GST Calculator Online 2025: Simplify Your Tax Calculations

January 29, 2025
gst calculator
Quick Summary

Quick Summary

  • GST full form is Goods and Services Tax.
  • A GST calculator helps quickly compute GST amounts, percentages, final prices, or original costs by entering the original cost and GST rate.
  • GST slabs range from 0% to 28% depending on the product, and the tax is divided into CGST, SGST, and IGST.

Table of Contents


GST stands for Goods and Services Tax and has been in effect in India since July 1, 2017. It has replaced many Indirect Taxes such as VAT, excise duty, etc. It is important to calculate GST accurately so that you can maintain proper financial records for yourself and avoid tax penalties. GST can be calculated easily using our easy GST calculator India.

In this article, we will explore what GST is, how to calculate GST, how to calculate GST percentage, the GST formula, etc. Read through till the end to educate yourself about GST and how it affects your finances. 

What Is GST?

GST stands for Goods and Services Tax. It is a tax system that has eliminated many indirect taxes such as excise duties and VAT etc. It is comprehensive and is applies to all goods and services. However, alcohol for consumption by people and petroleum products are exempted from this tax.

Under the system of GST, all goods and services are divided into tax slabs. They are put into specific slabs based on their nature. The tax rates range from 0% to 28%. There are three main components of GST- CGST, SGST, and IGST

CGST and SGST are charged separately by the Central and State governments respectively on the same goods and services. IGST is charged for the movement of goods interstate or between states. 

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How to Calculate GST?

It is important to know how to calculate GST accurately to avoid any tax penalties and maintain accurate financial reports. Although this can be done easily by using a GST calculator it is important to know the formula as well. The GST calculation formula with the help of GST calculator is as follows:

GST = (Original Cost * GST Rate)/100

Here, the original cost is the cost of the goods and services before adding GST. The GST rate is the rate of GST that applies to specific goods and services based on where they lie in the tax slab.

For a better understanding of this concept, let us take an example.

If the original cost of a product is Rs. 100 and the applicable GST on it is 18%, the GST amount would be=GST = (100*18)/100=18
Therefore, the total cost of the product now after adding GST is Rs. 100 + Rs. 18 = Rs. 118. 

Calculating GST Percentage

To know how to calculate the GST percentage, you need to know the GST amount and the original cost of the product or service. 

GST Percentage = (GST Amount/Original Cost) * 100

Let us look at an example to understand this concept better. 
For example, if the original cost of a product is Rs. 100 and the GST amount is Rs. 18, then the GST percentage would be:

GST percentage = (18/100)*100
= 18%
Therefore, the GST rate applicable here is 18%.

How to Calculate For GST Addition

To calculate the final amount chargeable without using a GST calculator, you can use the following GST formula:

Final price = Original Cost + GST amount
Here, the original cost is the cost of the product or service before adding GST to it. The GST amount is the amount of GST chargeable on a product or service.

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Let us understand it better by using an example. To calculate the GST amount, you can use the following formula:

GST = (Original cost * GST rate)/100
If the original cost is Rs. 1000 and the GST rate is 18%, then the GST amount will be: (1000*18)/100
= Rs. 180
Final price = Original cost + GST amount
= Rs. 1000+180
= Rs. 1180. 
Therefore, the final price calculated by using the GST formula is Rs. 1180.

How to Calculate For GST Removal 

To calculate the price of a product or a service before GST was added to it without using a GST calculator, you can use the following GST formula:

Original Cost = Final price / (1 + GST rate/100)

Here, the final price is the cost of an object or service after GST has been added to it. The GST rate is the GST percentage applicable to goods and services based on what they are and where they lie on the tax slab. 
Let us look at an example to understand this concept better. 

For example, if the final price is Rs. 1200 and the applicable GST rate is 20%, then the original cost of a product before GST was added to it would be: 

Original cost = 1200/(1+20/100)
= Rs. 1000

Therefore, the original cost of the product or service before GST was added to it was Rs. 1000. So, you can see now that it is quite simple to calculate GST using the GST formula. However, these things can also be calculated using a GST calculator. 

