When is it cheaper to rent a Stihl KM91r Kombi with Hedge Trimmer by the week than by the day?

From day 4. 4 days at the $42.50 day rate would be $170, but the weekly rate caps it at $161.50.

When is it cheaper to rent a Stihl KM91r Kombi with Hedge Trimmer on the 28-day rate?

From day 22. At that point the week-and-day composition reaches the $510 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.

Stihl KM91r Kombi with Hedge Trimmer

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Mason N/A · Lawn Edgers - Gasoline

Day: $42.50
Week: $161.50
28 days: $510

Daily stops winning on

day 4

4 days at the day rate would be $170. On the week rate it is $161.50.

Weekly stops winning on

day 22

22 days at the day rate would be $935. On the 28-day rate it is $510.

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 Stihl KM91r Kombi with Hedge Trimmer, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$42.50	$42.50	—	day
2	$85	$85	—	day
3	$127.50	$127.50	—	day
4	$170	$161.50	you save $8.50	week
5	$212.50	$161.50	you save $51	week
6	$255	$161.50	you save $93.50	week
7	$297.50	$161.50	you save $136	week
8	$340	$204	you save $136	week
9	$382.50	$246.50	you save $136	week
10	$425	$289	you save $136	week
11	$467.50	$323	you save $144.50	week
12	$510	$323	you save $187	week
13	$552.50	$323	you save $229.50	week
14	$595	$323	you save $272	week
15	$637.50	$365.50	you save $272	week
16	$680	$408	you save $272	week
17	$722.50	$450.50	you save $272	week
18	$765	$484.50	you save $280.50	week
19	$807.50	$484.50	you save $323	week
20	$850	$484.50	you save $365.50	week
21	$892.50	$484.50	you save $408	week
22	$935	$510	you save $425	28-day
23	$977.50	$510	you save $467.50	28-day
24	$1,020	$510	you save $510	28-day
25	$1,062.50	$510	you save $552.50	28-day
26	$1,105	$510	you save $595	28-day
27	$1,147.50	$510	you save $637.50	28-day
28	$1,190	$510	you save $680	28-day
29	$1,232.50	$552.50	you save $680	day
30	$1,275	$595	you save $680	day
31	$1,317.50	$637.50	you save $680	day
32	$1,360	$671.50	you save $688.50	week
33	$1,402.50	$671.50	you save $731	week
34	$1,445	$671.50	you save $773.50	week
35	$1,487.50	$671.50	you save $816	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 · 22 days: $510
Rental protection (RPP): $76.50
Service fee: $51
Estimated total: $637.50

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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.