Plan rentals precisely with workday windows, weekends, and rounding rules built in. Calculate billable hours, overtime, and costs for any equipment fast and clear.
| Start | End | Method | Workday | Increment | Billable Hours |
|---|---|---|---|---|---|
| 2026-02-01 08:00 | 2026-02-03 17:00 | Working | 08:00 + 8h | 0.5h | 24.0 |
| 2026-02-01 08:00 | 2026-02-02 20:00 | Calendar | Not used | 1.0h | 36.0 |
Examples are illustrative; your jobsite rules may differ.
Equipment rentals often drive critical-path productivity, so duration errors quickly become cost overruns. A single extra day of a telehandler, generator, or excavator can add transport fees, standby charges, and lost crew time. This calculator helps you forecast time using the same rules used on invoices.
Calendar time measures every hour between start and end, including nights and off-shift periods. Working time measures only overlap with your defined daily work window, excluding weekends and listed holidays if selected. Use calendar mode for continuous operations like dewatering pumps and lighting towers.
Most sites run 8–12 hour shifts. Setting a correct workday start and daily hours converts timestamps into practical, crew-based utilization. If your equipment is available but not operated outside the window, working mode provides a realistic utilization duration for planning deliveries and returns.
Many contracts stop billable time on weekends, while others continue billing if equipment remains onsite. The weekend toggle and holiday list let you model both conditions. Enter holiday dates in YYYY-MM-DD format to prevent inflated durations when sites close for scheduled shutdowns.
Vendors commonly bill in increments such as 0.5 hours or full hours, and may enforce minimum charges like 4 hours. The billable duration formula rounds up to the chosen increment and applies the minimum. This is the most frequent reason billable time exceeds raw time.
When daily utilization exceeds an overtime threshold, the calculator reports overtime hours. If you enter an overtime rate, those hours add to the subtotal. This is useful for equipment paired with extended shifts, night pours, or recovery work where operator and rental premiums apply.
Costing supports hourly, daily, weekly, and monthly base rates. Weekly units are derived from work-hours per day and workdays per week, while monthly units use your selected monthly billable days. Fuel surcharge and tax percentages are applied transparently to match typical rental billing structures.
Start by entering realistic timestamps from the schedule, then run working mode for planned usage and calendar mode for worst-case exposure. Compare outputs, align rounding with your vendor agreement, and export the report for supervisors and procurement. Small upfront checks reduce disputes at closeout.
Use calendar time for equipment that runs continuously or remains billable regardless of shifts, such as pumps, temporary power, lighting, security systems, or leased containers billed by elapsed time.
Billable hours are rounded up to your selected increment and must meet the minimum billable hours. These rules reflect common rental agreements and explain most increases over raw duration.
In working mode, any holiday dates you enter are excluded from billable overlap windows. This helps model shutdowns and prevents counting time on days when the site is closed.
Yes. In working mode it checks each day’s utilized hours against the overtime threshold. Overtime is reported and can be priced if you enter an overtime rate per hour.
Select weekly or monthly rate type. The calculator converts billable hours into whole billing units using your work schedule inputs and monthly billable days, then multiplies by the base rate.
Calculate each item separately when schedules differ. For identical start/end times and rules, reuse inputs and export each run. This improves traceability for equipment logs and invoices.
Save start/end timestamps, chosen method, work window, exclusions, rounding rules, and rate details. The CSV and PDF exports capture these fields and are useful during invoice reconciliation.
Many vendors bill by day, week, or month, not minutes.
Rounding and minimums can materially change total cost.
Accurate rental duration prevents delays, disputes, and overspending today.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.