FormulaExample
Calculation of GST AmountGST = (Original Cost * GST rate)/100Original cost = Rs.100, GST rate = 18%
GST = (100*18)/100 = Rs.18
Calculation of GST PercentageGST percentage = (GST amount / Original cost)*100Original cost = Rs.100, GST rate = Rs.18
GST percentage = (18/100)* 100 = 18%
Calculation for GST AdditionFinal price = Original Cost + GST amountOriginal cost = Rs.1000, GST amount = Rs. 180
Final price = 1000 + 180 = Rs.1180
Calculation for GST RemovalOriginal Cost = Final price (1 + GST rate/100)If the final price = Rs.1200, GST rate = 20%
Original cost = 1200 / (1 + 20/100) = Rs. 1000

Percentage of GST in India & Tax Components under GST

GST SlabGST Rate(%)Description
0%0Essential goods such as food grains, books.
5%5Items of mass consumption, transport
12%12Essential goods such as food grains, and books.
18%18Consumer durables, ACs, refrigerators
28%28Luxury goods, automobiles, tobacco products
Special RatesVariesCertain goods like gold, rough diamonds

Tax components under GST

Under the GST regime, there are three main tax components:

  1. Central Goods and Services Tax (CGST): Tax levied by the central government on the intra-state supply of goods and services. The revenue collected under CGST goes to the central government.
  2. State Goods and Service Tax (SGST): It is levied by the state government on the supply of goods and services in the state. The revenue collected under SGST goes to the state government.
  3. Integrated Goods and Services Tax (IGST): It is levied by the central government on the supply of goods and services. In the case of inter-state transactions, IGST replaces both CGST and SGST. The revenue collected under IGST is shared between the central and state governments.

How to Use GST Calculator? 

A GST calculator is a useful tool that can help you calculate the GST amount or the final price of a product or service, which includes the GST. It helps you to calculate these entities accurately and swiftly. This saves you any scope of error and a lot of time. 

You can follow these steps to use a GST calculator:

  1. Know the original cost of the product or the service. 
  2. Find out the applicable GST rate for this product or service. GST rates are different for different products and services based on the type of product it is. This determines where it lies on the tax slab and how much the GST rate for it will be. 
  3. Depending on which calculator you are using, you can now click on the option that reads, “GST Amount” or “Final Price Including GST”. 
  4. Enter the original cost of the product or service you are calculating the GST for. 
  5. Enter the GST rate that applies to the said product or service. 
  6. If you had selected the option titled “GST Amount”, the calculator will now display the amount of GST that is to be charged on the original amount. If you select the option titled “Final Price Including GST”, the GST calculator will display the final price with the GST already added to it. 
  7. Always recheck the result to make sure it is correct. 

Benefits of Using GST Calculator

  • Accurate Tax Calculation: Ensures precise computation of GST on goods and services, minimizing errors.
  • Time-Saving: Quickly calculates GST without manual effort, making it a fast and efficient tool.
  • Simplifies Complex Calculations: Handles multiple GST rates (5%, 12%, 18%, 28%) easily, simplifying complex tax structures.
  • Business Planning: Helps businesses project GST costs, aiding in price-setting and financial planning.
  • Transparency: Provides clear visibility on tax liabilities, helping businesses stay compliant with GST laws.
  • User-Friendly: Easy to use for individuals and businesses, regardless of financial expertise.
  • Reduces Risk of Penalties: Ensures correct tax amounts, reducing the risk of underpayment or overpayment and avoiding penalties.

Conclusion

In this article, we discussed in detail about GST. You get to know what it is, how to calculate GST, what is GST formula, and much more. You also discovered what a GST calculator is and how exactly it can be used. We elaborated on the steps you need to take to operate a GST calculator as well.

It is important to know all that you can about GST since it has a direct effect on our finances. You should know how to calculate it accurately to maintain personal financial records, and to make sure that you do not end up having any tax penalties.

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Frequently Asked Questions (FAQ’s)

How do you calculate 18% GST?

To calculate 18% GST, multiply the price of the product or service by 0.18 (which represents 18%). For example, if an item costs ₹100, the GST will be ₹100 × 0.18 = ₹18. So, the total price including GST will be ₹100 + ₹18 = ₹118.

How do you calculate GST formula?

The GST formula is:
GST = (Price × GST Rate) / 100.
To calculate the total price, you add the GST to the original price:
Total Price = Price + GST.
For example, for a ₹200 item with 18% GST:
GST = (200 × 18) / 100 = ₹36, Total Price = ₹200 + ₹36 = ₹236.

How do you calculate GST on a total?

To calculate GST on a total, first determine the GST rate, then use the formula:
GST = Total Price × (GST Rate / (100 + GST Rate)).
For example, for a total price of ₹118 with an 18% GST rate,
GST = 118 × (18 / 118) = ₹18.
This helps you find the GST portion of the total price.

How do I remove 18% GST from my total amount?

To remove 18% GST from your total amount, divide the total price by 1.18 (since 18% GST is included). For example, if the total price is ₹118,
Price excluding GST = ₹118 ÷ 1.18 = ₹100.
This gives you the original price before GST was added.

How much GST on 5000?

To calculate the 18% GST on ₹5000, use the formula:
GST = Price × (GST Rate / 100).
So, GST = ₹5000 × (18 / 100) = ₹900.
Therefore, the GST on ₹5000 is ₹900. The total price including GST would be ₹5000 + ₹900 = ₹5900.

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