When is it cheaper to rent a Tromb 400 Dust Extractor by the week than by the day?

From day 7. 7 days at the $200 day rate would be $1,400, but the weekly rate caps it at $1,204.

When is it cheaper to rent a Tromb 400 Dust Extractor on the 28-day rate?

From day 20. At that point the week-and-day composition reaches the $3,600 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.

Tromb 400 Dust Extractor

See the listing →

Paul Kent · Concrete - Dust Vacuums

Day: $200
Week: $1,204
28 days: $3,600

Daily stops winning on

day 7

7 days at the day rate would be $1,400. On the week rate it is $1,204.

Weekly stops winning on

day 20

20 days at the day rate would be $4,000. On the 28-day rate it is $3,600.

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 Tromb 400 Dust Extractor, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$200	$200	—	day
2	$400	$400	—	day
3	$600	$600	—	day
4	$800	$800	—	day
5	$1,000	$1,000	—	day
6	$1,200	$1,200	—	day
7	$1,400	$1,204	you save $196	week
8	$1,600	$1,404	you save $196	week
9	$1,800	$1,604	you save $196	week
10	$2,000	$1,804	you save $196	week
11	$2,200	$2,004	you save $196	week
12	$2,400	$2,204	you save $196	week
13	$2,600	$2,404	you save $196	week
14	$2,800	$2,408	you save $392	week
15	$3,000	$2,608	you save $392	week
16	$3,200	$2,808	you save $392	week
17	$3,400	$3,008	you save $392	week
18	$3,600	$3,208	you save $392	week
19	$3,800	$3,408	you save $392	week
20	$4,000	$3,600	you save $400	28-day
21	$4,200	$3,600	you save $600	28-day
22	$4,400	$3,600	you save $800	28-day
23	$4,600	$3,600	you save $1,000	28-day
24	$4,800	$3,600	you save $1,200	28-day
25	$5,000	$3,600	you save $1,400	28-day
26	$5,200	$3,600	you save $1,600	28-day
27	$5,400	$3,600	you save $1,800	28-day
28	$5,600	$3,600	you save $2,000	28-day
29	$5,800	$3,800	you save $2,000	day
30	$6,000	$4,000	you save $2,000	day
31	$6,200	$4,200	you save $2,000	day
32	$6,400	$4,400	you save $2,000	day
33	$6,600	$4,600	you save $2,000	day
34	$6,800	$4,800	you save $2,000	day
35	$7,000	$4,804	you save $2,196	week

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

What checkout will quote you

Rental · 20 days: $3,600
Rental protection (RPP): $540
Service fee: $360
Estimated total: $4,500

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.