🧾 Invoice Calculator

Calculate line items, subtotal, tax, discount, and total invoice amount.

Item Description

Quantity

Rate ($)

Amount ($)

Tax Rate (%)

Discount (%)

Invoice Summary

Subtotal

$0.00

Discount Amount

$0.00

Tax Amount

$0.00

Grand Total
$0.00

Formula

Subtotal = Sum(Quantity × Rate) | Discount = Subtotal × (Discount % / 100) | Tax = (Subtotal - Discount) × (Tax % / 100) | Grand Total = Subtotal - Discount + Tax

Frequently Asked Questions

How is tax calculated on an invoice?

Tax is usually calculated on the subtotal after applying any item or order discounts.

Can I add multiple items?

Yes, click the 'Add Line Item' button to add as many products or services as needed.