GST Calculator

Calculate GST amounts, add or remove tax from prices, and find net amounts instantly at any tax rate.

Introduction

Need to figure out GST on a price? This calculator adds GST to base prices or removes it from final amounts, depending on what you need. Useful for preparing invoices, checking bills, setting product prices, or just understanding how much tax is buried in a total. Pick your GST rate (5%, 12%, 18%, 28%, or any custom percentage), type the amount, and get an instant breakdown showing the base price, GST amount, and total. Works for Indian GST or any similar tax system in other countries. Everything calculates in your browser, so pricing info and business figures stay private on your device. Whether you're a business owner preparing invoices, an accountant verifying tax calculations, or someone shopping who wants to understand the tax component in prices, this tool helps you work with GST quickly and accurately. The calculator handles both forward calculations (adding GST to a base amount) and reverse calculations (extracting GST from a total), making it versatile for various business scenarios from invoice generation to price verification and financial planning.

Who Should Use This Tool?

Business owners creating GST-compliant invoices
Accountants verifying tax calculations on bills
E-commerce sellers pricing products with tax
Retailers preparing customer quotations
Freelancers billing clients with GST
Shoppers understanding tax in product prices
Tax consultants checking client invoices
Finance teams reconciling GST accounts
Startup founders setting product pricing
Procurement managers verifying vendor bills

How This Tool Works

The GST Calculator uses standard tax calculation formulas to add or remove Goods and Services Tax from amounts. When adding GST, it multiplies your base amount by the tax rate to get the GST value, then adds this to the base to show your total. When removing GST, it works backwards from the total using the formula: Base Amount = Total / (1 + GST Rate/100), then subtracts to show the GST component. The calculator handles all common GST rates in India (5%, 12%, 18%, 28%) as well as custom rates including decimals, making it useful for any tax percentage. Results update instantly as you type, showing three key figures: the original/base amount, the GST amount itself, and the final total including tax. All calculations happen in your browser using JavaScript, so your financial information never leaves your device. The tool maintains precision to two decimal places for accurate currency amounts and follows standard rounding rules used in accounting. You can switch between Add GST and Remove GST modes depending on whether you're starting with a pre-tax price or a tax-inclusive total, making the calculator flexible for different business scenarios from invoice preparation to bill verification and pricing strategy decisions.

Try GST Calculator Now

Use the interactive tool below to get instant results

Privacy First

All calculations happen in your browser. No data is sent to any server.

Calculation Mode

Base Amount

Amount (₹)

Enter the base price before GST

GST Rate (%)

Select common rate or enter custom GST percentage

Example Calculations

GST Exclusive (Adding GST):

Base Amount: ₹1,000

GST Rate: 18%

GST Amount: ₹180

Total: ₹1,180

GST Inclusive (Extracting GST):

Total Amount: ₹1,180

GST Rate: 18%

Base Amount: ₹1,000

GST Amount: ₹180

Common GST Rates in India

0%: Essential items (bread, milk, eggs, vegetables)

5%: Common necessities (sugar, tea, coffee, edible oils)

12%: Standard goods (computers, processed foods)

18%: Most services and manufactured goods

28%: Luxury items (cars, AC, refrigerators)

Custom: Special rates for specific items

How to Use Gst Calculator

Select Calculation Type

Pick whether you want to add GST to a price (starting with the pre-tax amount) or remove GST from a total (starting with the tax-inclusive price). Each mode handles different scenarios you run into—like preparing an invoice versus checking a bill.

Enter the Amount

Type the price or total depending on what you picked. Adding GST? Enter the base price before tax. Removing GST? Enter the final price including tax. Works with whole numbers or decimals, so calculate tax on anything from small items to big business transactions.

Set GST Rate

Enter the GST rate as a percentage. Common rates in India are 5%, 12%, 18%, and 28% depending on what you are selling. You can also type custom rates like 0.25% or 3% if needed. Works with any percentage, so it handles different countries with their own tax rates.

View Complete Breakdown

Results show up immediately with the GST amount, original price (before tax), and final price (after tax) all labeled clearly. Breakdown helps you see exactly how much is tax and how much is the actual cost—handy for verifying invoices or preparing quotes for customers.

Use Cases for Gst Calculator

Invoice Preparation

Calculate GST when creating customer invoices. Enter product prices, apply the right GST rate for each item, and get accurate tax amounts and totals. Makes sure your invoices follow tax rules and clearly show base price, GST, and what the customer owes.

Price Verification

Check bills and receipts by working backwards from the total to see if GST is correct. Verify vendors charged the right rate and amount. Catch mistakes in tax calculations on purchase invoices so you do not overpay or mess up expense tracking.

Product Pricing Strategy

Figure out final selling prices when launching products or changing rates. Calculate how much GST adds to your cost, helping you set competitive prices while keeping profit margins intact. Compare pricing across different GST slabs when deciding how to categorize products.

Accounting Reconciliation

Break total sales or purchase amounts into GST and net components for accounting entries. Calculate monthly or quarterly GST liability from sales figures. Prepare tax returns by correctly separating tax collected from actual revenue earned during the period.

Import-Export Calculations

Calculate IGST on interstate transactions or imported goods. Figure out landed costs including customs duties and GST. Plan international business by understanding total tax impact on cross-border trade and the complete cost structure with all taxes.

Key Features

Add or Remove GST

Switch between adding GST to a base price or removing it from an inclusive price. Both modes in one tool.

Any Tax Rate

Works with standard rates (5%, 12%, 18%, 28%) or custom rates. Handles any percentage including decimals.

Instant Breakdown

See base amount, GST amount, and total separated clearly. No confusion about which number is which.

Decimal Precision

Handles decimals and rounds results to two decimal places for proper currency. Maintains accuracy for accounting records.

No Registration Required

Start calculating immediately. No accounts, no sign-ups, no personal info needed.

Complete Privacy

Calculations happen in your browser. Business figures and pricing info never leave your device.

Frequently Asked Questions

How do I calculate GST on a product price?

Pick Add GST mode, type your pre-tax price, and enter the GST rate (like 18%). The calculator shows the GST amount and final price including tax. For example, on ₹1000 with 18% GST, tax is ₹180 and total is ₹1180.

How do I find the original price from a GST-inclusive amount?

Use Remove GST mode when you have the final price and need the pre-tax amount. Enter the total and GST rate. The calculator pulls out the GST component and shows the original price. For a ₹1180 receipt with 18% GST, base price is ₹1000 and GST is ₹180.

What GST rates should I use for different products?

India has multiple GST slabs: 0% (essentials), 5% (common items), 12% (processed foods), 18% (most goods and services), 28% (luxury items). Check your product HSN code for the exact rate. This calculator works with whatever rate you enter, so just type the percentage for your specific item.

Are my business figures and prices stored anywhere?

Nope. All calculations happen in your browser using JavaScript. Amounts, tax rates, and business info you type never get sent to any server, stored in any database, or tracked. Your pricing strategies and financial data stay completely private on your device.

Can I use this for tax systems other than Indian GST?

Yes. While designed for GST in India, this works for any Value Added Tax (VAT), Sales Tax, or similar consumption tax anywhere. Just enter your local tax rate percentage. The math is the same—adding or removing tax from prices—no matter what the tax is called in your country.