GST & VAT Calculator

User Guide: How to Operate

Global GST/VAT Master is designed for freelancers, business owners, and consumers to calculate precise tax liabilities with full commercial controls.

• Step 1: Select Jurisdiction
  Choose your country from the dropdown. The tool automatically loads standard VAT/GST rates. Select India to enable automatic CGST + SGST split display.
• Step 2: Enter Qty & Discount
  Enter the unit price, then set a Quantity for bulk pricing. Apply a Discount as a percentage (%) or a fixed flat amount before tax is calculated.
• Step 3: Choose Tax Mode
  Use the toggle switch. Select Exclusive to add tax on top of a price, or Inclusive to extract tax from a gross total (Reverse GST).
• Step 4: Generate Invoice
  After calculation, click "Generate Invoice" to create a professional PDF receipt with a full breakdown and the total amount expressed in words.

Technical Algorithm: How It Works

Understanding the math behind the tool ensures financial accuracy for every calculation mode.

1. Line Total with Quantity

Line Total = Unit Price × Quantity

2. Discount Application

After Discount = Line Total − Discount Amount

3. Exclusive Tax (Adding Tax on Top)

Tax = After Discount × (Rate / 100)  |  Gross = After Discount + Tax

4. Inclusive Tax (Reverse GST Extraction)

Net = Gross ÷ (1 + Rate / 100)  |  Tax = Gross − Net

5. India CGST / SGST Split

CGST = Tax / 2  |  SGST = Tax / 2

Privacy & Data Security

This financial tool operates 100% Client-Side. Your transaction amounts, calculation history, and generated invoices are processed locally within your browser's memory.

No data is ever sent to our servers. Calculation history is stored only in your own browser's localStorage and can be cleared at any time.