以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Choose whether to add VAT to a net amount or extract VAT from a gross amount.
- Enter the amount.
- Enter the VAT rate that applies to the goods or service in your country. Many countries have standard and reduced rates.
計算式
VAT is a percentage of the net price. To remove VAT from a gross price, divide by (1 + rate).
Gross = net × (1 + rate)
Net = gross / (1 + rate)
VAT = gross − net
Example at 20%
- Add: £100 net → VAT £20 → gross £120.
- Remove: £120 gross → net 120 / 1.2 = £100 → VAT £20.
- Note: VAT in a gross price is 1/6 of the total at 20%, not 20%.
よくある質問
What VAT rate should I use?
Rates vary by country and product. For example, the UK standard rate is 20% and Germany's is 19%, with reduced rates for some goods. Check your tax authority for the correct rate.
Is GST the same as VAT?
Goods and services tax (used in Canada, Australia, India and elsewhere) works the same way for this calculation.
Why can't I just subtract 20% to remove VAT?
Because VAT was added on the smaller net amount. Subtracting 20% of the gross price removes too much.