Time Duration Calculator

Time Duration is evaluated from Start Time, End Time and Break. The calculation reports Hours, Minutes and Seconds.

Results

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About the Time Duration Calculator

Time Duration is treated here as a quantitative relation between Start Time, End Time and Break and Hours, Minutes, Seconds and Total Minutes.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
2. Gross duration = (end_minutes - start_minutes + 1440) mod 1440 (handles overnight shifts)
3. Net duration = Gross - break minutes
4. Hours = floor(net minutes / 60)
5. Remaining minutes = net minutes mod 60
6. Decimal hours = net minutes / 60 (rounded to 2 decimal places)

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

2. Gross duration = (end_minutes - start_minutes + 1440) mod 1440 (handles overnight shifts)
3. Net duration = Gross - break minutes
4. Hours = floor(net minutes / 60)
5. Remaining minutes = net minutes mod 60
6. Decimal hours = net minutes / 60 (rounded to 2 decimal places)

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Standard workday: 9:00 AM to 5:30 PM, 30-min break

Inputs

start_time: 9:00 AM end_time: 5:30 PM break_min: 30
Hours: 8 hrs. Minutes: 30 min. Seconds: 0 sec. Total Minutes: 510 min. Decimal Hours: 8.5 hrs. Net Hours: 8 hrs

With Start Time = 9:00 AM, End Time = 5:30 PM and Break = 30 as the stated inputs, the result is Hours = 8 hrs, Minutes = 30 min and Seconds = 0 sec. Each value corresponds to the declared output fields.

Example 2: Overnight shift: 11:00 PM to 7:30 AM

Inputs

start_time: 11:00 PM end_time: 7:30 AM break_min: 30
Hours: 8 hrs. Minutes: 30 min. Seconds: 0 sec. Total Minutes: 510 min. Decimal Hours: 8.5 hrs. Net Hours: 8 hrs

With Start Time = 11:00 PM, End Time = 7:30 AM and Break = 30 as the stated inputs, the result is Hours = 8 hrs, Minutes = 30 min and Seconds = 0 sec. Each value corresponds to the declared output fields.

Example 3: Consulting billing: 10:15 AM to 3:45 PM, no break

Inputs

start_time: 10:15 AM end_time: 3:45 PM break_min: 0
Hours: 5 hrs. Minutes: 30 min. Seconds: 0 sec. Total Minutes: 330 min. Decimal Hours: 5.5 hrs. Net Hours: 5.5 hrs

With Start Time = 10:15 AM, End Time = 3:45 PM and Break = 0 as the stated inputs, the result is Hours = 5 hrs, Minutes = 30 min and Seconds = 0 sec. Each value corresponds to the declared output fields.

Example 4: Part-time: 6:00 AM to 11:30 AM, no break

Inputs

start_time: 6:00 AM end_time: 11:30 AM break_min: 0
Hours: 5 hrs. Minutes: 30 min. Seconds: 0 sec. Total Minutes: 330 min. Decimal Hours: 5.5 hrs. Net Hours: 5.5 hrs

With Start Time = 6:00 AM, End Time = 11:30 AM and Break = 0 as the stated inputs, the result is Hours = 5 hrs, Minutes = 30 min and Seconds = 0 sec. Each value corresponds to the declared output fields.

Common Use Cases

  • Calculate hours worked between clock-in and clock-out times
  • Find duration of a flight or road trip
  • Determine elapsed time for billing/invoicing