Business finance administration

Free Billable Hours Calculator.

Billable total and invoice-ready activity breakdown.

Calculate billable time from the recorded intervals and agreed rules so the resulting charge remains easy to check.

Chrome extension + account required.
25 free automation tasks/month across tools. Browser-provider limits apply.

WHAT TO HAVE READY

Time entries and billing rules.

YOUR STARTING POINT

A task you can make yours.

Copy it here. Paste it into WebAct when you are ready.

This page prepares your prompt. The task runs in WebAct.

01

Make the task yours.

Review the prompt above. Add your goal and any requirements that matter.

02

Bring it to WebAct.

Open WebAct, paste the task and provide the data and rules. Review any proposed calculation or code action before approving it, then check a known example.

03

Check the useful part.

Check formulas, code and calculations against known inputs in the appropriate runtime. Review actions before execution and keep the original data available.

A PRACTICAL GUIDE

How to use the Billable Hours Calculator.

Billable hours should follow the client's rounding and break rules. Keep actual duration visible alongside billed duration so a rounding policy does not hide how the total was calculated.

Make the workflow fit your task.

Record start and end times, breaks, timezone if needed, and the agreed billing increment. Calculate actual duration first, then apply the billing rule separately and multiply by the rate. Flag missing times or overlaps before producing a charge.

What you provide
Time entries and billing rules.
What you get
Billable total and invoice-ready activity breakdown.

See the input and the result.

Illustrative input and output · a teaching example, not a live WebAct run

Example input

Work from 09:00 to 12:00 with a 30-minute unpaid break; rate USD 60/hour; bill exact time.

Completed example

Elapsed time: 3 hours.
Billable time: 2.5 hours.
Fee: 2.5 × USD 60 = USD 150, before any supplied taxes or expenses.
Download this example

Load this input into the prompt, then copy it to WebAct to try the task. Your result may differ from the illustration.

Decisions and troubleshooting.

Should every short task be rounded independently to the billing increment?

Follow the client agreement. Rounding each entry versus a daily total can produce different billed time.

Why does the billed amount exceed elapsed working time times the rate?

Rounding, minimum charges or excluded breaks may explain it. Show actual and billed durations separately.

Try it with your own source.

Replace the example with your material in the task prompt. Keep the requirements you need, then copy the task into WebAct.

Customize and copy the task ↑
BEFORE YOU BEGIN

Using WebAct.

The prompt and example are available here. Run your task in the WebAct Chrome extension.

Is this tool free?

You can copy and edit the prompt here for free. To use it with WebAct, install the Chrome extension, create and verify your account, and connect an available browser ChatGPT session. The Free plan includes 25 user-started automation tasks per calendar month, shared across tools. Ordinary browser Chat is separate; provider limits apply.

Learn about shared context in our privacy policy and choosing Chat or Task.

FROM A PROMPT TO YOUR OWN WORK

Bring the task to your page.

Install WebAct, add your source material and make the result yours.

Install WebAct