Calculateur de Billable Hours
Calculate billable hours after non-billable time and utilization percentage.
Formula and method
This calculator computes Billable hours, Billable revenue, Utilization directly in your browser without sending data to an external server.
Mathematical formula
- Billable hours:
Math.max(total-nonbillable,0) - Billable revenue:
Math.max(total-nonbillable,0) × rate - Utilization:
Math.max(total-nonbillable,0) ÷ total × 100
Variables and parameters
- Total hours (total): default value 40 hours.
- Non-billable hours (nonbillable): default value 8 hours.
- Hourly rate (rate): default value 85 $/hour.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does Billable Hours Calculator use?
Billable Hours Calculator evaluates outputs such as <strong>Billable hours, Billable revenue, Utilization</strong> based on inputs including Total hours, Non-billable hours, Hourly rate. Check the Mathematical Method section for the explicit formula.
What happens if I enter invalid or zero values into Billable Hours Calculator?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in Billable Hours Calculator saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is Billable Hours Calculator free to use?
Yes. Billable Hours Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Billable Hours Calculator store or upload my data?
No. Billable Hours Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Billable Hours Calculator?
Billable Hours Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Billable Hours Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Billable Hours Calculator to your own blog post or page.