When is it cheaper to rent a 25KW Diesel Whisperwatt Generator by the week than by the day?

From day 4. 4 days at the $85 day rate would be $340, but the weekly rate caps it at $339.

When is it cheaper to rent a 25KW Diesel Whisperwatt Generator on the 28-day rate?

From day 23. At that point the week-and-day composition reaches the $1,148 28-day rate, and the price stops climbing for the rest of the cycle.

Break-even duration

Equipment rents on three rates — a day rate, a week rate and a 28-day rate — and the cheapest one changes as the job runs long. This finds the two days where it changes, on a real listing’s real published rates.

25KW Diesel Whisperwatt Generator

See the listing →

JCarr Rentals · Generators - Gas

Day: $85
Week: $339
28 days: $1,148

Daily stops winning on

day 4

4 days at the day rate would be $340. On the week rate it is $339.

Weekly stops winning on

day 23

23 days at the day rate would be $1,955. On the 28-day rate it is $1,148.

The working

Whole weeks bill at the week rate; the leftover days bill at the day rate but never add up to more than one extra week; and a whole 28-day cycle never costs more than the 28-day rate. That is the rule, applied one day at a time.

Rental price by duration for 25KW Diesel Whisperwatt Generator, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$85	$85	—	day
2	$170	$170	—	day
3	$255	$255	—	day
4	$340	$339	you save $1	week
5	$425	$339	you save $86	week
6	$510	$339	you save $171	week
7	$595	$339	you save $256	week
8	$680	$424	you save $256	week
9	$765	$509	you save $256	week
10	$850	$594	you save $256	week
11	$935	$678	you save $257	week
12	$1,020	$678	you save $342	week
13	$1,105	$678	you save $427	week
14	$1,190	$678	you save $512	week
15	$1,275	$763	you save $512	week
16	$1,360	$848	you save $512	week
17	$1,445	$933	you save $512	week
18	$1,530	$1,017	you save $513	week
19	$1,615	$1,017	you save $598	week
20	$1,700	$1,017	you save $683	week
21	$1,785	$1,017	you save $768	week
22	$1,870	$1,102	you save $768	week
23	$1,955	$1,148	you save $807	28-day
24	$2,040	$1,148	you save $892	28-day
25	$2,125	$1,148	you save $977	28-day
26	$2,210	$1,148	you save $1,062	28-day
27	$2,295	$1,148	you save $1,147	28-day
28	$2,380	$1,148	you save $1,232	28-day
29	$2,465	$1,233	you save $1,232	day
30	$2,550	$1,318	you save $1,232	day
31	$2,635	$1,403	you save $1,232	day
32	$2,720	$1,487	you save $1,233	week
33	$2,805	$1,487	you save $1,318	week
34	$2,890	$1,487	you save $1,403	week
35	$2,975	$1,487	you save $1,488	week

Rental rates only. Protection and the marketplace service fee are added on top — see the checkout figure below.

What checkout will quote you

Our pricing service couldn’t be reached just now, so there’s no checkout figure to show. The rate table above is unaffected — it’s the operator’s published card.

Pick a listing

The numbers come from one operator’s published rates, so the tool needs to know whose.

Where these numbers come from

The rates are the operator’s own, read live from their listing. The arithmetic is the same best-price billing engine that produces 2Quip invoices — not a second copy written for this page — run on the industry-standard terms: a 28-day cycle, whole weeks at the week rate, leftover days at the day rate capped at one more week.

An operator can agree different terms on an individual rental, and a long rental bills per 28-day cycle rather than in one lump. So treat this as what the rate card says, and the operator’s quote as what you are agreeing to.