Invoice Hours Calculator

Add multiple time entries with descriptions and a single hourly rate to build an invoice subtotal you can copy into your invoicing tool. The summary list is formatted so you can paste it directly into the body of an invoice as line items.

Use it for invoices that bundle several tasks or sessions for the same client at a single rate, for translating a week of project work into one clean invoice line, or for prepping a draft you will hand off to a bookkeeper. It is also useful when a client asks for a breakdown of hours by task before approving a payment.

Each row stores hours, minutes, and an optional note. The total sums all rows in minutes, converts to decimal hours, and multiplies by your single hourly rate. Adding or removing rows updates the total in real time so you can see the cost of including or excluding a task before you finalize.

The total is the invoice subtotal before tax. The line summary helps you copy a clean breakdown into the body of your invoice. Use the per-line description to remind the client what each block of time covered, and use the total to confirm the subtotal matches what you expect.

One hour of discovery plus four hours 30 minutes of implementation is 5.5 hours. At $75 an hour, that is $412.50. Adding a 45 minute revision call brings the total to 6.25 hours and $468.75. A short engagement with three rows of 1, 2, and 1 hours at $100 totals $400.

Different rates per line item are not supported here. If you bill a discounted rate for revisions, split the work into two invoices or model each rate separately. The total is also pre-tax, so add any sales tax or VAT on top of the subtotal before sending the invoice. Send invoices on a predictable schedule and number them sequentially; clients are far more likely to pay on time when invoices look like part of a real bookkeeping system rather than one-off requests.