Time Card Calculator

What this time card calculator does

This calculator converts raw shift times into payroll-ready weekly totals. It handles daily start and end times, unpaid breaks, overnight shifts, regular vs overtime hour splits, and gross pay estimates from your hourly rate. It is useful for employees, managers, and freelancers who need a transparent time-to-money workflow.

How hours are calculated

Each row computes worked duration from start to end time, then subtracts unpaid break minutes. If a shift crosses midnight, the calculator treats it as overnight and adds the next-day rollover automatically. Weekly totals are produced by summing all daily worked-hour values.

Overtime calculation logic

The default model applies weekly overtime over 40 hours. You can enable daily overtime and define the daily threshold (for example, 8 hours). To avoid duplicate overtime counting, the calculator uses the larger of weekly overtime and daily-overtime totals. This creates a practical estimate when comparing policy variants.

Common use cases

Weekly payroll pre-check before timesheet approval.
Contractor and agency billing validation.
Shift optimization and staffing cost planning.
Overtime reduction scenarios for operations teams.
Reconciliation of paystub vs submitted hours.

Interpretation guide

Focus on regular and overtime hour split first, then gross pay. If gross pay appears high or low, check break settings and overnight entries. For teams with variable schedules, save a baseline week and then test peak weeks with additional shifts so budget planning is resilient.

Sources and references

U.S. Department of Labor overtime and hours-worked guidance.
State labor department overtime rules (where applicable).
ISO 8601 and common time representation conventions.

Frequently Asked Questions

How does this time card calculator handle breaks?

Break minutes are deducted from each day's worked duration after start/end time is calculated. This reflects how payroll systems usually treat unpaid breaks. If your employer uses paid breaks, set break minutes to zero or adjust your schedule line to match your paid-time policy.

Can this calculate overnight shifts?

Yes. If an end time is earlier than the start time, the calculator treats it as an overnight shift into the next day. This supports hospitality, healthcare, security, and operations teams that run night schedules and need accurate daily and weekly payroll totals.

Does it support overtime calculations?

Yes. The tool supports weekly overtime above 40 hours and an optional daily overtime rule above a custom daily threshold. To avoid double counting, overtime is calculated from the larger of weekly-overtime hours or daily-overtime total. This is practical for many payroll policy comparisons.

What if I have variable schedules each week?

This tool is built for exactly that. Update daily rows for each real shift, then compare totals week by week. You can also duplicate a baseline schedule manually and adjust only days that changed, which makes variable overtime forecasting and budgeting significantly easier.

Can I use this for freelancer invoicing?

Absolutely. Set your hourly rate and use the output gross pay as your weekly labor value. If you invoice with different client rates, run separate scenarios for each rate or track one client per sheet. This makes it useful beyond payroll for contract and agency billing workflows.

Why might payroll still differ from this output?

Employer payroll systems may apply rules for rounding, paid/unpaid break handling, holiday premiums, local overtime laws, and deduction timing. This calculator provides a transparent estimate and planning baseline. For final payroll values, always reconcile against your official payslip or payroll export.

Weekly Time Card

Pay Rules