Working Hours Calculator

Total work hours = business days × hours/day, optionally including weekends.

Inputs

Use business-days-calculator for the count.

Result

Loading calculator…
—

General calculation reads

Amazon affiliate
How Not to Be Wrong
Jordan Ellenberg - math thinking
Shop on Amazon
The Joy of X
Steven Strogatz - accessible math
Shop on Amazon
Scientific calculator (Casio fx-991EX)
Shop on Amazon

As an Amazon Associate we may earn from qualifying purchases. This does not add cost for you.

How to use this calculator

  • Enter business days (use business-days-calculator).
  • Enter hours/day (8 typical).
  • Read total hours.

About this calculator

Multiplier: business days × hours per day. Useful for project staffing estimates ("we have 22 business days × 8 hours = 176 hours of capacity"). Combine with hourly rates for cost.

Frequently asked

Should I include lunch?+
Convention: count only "billable" or "productive" hours. A 9-5 with 1-hour lunch is 7 hours. A 9-5 with 30-min unpaid lunch is 7.5.
Part-time?+
Use proportional hours/day (e.g., 4 hours/day × 22 days = 88 hours).
Overtime?+
Not modeled. For OT-aware calculations, use time-card-weekly which handles 40+ hour weeks separately.
Does this account for vacation/PTO?+
No — subtract those days from your business-day count manually.
Annual capacity?+
~250 business days × 8 hours = 2,000 hours/year (the standard "FTE" assumption).

Related calculators

Business Days Calculator
Count business days (Mon-Fri, excluding US federal holidays) between two dates.
Time Card Calculator (Single Day)
Hours worked = clock-out − clock-in − break minutes.
Weekly Time Card with Overtime
Enter daily hours; calculator splits into regular (≤40) and OT (>40).
Payroll Period Calculator
List the next 6 payday dates given period type and an anchor date.
Hours Between Times Calculator
Compute hours and minutes between two HH:MM times, handling overnight wrap.
Minutes to Hours Converter
Convert any number of minutes to hours, hours-and-minutes, and decimal hours.

More tools you might like

Hand-picked tools that pair well with this one — same audience, same intent.

Hours Between Times Calculator
Calc

Compute hours and minutes between two HH:MM times, handling overnight wrap.

Minutes to Hours Converter
Calc

Convert any number of minutes to hours, hours-and-minutes, and decimal hours.

Business Days Calculator
Calc

Count business days (Mon-Fri, excluding US federal holidays) between two dates.

Time Card Calculator (Single Day)
Calc

Hours worked = clock-out − clock-in − break minutes.

Weekly Time Card with Overtime
Calc

Enter daily hours; calculator splits into regular (≤40) and OT (>40).

Volunteer Hours Log
Docs

A volunteer hours log — date, hours, and activity per entry with an automatic total, plus volunteer/organization details and a supervisor verification signature.