Invoice line total calculator

Calculate one invoice line from quantity, unit price, discount and VAT. See the net amount, VAT and estimated total locally in your browser.

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Try a worked example

Calculate one invoice line from quantity, unit price, discount and VAT. See the net amount, VAT and estimated total locally in your browser.

Check the units and options, then use the tool’s calculation button. The example is fictitious; replace its values for your own calculation.

Illustration only. Supply the applicable rates and assumptions yourself; this is not financial, tax or legal advice.

Example input

Quantity for this line: 2
Unit price before VAT: 100
Line discount (%): 10
VAT rate for this line (%): 20
Currency: EUR €

Expected output

Quantity for this line: 2
Unit price before VAT: €100.00
Line subtotal before discount: €200.00
Line discount: 10 %
Net line amount: €180.00
VAT rate: 20 %
VAT: €36.00
Estimated line total: €216.00

Calculates one invoice line: quantity × unit price before VAT, less the line discount, then the VAT rate entered for that line.

Waiting for the tool. The explanation remains available without JavaScript.

Method and limits

The result depends on the values entered and the method shown. Check the assumptions, rates, or rules that apply to your situation before using it. Illustrative result only. Verify the rules and assumptions that apply to your work.

Net line amount = quantity × unit price before VAT × (1 − discount ÷ 100). VAT = net line amount × VAT rate ÷ 100. Estimated line total = net line amount + VAT.

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Quick answer

Calculates one invoice line: quantity × unit price before VAT, less the line discount, then the VAT rate entered for that line.

The page code is downloaded when you open it; values are handled in your browser.

Limits of the result

How the invoice line total is calculated

Net line amount = quantity × unit price before VAT × (1 − discount ÷ 100). VAT = net line amount × VAT rate ÷ 100. Estimated line total = net line amount + VAT.

Enter a quantity greater than zero; fractional quantities such as 2.5 are accepted. The discount is a percentage from 0 to 100, applied before VAT. Enter your applicable VAT rate; the calculator does not choose it. Select EUR, USD or GBP to format the result, not to convert currencies.

Other lines, delivery charges and jurisdiction-specific rounding are not added. The displayed amounts use two decimal places; check the final invoice in your invoicing software. For a net-to-gross or gross-to-net amount without quantity or discount, use the VAT calculator.

Frequently asked questions

What does the calculation include?

This calculator covers one line only with one discount and one VAT rate. It does not add other invoice lines or charges, determine exemptions or tax treatment, or apply jurisdiction-specific rounding. Amounts are displayed to two decimal places; check the invoice software and rules that apply.

Which values should I enter?

Calculate one invoice line from quantity, unit price, discount and VAT. See the net amount, VAT and estimated total locally in your browser. Use consistent amounts, units, and time periods.

Is the result definitive?

No. Check the assumptions and rules that apply to your situation; this is an illustrative calculation, not professional advice.

Sources and references

These references describe the cited context and rules; some apply only in the jurisdiction named in their title. They do not validate this illustrative calculation.