Decimal Timing Stopwatch

Decimal timing replaces the standard sexagesimal (60-unit) format with a 100-unit system, converting time into fractions of a minute or hour to simplify high-speed mathematical calculations. 

The Three Common Formats

Professional stopwatches allow you to toggle between these decimal modes:

  • DM (Decimal Minute): 1 minute is divided into 100 parts. (e.g. 1 minute 30 seconds displays as 1.50 minutes).
  • DMP (Decimal Minute/Second): Used for extremely precise industrial minute tracking where 1 minute equals 1,000 parts.
  • DH (Decimal Hour): 1 hour is divided into 100,000 parts. This is the gold standard for time and motion studies to calculate hourly production rates.

Why Use Decimal Timing?

  • Simplified Calculation: It is much easier to multiply or average results. For example, if a task takes 1.25 minutes, calculating the total time for 10 repetitions is a simple multiplication (12.5 minutes), rather than converting and calculating 1 minute and 15 seconds 10 times.
  • Industrial Engineering: Used heavily in lean manufacturing and work measurement to determine standard time for assembly lines.
  • Data Entry: It removes the need for complex formatting when inputting timing data into spreadsheets.

Conversion Example

Standard Time

Decimal Minute (DM)

Decimal Hour (DH)

15 seconds

0.25

0.00416

30 seconds

0.50

0.00833

45 seconds

0.75

0.01250

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Fastime 500DM2
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