Calculator Inputs
Use one, two, or three work sessions. The calculator supports overnight sessions and separates paid time from nonbillable workload.
Example Data Table
| Date | Gross Hours | Breaks | Nonbillable | Billable Hours | Revenue | Utilization |
|---|---|---|---|---|---|---|
| 2026-03-21 | 8.50 | 0.50 | 1.25 | 5.70 | USD 199.50 | 71.25% |
| 2026-03-22 | 7.75 | 0.50 | 1.00 | 5.06 | USD 177.10 | 69.81% |
| 2026-03-23 | 9.00 | 0.75 | 1.40 | 5.95 | USD 208.25 | 72.12% |
Formula Used
1. Gross Scheduled Time
Gross Scheduled Time = Session 1 + Session 2 + Session 3
2. Paid Tracked Time
Paid Tracked Time = Gross Scheduled Time − Break Minutes
3. Structured Nonbillable Time
Structured Nonbillable = Meetings + Admin + Learning + Miscellaneous Nonbillable
4. Client Ready Time
Client Ready Time = Paid Tracked Time − Structured Nonbillable Time
5. Productive Time
Productive Time = Client Ready Time × Focus Efficiency
6. Raw Billable Time
Raw Billable Time = Productive Time × Billable Utilization
7. Rounded Invoiceable Time
Rounded Billable Time = Raw Billable Time rounded to your selected invoice increment
8. Revenue
Revenue = Rounded Billable Hours × Hourly Rate
9. Actual Utilization
Utilization % = Raw Billable Time ÷ Paid Tracked Time × 100
How to Use This Calculator
- Enter one to three work sessions for the day. Overnight sessions are supported automatically.
- Add break minutes to remove unpaid rest time from your paid tracked hours.
- Enter meetings, admin, learning, and other nonbillable time separately.
- Set your focus efficiency to reflect distractions, interruptions, and task switching.
- Set billable utilization to estimate how much productive time turns into invoiceable work.
- Add your hourly rate, daily billable target, and income target to evaluate performance.
- Choose an invoice rounding rule to match your billing policy.
- Press the calculate button to see results, the performance chart, and export options.
FAQs
1. What does this calculator measure?
It estimates daily scheduled time, paid tracked time, productive time, raw billable time, rounded invoiceable time, utilization, and projected revenue for freelance workdays.
2. Can I use only one session?
Yes. Fill only the first session and leave the others empty. The calculator will still produce complete results from the available data.
3. Why separate breaks from meetings?
Breaks usually remove paid tracked time, while meetings are often paid but nonbillable. Keeping them separate gives a more realistic utilization estimate.
4. What is focus efficiency?
It is a productivity factor that reduces client-ready time based on interruptions, fatigue, context switching, and inconsistent concentration during the day.
5. What is billable utilization?
It represents the share of productive time that becomes billable. Even productive hours may include proposal work, revisions, or internal coordination.
6. Why use invoice rounding?
Many freelancers round time to fixed billing increments. This option shows how invoicing policy changes reported billable hours and revenue.
7. Does the chart compare targets too?
Yes. The Plotly chart includes your daily billable target so you can quickly compare gross time, productive time, and billable output.
8. Can I export the results?
Yes. After calculation, use the CSV button for spreadsheet analysis or the PDF button for reports, client summaries, or internal records.