Man-Hours Calculator
Calculate total man-hours by multiplying workers by hours worked. Estimate project staffing needs, labor productivity, and total labor cost with breakdowns and charts.
About This Calculator
The Man-Hours Calculator helps project managers, business owners, freelancers, and HR professionals calculate the total labor hours required for any project or task. By multiplying the number of workers by the hours each person works, you get the total man-hours — a fundamental metric for workforce planning, cost estimation, and productivity analysis.
The calculator works in two modes. In basic mode, enter the number of people and hours per person to get total man-hours and man-days (based on 8-hour workdays). This helps you estimate how long a project will take or how many people you need. In cost mode, add an hourly pay rate to calculate total labor cost and cost per person — essential for budgeting and quoting projects.
The formula used is: Man-hours = People × Hours per Person. Man-days = Man-hours ÷ 8. Total Cost = Man-hours × Hourly Pay. Cost per Person = Total Cost ÷ Number of People.
Regional Notes
India: Standard workday is 8-9 hours with a 48-hour work week (factories) or 40-48 hours (offices). Overtime is paid at double the ordinary rate (Factories Act, 1948). Hourly rates vary widely from ₹200-₹500 for unskilled labor to ₹1,000-₹5,000+ for skilled professionals.
United States: Standard full-time is 8 hours/day, 40 hours/week. Overtime at 1.5× applies over 40 hours (FLSA). Average hourly wages range from $15 minimum wage to $50+ for skilled trades and professionals. Man-hour tracking is critical for government contracts (Davis-Bacon Act) and construction projects.
United Kingdom: Standard working week is 35-40 hours (48-hour max under Working Time Regulations). National Living Wage is £11.44/hour (2024). Man-hour calculations are commonly used in construction, manufacturing, and service industries for project estimation and cost control.
Frequently Asked Questions
What are man-hours and how do you calculate them?
Man-hours measure the total work hours completed by a group of people. The formula is: Man-hours = Number of People × Hours Worked per Person. For example, 5 people working 8 hours each produces 40 man-hours.
How do you convert man-hours to man-days?
To convert man-hours to man-days, divide total man-hours by 8 (standard working hours per day). For example, 160 man-hours equals 20 man-days. This helps estimate how many workdays a project requires.
How do you calculate the total cost of man-hours?
Multiply total man-hours by the hourly pay rate. Total Cost = Man-hours × Hourly Pay. For instance, 100 man-hours at ₹500/hour (India), $25/hour (US), or £20/hour (UK) gives the total labor cost.
What is the difference between man-hours and man-days?
Man-hours count total individual hours worked (5 people × 8 hours = 40 man-hours). Man-days divide that by 8 to show the equivalent in standard workdays (40 man-hours ÷ 8 = 5 man-days). Man-days are useful for project timeline estimation.
How many man-hours in a standard work week?
A standard full-time employee works 40 hours per week (8 hours/day × 5 days). For a team of 5, that equals 200 man-hours per week. Adjust for part-time staff by multiplying actual hours worked per person.
Can this calculator help with project staffing planning?
Yes. If you know total man-hours needed for a project, divide by available hours per person to determine how many people you need. Or divide by number of people to find hours each person must work. This helps optimize team size and deadlines.
Is the man-hours calculator free to use?
Yes, it is completely free to use with no registration or login required. You can share your calculation results via URL.