A VAT calculator is a simple tool used to calculate the Value Added Tax (VAT) amount on a given product or service. To use it, you typically input the item's price or value, and the calculator then computes the VAT based on the applicable VAT rate. In the UK, for example, the standard VAT rate was 20%, so if you entered a product's price of £100, the calculator would display the VAT amount of £20. VAT calculators are handy for both businesses and consumers to quickly determine how much VAT is included in a purchase or sale, aiding in financial planning and compliance with tax regulations. However, it's important to note that VAT rates may vary by country and can change, so it's crucial to use an accurate and up-to-date calculator for precise calculations.