CalQpro

Invoice Calculator

Quick answer: Add line items, tax rate, and discount to calculate full invoice total.

Build an invoice calculation with multiple line items, optional discount (percentage or flat), and sales tax. Instantly see subtotal, discount amount, taxable amount, tax, and total due. Perfect for freelancers, contractors, and small businesses.

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Last reviewed: April 2026Report an error

DescriptionQtyUnit $Total
$300.00
$300.00

Invoice Total

$651.00

Subtotal: $600.00 + $51.00 tax = $651.00.

Subtotal

$600.00

Discount

−$0.00

Tax

$51.00

Total Due

$651.00

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How to Use This Invoice Calculator

  1. 1Add your line items with description, quantity, and unit price.
  2. 2Enter sales tax rate (if applicable).
  3. 3Enter any discount (flat dollar or percentage).
  4. 4Read subtotal, discount, tax, and total amount due.

Frequently Asked Questions

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<p>Powered by <a href="https://calqpro.com">CalQpro</a></p>

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