Time log / cost statement guide
Turn time logs into a checkable cost statement
Keep elapsed seconds, excluded time, hourly rate, and rounding unit/rule on the same row before checking the total.
Separate four conditions
The synthetic formula is billable seconds × hourly rate ÷ 3,600. Keep both raw and excluded seconds before rounding.
| Condition | Value to check | Example |
|---|---|---|
| Elapsed time | Raw seconds | 3,661 seconds |
| Excluded time | Seconds left out | 61 seconds |
| Hourly rate | Amount per hour | ¥2,500 |
| Rounding | Unit and rule | ¥100, nearest |
Follow seconds to amount
Do not round to one hour before applying the rate. First establish billable seconds, calculate the raw amount, then apply the stated unit and rule.
3,661 sec − 61 sec= 3,600 billable sec× ¥2,500 ÷ 3,600= ¥2,5001 sec × ¥100,000 ÷ 3,600= ¥27.77...¥1 unit, round up= ¥28Handoff fields
Pass raw seconds, excluded seconds, billable seconds, rate, rounding condition, and amount on the same row. Do not hand off only the total.
case: excluded-half-hour
raw: 1,801 seconds
excluded: 1 second
billable: 1,800 seconds
rate / rounding: ¥3,000 / ¥100 down
amount: ¥1,500The fixtures are static. They do not fetch or send Stopwatch history or user input.
What this guide does not guarantee
It is not an invoice, tax or currency calculation, contract or accounting advice, legal payment obligation, or proof of a live Stopwatch record. Verify real data in the existing time-cost tool.