GST Calculator
Calculate Goods and Services Tax (GST / VAT) amounts with inclusive and exclusive tax modes and rate presets.
Net Price: $1000.00 + GST Tax: $180.00
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About the GST Calculator
Goods and Services Tax (GST) and Value Added Tax (VAT) are consumption taxes applied to goods and services. Calculating net amounts, tax components (CGST/SGST/IGST), and gross totals is critical for businesses and shoppers alike.
How to Use the GST Calculator
- 1Enter the Base or Total Amount.
- 2Choose whether the amount is GST Exclusive (add tax) or GST Inclusive (remove tax).
- 3Select a standard tax slab (5%, 12%, 18%, 28%) or enter a custom rate.
- 4View the Net Amount, GST Tax Value, and Gross Total.
How It Works & Underlying Logic
For GST Exclusive: Tax = Amount × (Rate / 100). For GST Inclusive (Reverse GST): Base Amount = Total / (1 + Rate / 100), and Tax = Total - Base Amount.
GST Add: Total = Base + (Base × Rate / 100) | GST Remove: Base = Total / (1 + Rate / 100)Practical Calculation Examples
Add 18% GST to $1,000 Service
Tax Exclusive calculation
Reverse GST from $590 Item
Tax Inclusive calculation with 18% GST
Helpful Tips & Best Practices
- •For intra-state transactions in dual GST regimes (like India), GST is split equally between CGST (Central GST) and SGST (State GST).
- •Always check invoice types to confirm whether quoted prices already include sales tax.
GST Calculator FAQ
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