Instantly Calculate GST Online (Inclusive & Exclusive)
Free GST Calculator by RealBooks
Just enter the quantity, rate per unit and GST rate, and the calculator automatically shows the GST amount, total amount, and tax breakup.
Use it anytime, completely free.
Free GST Calculator
GST – Goods and Services Tax
GST was introduced to bring uniformity and transparency to the taxation system in India. It replaced several indirect taxes such as VAT, service tax, and excise duty.
Under the GST regime, tax is applied at each stage of the supply chain but is ultimately borne by the final consumer. Businesses can claim input tax credit, which helps reduce the cascading effect of taxes.
With the recent GST 2.0 updates, the tax structure has been simplified into key slabs such as:
0% – Essential goods and exempt supplies
5% – Basic consumption goods and services
18% – Standard rate applicable to most goods and services
40% – Luxury and sin goods
Some categories of goods and services remain exempt from GST.
How to Calculate GST with This Tool?
Using the Free GST Calculator by RealBooks is simple and requires only a few inputs. The tool automatically calculates the GST amount based on the values you enter.
Follow these steps:
Once these details are entered, the calculator automatically displays:
• Total taxable value
• GST amount
• CGST and SGST (for intra-state transactions)
• IGST (for inter-state transactions)
• Final invoice value
This tool is useful for quickly verifying GST values before creating invoices.
Enter Quantity
Enter the total number of units for the product or service in the Quantity field.
Enter Rate per Unit
Enter the price of a single unit of the product or service in the Rate per Unit field.
Select GST Rate
Choose the applicable GST rate based on the GST slab under which the product or service falls.
Select Calculation Type
Choose whether the price you entered is GST Inclusive or GST Exclusive in the Calculation Type field.
Select Tax Type
Choose whether the transaction is Intra-State or Inter-State in the Tax Type field.
Types of GST Active in India
There are four major types of GST currently applicable in India.
CGST – Central Goods and Services Tax
CGST is collected by the central government for intra-state transactions (when goods or services are supplied within the same state). CGST is usually charged along with SGST.
IGST – Integrated Goods and Services Tax
IGST is applied to inter-state supply of goods and services, as well as imports. The central government collects IGST and later distributes the revenue among the respective states.
SGST – State Goods and Services Tax
SGST is collected by the state government for intra-state supply of goods and services. CGST and SGST are generally applied at equal rates.
UTGST – Union Territory Goods and Services Tax
UTGST applies to supply of goods and services in Union Territories. It is charged along with CGST in territories that do not have a state legislature.
Smart, Scalable & Secure Cloud Accounting Software for Every Business
Looking for More Than Just a GST Calculator?
While a GST calculator helps with quick tax calculations, businesses often need a complete solution to manage invoicing, accounting, GST compliance, and financial reporting.
This is where RealBooks Cloud Accounting Software becomes essential.
RealBooks automatically calculates GST during billing, generates GST-compliant invoices, tracks tax liabilities, and helps businesses stay compliant with GST regulations without manual effort.
Take the first step toward smarter accouting today.
FREQUENTLY ASKED QUESTIONS
GST Calculation and GST Accounting
A GST calculator is an online tool that helps you quickly calculate the Goods and Services Tax (GST) on goods and services. By entering the quantity, rate per unit, GST rate, calculation type (inclusive or exclusive), and tax type, the calculator automatically determines the taxable amount, GST value, and the final invoice amount. The Free GST Calculator by RealBooks helps businesses, accountants, and professionals calculate GST instantly without manual calculations.
To calculate GST using an online GST calculator, simply enter the quantity of items, rate per unit, and select the applicable GST rate such as 0%, 5%, 18%, or 40%. Then choose whether the price is GST inclusive or GST exclusive and select the tax type (intra-state or inter-state). The calculator will automatically compute the GST amount, CGST/SGST or IGST breakup, and the final value within seconds.
In a GST inclusive calculation, the price entered already includes the GST amount. The GST calculator separates the tax from the total amount to show the original taxable value and GST portion.
In a GST exclusive calculation, the entered price does not include GST. The calculator automatically adds the GST amount to the base value and shows the final price payable after tax.
The Free GST Calculator supports commonly used GST slabs in India such as 0%, 5%, 18%, and 40%. These GST rates apply to different categories of goods and services under the Indian GST framework. By selecting the correct GST slab, the calculator can accurately compute the tax amount and total invoice value.
Yes. While a GST calculator helps with quick calculations, businesses that create invoices regularly can automate GST calculations using RealBooks Cloud Accounting Software. RealBooks calculates GST during billing, generates GST-compliant invoices, tracks tax liabilities, and helps businesses manage GST accounting and compliance efficiently.
We Also Offer Solutions That Go Beyond Accounting
RealHR
Manage people, payroll, and processes seamlessly with clarity, compliance, and control at every stage.
RealEdge
Expert-led accounting and bookkeeping support that strengthens decisions and scales with your team.
RealFees
Simplify fee tracking, collections, and visibility across students with structured, transparent, and timely billing.