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Hours Calculator

Use this hours calculator to estimate weekly work hours after breaks and calculate weekly pay from an hourly rate.

Live calculator

Hours calculator

Net weekly hours37.5 hours

40 gross hours before breaks.

Estimated weekly pay$937.50

Net weekly hours multiplied by hourly rate.

Monthly hours162.5 hours

Estimated using 4.333 weeks per month.

Formula

Weekly hours formula

Net weekly hours = hours per day x days per week - daily break hours x days per week

Monthly hours are estimated using 4.333 weeks per month.

How to use

Steps

  1. Enter hours worked per day.
  2. Enter days worked per week.
  3. Subtract break minutes if they are unpaid.
  4. Add hourly rate to estimate weekly pay.

Example

Sample calculation

Hours per day8
Days per week5
Break30 minutes/day
Net hours37.5/week

Calculator use

Best for

  • Checking calendar, work-hour, school, deadline, age, or duration math before copying the result elsewhere.
  • Comparing inclusive versus exclusive dates, breaks, grading weights, or time spans with the assumptions visible.

Before relying on it

Check first

  • Mixing inclusive and exclusive date counting, time zones, overnight shifts, unpaid breaks, holidays, or school-specific grading rules.
  • Rounding time or grades too early and then using the rounded result in another calculation.
  • Treating a planning result as payroll, HR, transcript, legal deadline, or official school policy.

Details

What to know before using the result

Break treatmentSubtract unpaid breaks

Enter break minutes only when they should not count as paid work time. Paid breaks should remain in the hours total.

Monthly estimate4.333 weeks per month

Monthly hours are estimated from the average number of weeks in a year divided by 12, not from one specific calendar month.

Pay resultGross estimate

Estimated pay is before overtime rules, payroll tax withholding, benefits, retirement contributions, and other deductions.

Source notes

References used for this calculator

Legal Information InstituteReprints 29 CFR 785.18, the federal rule explaining how short rest periods are counted as hours worked.

Benchmarks

How to read the result

20 hours: Part-time.

Common weekly range for part-time work.

37.5 - 40 hours: Full-time.

Common full-time weekly schedule range.

40+ hours: Overtime check.

Check local overtime rules and pay rates when hours exceed standard thresholds.

Calculator accuracy

Methodology and assumptions

Formula, inputs, limitations and review record
Formula

Net weekly hours = hours per day x days per week - daily break hours x days per week

Inputs used

Hours per day, Days per week, Break minutes, Hourly rate

Limitations

Everyday results are quick planning checks. Unit choices, rounding, labels, measurements, local prices, and real-world constraints can change the final decision.

Review record

Catalog QA baseline on June 6, 2026. This date marks the catalog-wide automated and editorial QA baseline, not a tool-specific expert review.

Cite this page

Toolkit Shelf. Hours Calculator. https://toolkitshelf.com/tools/hours-calculator

FAQ

Common questions

How do I calculate weekly work hours?

Multiply hours per day by days per week, then subtract unpaid break time.

How are monthly hours estimated?

This calculator multiplies weekly hours by 4.333, the average number of weeks per month.

Does this calculate overtime?

No. It estimates hours and pay using one hourly rate. Overtime rules can vary.