Hours Calculator
Build timesheets, add and subtract durations, convert between time formats, and calculate billable earnings — with full overtime detection for weekly schedules.
Hours Calculator
4 tools — pick a tab below
Timesheet Builder
Clock-in / clock-out with break deduction
Total Hours
40h 00m
Decimal Hrs
40.00
Avg / Day
8h 00m
Total Earned
$1,000.00
Quick Reference
Decimal Hours
Minutes ÷ 6090 min ÷ 60 = 1.5 hrs
Minutes
Decimal Hrs × 601.5 × 60 = 90 min
Worked Time
Out − In − Break17:30 − 09:00 − 30m = 8h
Earnings
Hours × Hourly Rate8 × $25 = $200
OT Pay
OT Hours × Rate × Mult2h × $25 × 1.5 = $75
Compound Durations
(h₁×60+m₁) ± (h₂×60+m₂)2h30 + 1h45 = 4h15
Minute → Decimal
Turn hours into an invoice
Log your hours, then generate a professional invoice for your client in seconds.
Create a Timesheet Invoice →Time tracking made simple
Timesheet Builder
Enter clock-in and clock-out times for each work period. Break time is automatically deducted. Each row calculates worked hours and earnings at your rate.
Duration Arithmetic
Add and subtract time durations without needing a clock. Useful for combining multiple work sessions or deducting non-billable time.
Format Conversion
Convert decimal hours (e.g. 7.75) to HH:MM (07:45) or total minutes/seconds. Essential for invoicing software that uses different formats.
Overtime Detection
Set daily and weekly hour limits. The calculator automatically flags overtime hours and computes overtime pay at your chosen multiplier (e.g. 1.5×).
Bill your clients accurately
Decimal for invoices
Most billing software expects decimal hours. 2h 45m = 2.75 hrs. Use the converter tab to get the right format.
Know your OT rules
Overtime law varies by country and state. Some calculate OT daily (>8h), others weekly (>40h). Configure both thresholds.
Track your breaks
Deducting unpaid breaks ensures you only invoice billable time. 30 min lunch on an 8-hour day = 7.5 billable hours.
Match your timesheet
Use the Timesheet Builder to track real days, then copy totals directly into your TradingForms invoice.
Hours tracked?
Now send a professional invoice.
TradingForms generates polished time-based invoices with your hours, rate, and totals — ready to send in seconds.