Billable Focus Timer
Billable Focus Timer
Switch between client timers without double-billing, then copy a clean invoice-ready time summary.
Use the instrument above, then check the calculation record, assumptions and related tools below.
Calculator output
Billable Focus Timer
Client chess clock
Activate one client at a time. Starting a new client pauses the previous one, so two clients cannot bill at once.
Live day wheel
| Client | Time | Due |
|---|---|---|
| Client A | 00:00:00 | $0.00 |
| Client B | 00:00:00 | $0.00 |
| Client C | 00:00:00 | $0.00 |
Live math canvas
Your numbers, formula and explanation together
3-client chess clock: Only one client runs at a time. The day wheel turns tracked seconds into time share and billable dollars.
Formula applied
The exact method behind this answer
CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.
Earned amount = tracked seconds ÷ 3600 × hourly rate. Gross due is the sum of every client amount. Day-wheel share = client tracked seconds ÷ total tracked seconds.- Apply the methodEarned amount = tracked seconds ÷ 3600 × hourly rate. Gross due is the sum of every client amount. Day-wheel share = client tracked seconds ÷ total tracked seconds.3-client chess clockOnly one client runs at a time. The day wheel turns tracked seconds into time share and billable dollars.
Your live breakdown
Current calculator context
This page keeps the active calculator, default worked example and method beside the tool so the answer is not separated from its arithmetic.
- Tool
- Billable Focus Timer
- Current result
- 3-client chess clock
- Detail
- Only one client runs at a time. The day wheel turns tracked seconds into time share and billable dollars.
- Formula
- Earned amount = tracked seconds ÷ 3600 × hourly rate. Gross due is the sum of every client amount. Day-wheel share = client tracked seconds ÷ total tracked seconds.
Resulting answer
3-client chess clock
Only one client runs at a time. The day wheel turns tracked seconds into time share and billable dollars.
- Tool
- Billable Focus Timer
- Current result
- 3-client chess clock
- Detail
- Only one client runs at a time. The day wheel turns tracked seconds into time share and billable dollars.
- Formula
- Earned amount = tracked seconds ÷ 3600 × hourly rate. Gross due is the sum of every client amount. Day-wheel share = client tracked seconds ÷ total tracked seconds.
Assumptions used
What this answer assumes
These boundaries keep the calculation honest and make clear when a specialist rule set is needed.
- Time is tracked locally in the browser while the page is open.
- Rates are hourly and treated as simple billable rates before tax.
- Copy output is a work note, not an accounting system.
- Only one client can be active at once.
Master’s Tip
How to use the result well
Like a chess clock, activating one side stops the other. Here, activating one client pauses the previous active client.
Printable record
What belongs in the saved calculation
If Client A runs for 10 minutes at $90/hour, the earned amount is 600 ÷ 3600 × 90 = $15.00.
- Tool
- Billable Focus Timer
- Current result
- 3-client chess clock
- Detail
- Only one client runs at a time. The day wheel turns tracked seconds into time share and billable dollars.
- Formula
- Earned amount = tracked seconds ÷ 3600 × hourly rate. Gross due is the sum of every client amount. Day-wheel share = client tracked seconds ÷ total tracked seconds.
Method used
Earned amount = tracked seconds ÷ 3600 × hourly rate. Gross due is the sum of every client amount. Day-wheel share = client tracked seconds ÷ total tracked seconds.
The point is visible working: the page shows how time becomes a count, cost, split, progress value or pattern rather than hiding the arithmetic.Assumptions
- Time is tracked locally in the browser while the page is open.
- Rates are hourly and treated as simple billable rates before tax.
- Copy output is a work note, not an accounting system.
- Only one client can be active at once.
Questions
Why is this called a chess clock?
Like a chess clock, activating one side stops the other. Here, activating one client pauses the previous active client.
Does it save my work?
This first web version tracks in the open page. Copy or print the report before closing.
Can two clients run at once?
No. That is the point: it prevents accidental double-billing.