Man-Hours Calculator Total labor hours. Number of workers Hours worked each s min hr d Days Total man-hours s min hr d 1,600 Step-by-step with your numbers: 1. Values used: 2. Number of workers = 10 3. Hours worked each = 8 4. Days = 20 5. Total man-hours = Number of workers x Hours worked each x Days = 10 x 8 x 20 = 1,600 Did we solve your problem today? 👍 Yes 👎 No Thanks for the feedback! Total labor hours for a project or period. FAQ Multiply by rate? Man-hours × hourly rate = labor cost. Related calculators FTE Calculator Full-time equivalent. Labor Cost Calculator Total labor cost. Hours Worked Calculator Calculate hours worked from start, end and breaks.