1 hour and 40 minutes equals 1.67 in decimal format. Calculated by dividing 40 by 60 (= 0.67) and adding it to 1.
Adjust the values below to convert any time to decimal format.
Converting 1 hour and 40 minutes to decimal is a simple three-step process:
Formula: Hours + (Minutes ÷ 60) = 1 + (40 ÷ 60) = 1.67
1 hour and 40 minutes (1.67 decimal hours) is exactly 100 minutes — an easy benchmark to remember. This duration is typical for feature films, double class periods in schools, or a standard appointment plus 40-minute follow-up.
Writing 1.40 instead of 1.67 is a $8.10 error per entry at $30/hour. Since 40 minutes = two-thirds of an hour (40 ÷ 60 = 0.6667), the decimal rounds to 1.67. A helpful trick: 100 minutes ÷ 60 = 1.6667, which is easy to verify mentally.
Film production crews commonly log 100-minute blocks for call time. In education, block scheduling often uses 100-minute periods. For Uber/Lyft drivers tracking ride time for tax deductions, 1.67 hours is a frequent entry for airport runs.
1 hour and 40 minutes equals 1.67 decimal hours. You calculate this by dividing 40 by 60 (= 0.67) and adding it to 1.
No! A common mistake is writing 1.40. The correct decimal is 1.67. You must divide minutes by 60, not just append them.
Simply enter 1.67 in the hours column of your timesheet or payroll software. This represents 1 hour and 40 minutes of work.
Assuming an 8-hour workday: 1.67 ÷ 8 = 0.2088, or about 20.9% of a full workday.
