Free Tool · Allowed Downtime Calculator
Your runtime guarantee allows each unit a few hours of downtime a month. Past that, the rental company owes you a credit. Here’s exactly where that line falls.
Estimates are fine. Every result updates as you type.
Hours each unit may be down before a credit is owed.
| Guarantee | 28 days | 29 days | 30 days | 31 days |
|---|---|---|---|---|
| 95% | 33 h 36 m | 34 h 48 m | 36 h 00 m | 37 h 12 m |
| 96% | 26 h 53 m | 27 h 50 m | 28 h 48 m | 29 h 46 m |
| 97% | 20 h 10 m | 20 h 53 m | 21 h 36 m | 22 h 19 m |
| 98% | 13 h 26 m | 13 h 55 m | 14 h 24 m | 14 h 53 m |
| 98.5% | 10 h 05 m | 10 h 26 m | 10 h 48 m | 11 h 10 m |
| 98.6% | 9 h 24 m | 9 h 45 m | 10 h 05 m | 10 h 25 m |
| 99% | 6 h 43 m | 6 h 58 m | 7 h 12 m | 7 h 26 m |
| 99.5% | 3 h 22 m | 3 h 29 m | 3 h 36 m | 3 h 43 m |
Get the one-page PDF report by email, with everything you entered and a link that reopens this page with your numbers filled in.
The same arithmetic Vendor Callout runs on every unit, every month, before the vendor meeting.
allowed = (100% − guarantee) × days in the month × 24
Hours in the month are 672, 696, 720 or 744, never a 730-hour average.
hourly rental = monthly rental ÷ hours in the month
Most contracts credit each excess hour at the unit’s own hourly rental.
credit = max(0, hours down − allowed) × hourly rental
Assumes this outage is the unit’s only downtime in the month.
fleet hours = allowed per unit × units
A total for planning. Credits are still owed unit by unit.
Downtime is costing you MILLIONS!
Vendor Callout logs each outage from the truck, prices every down-hour and every deferred barrel as it happens, and prints the vendor report that recovers the credit.