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VAT calculator

Find net, VAT and gross amounts using an entered rate.

Enter your rate: no country or statutory rate is chosen automatically. One rate applies to one total amount. The starting amount is rounded. From net, VAT is rounded then added; from gross, net is rounded and VAT is the difference. Example: net 100 at 20% → VAT 20, gross 120. No multiple-rate breakdown or per-invoice-line rounding.

Both dots and commas are accepted as decimal separators.

Your inputs stay in your browser.

Method and assumptions

Method version 1.0.0 · Updated

Calculate VAT

Formula: Gross = net × (1 + rate/100); net = gross / (1 + rate/100)

Enter your rate: no country or statutory rate is chosen automatically. One rate applies to one total amount. The starting amount is rounded. From net, VAT is rounded then added; from gross, net is rounded and VAT is the difference. Example: net 100 at 20% → VAT 20, gross 120. No multiple-rate breakdown or per-invoice-line rounding.

amount
Starting amount
direction
The entered amount is
rate
VAT rate (%)
precision
Money decimal places

All amounts use the same currency, without conversion. Choose 0, 2 or 3 decimal places for your needs. Rounded to nearest, ties up.

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript
const beforeTax = 100, rate = 20;
console.log(beforeTax * (1 + rate / 100)); // 120
TypeScript
const beforeTax = 100, rate = 20;
console.log(beforeTax * (1 + rate / 100)); // 120
Python
before_tax, rate = 100, 20
print(before_tax * (1 + rate / 100))  # 120.0
Java
double beforeTax = 100, rate = 20;
System.out.println(beforeTax * (1 + rate / 100)); // 120.0
C#
double beforeTax = 100, rate = 20;
Console.WriteLine(beforeTax * (1 + rate / 100)); // 120