**The standard VAT rate in UK was increased to 20 percent on 4 January 2011.**

*VAT calculator usage:* Simply enter the gross sum, choose vat calculation operation (include or exclude),

tax percentage and press «Calculate» or enter button to calculate VAT amount.

By default the online VAT calculator rate is set for UK VAT calculation.

**How to calculate VAT**

**Excluding VAT from gross sum:**

**VAT calculation formula**for VAT exclusion is the following: to calculate VAT having the gross amount you should__divide__the gross amount by__1 + VAT percentage__(i.e. if it is 15%, then you should divide by 1.15), then__subtract the gross amount__, multiply by__-1__and__round to the closest__value (including eurocents). The last two operations are not mandatory since you see the VAT value even before you do them.**Adding VAT to net amount:**

Easy deal. Simply multiply the net amount by__1 + VAT percentage__(i.e. multiply by 1.15 if VAT is 15%) and you'll get the gross amount. Or multiply by VAT percentage to get the VAT value.**Read**more about VAT tax on Wikipedia.