GST & Tax Calculator GST & Tax Calculator Calculate inclusive and exclusive taxes instantly. Initial Amount Tax Percentage (%) / Sales Tax / VAT 5% (Common US State Tax) 8.25% (US Standard) 10% (Australia GST / Global) 18% (India GST) 20% (UK / Europe VAT) Enter Custom Rate... + Add Tax (Exclusive) - Remove Tax (Inclusive) Net Amount: 0.00 Tax Amount: 0.00 Total (Gross): 0.00