Invoice Total Calculator
Enter your invoice line items, then add a discount, tax rate and shipping to see the subtotal, discount, taxed base, tax amount and grand total clearly.
How to calculate an invoice total
- Add each line item with its quantity and unit price.
- Enter a discount percent, tax percent and shipping if any.
- Read the subtotal, tax and grand total.
Examples
Two products, 10% off, 8% tax, $5 shipping
2 x $50 and 1 x $30, discount 10%, tax 8%, shipping $5
subtotal $130, tax $9.36, total $131.36
Frequently asked questions
In what order are discount and tax applied?
The discount comes off the subtotal first, then tax is charged on the discounted base, and shipping is added last.
Is shipping taxed?
No. In this calculator shipping is added after tax, so the tax is only charged on the discounted goods.
How is rounding handled?
Every amount is rounded to two decimal places, and the parts add up exactly to the grand total shown.
Can I leave the discount or tax blank?
Yes. Any of discount, tax and shipping can be left at zero, and the total adjusts accordingly.
Does it support multiple line items?
Yes. Add as many quantity and price rows as you need and the subtotal sums them all.
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