated supplies, including selected essential goods and notified services.

5%

Merit-rate goods and services, including many daily-use essentials.

18%

Standard-rate goods and services, including many business and technology services.

40%

Special demerit rate for select luxury and notified goods.

Some special categories may have separate notified rates such as 0.25%, 1.5% or 3%. Businesses should check the correct HSN or SAC code before applying GST on invoices.

GST-Inclusive vs GST-Exclusive Price

GST-inclusive and GST-exclusive prices are often confused, especially while preparing quotations and invoices.

Price Type

Meaning

Example

GST-Exclusive Price

GST is added over the base value

₹10,000 + 18% GST = ₹11,800

GST-Inclusive Price

GST is already included in the final value

₹11,800 includes ₹1,800 GST

Base Value

Price before GST

₹10,000

Final Invoice Value

Price after GST

₹11,800

If you are quoting prices to customers, mention clearly whether the price is inclusive or exclusive of GST.

Benefits of Using a GST Calculator

Manually calculating GST for different rates, supply types and invoice values can be time-consuming and prone to mistakes. BUSY's GST Calculator makes the process easier.

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