Work Hours in a Period
Calculate total work hours and work days in a week, month, quarter or year.
Results
How many work hours are in a month? How about a quarter or a full year? This calculator gives you the total based on your actual schedule. Project managers use this for capacity planning, contractors for billing estimates and HR teams for leave accrual calculations. Customize hours per day and days per week to match any work schedule.
Explore all our work hours calculator tools, or browse the full time and date converters & calculators.
Frequently asked questions
A standard month has approximately 173.3 work hours (40 hours/week × 52 weeks ÷ 12 months). The exact count varies by month - February has fewer workdays than March. Use 160 hours as a quick estimate for a 4-week month.
A standard full-time year has 2,080 work hours (40 hours × 52 weeks). Subtracting typical US PTO (10 days holiday + 15 days vacation) brings it to about 1,880 net working hours.
A quarter has about 65 work days (13 weeks × 5 days). Q1 often has fewer due to New Year's, while Q3 tends to have the most consecutive work days.
Change the hours per day and days per week to match your schedule. A 3-day, 6-hour schedule gives 18 hours per week and about 936 hours per year.
Multiply your team size by work hours in the period, then apply a utilization rate (typically 70-80% for consulting). A 5-person team over a quarter: 5 × 520 × 0.75 = 1,950 billable hours.