About this tool
Invoice Total Calculator is a free, in-browser tool that turns an editable list of line items into a finished invoice total. Add or remove rows, type a description, quantity and unit price for each, then apply a discount, a tax rate and a shipping charge. Nothing is uploaded — every figure is computed on your device as you type, and the result is a clean, copyable summary you can paste into an email or quote.
Each line total is quantity × unit price, and the subtotal is the sum of all line totals. The discount can be a percentage of the subtotal or a fixed amount; the taxable base is subtotal − discount, tax is taxable × rate ÷ 100, and the grand total is taxable + tax + shipping. Shipping is added after tax, matching how most invoices present freight.
Use it to price freelance work, sanity-check a supplier's bill, or draft a quick estimate. Change the discount mode or tax rate and the grand total, subtotal, discount amount and tax amount all update instantly, with a printable block you can copy with one click.