When is it cheaper to rent a 18” disk Stump Grinder by the week than by the day?

From day 5. 5 days at the $347 day rate would be $1,735, but the weekly rate caps it at $1,388.

When is it cheaper to rent a 18” disk Stump Grinder on the 28-day rate?

From day 18. At that point the week-and-day composition reaches the $4,164 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.

18” disk Stump Grinder

See the listing →

Simon Equipment Rentals · Stump Grinder - Self-Propelled - Gasoline

Day: $347
Week: $1,388
28 days: $4,164

Daily stops winning on

day 5

5 days at the day rate would be $1,735. On the week rate it is $1,388.

Weekly stops winning on

day 18

18 days at the day rate would be $6,246. On the 28-day rate it is $4,164.

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 18” disk Stump Grinder, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$347	$347	—	day
2	$694	$694	—	day
3	$1,041	$1,041	—	day
4	$1,388	$1,388	—	day
5	$1,735	$1,388	you save $347	week
6	$2,082	$1,388	you save $694	week
7	$2,429	$1,388	you save $1,041	week
8	$2,776	$1,735	you save $1,041	week
9	$3,123	$2,082	you save $1,041	week
10	$3,470	$2,429	you save $1,041	week
11	$3,817	$2,776	you save $1,041	week
12	$4,164	$2,776	you save $1,388	week
13	$4,511	$2,776	you save $1,735	week
14	$4,858	$2,776	you save $2,082	week
15	$5,205	$3,123	you save $2,082	week
16	$5,552	$3,470	you save $2,082	week
17	$5,899	$3,817	you save $2,082	week
18	$6,246	$4,164	you save $2,082	28-day
19	$6,593	$4,164	you save $2,429	28-day
20	$6,940	$4,164	you save $2,776	28-day
21	$7,287	$4,164	you save $3,123	28-day
22	$7,634	$4,164	you save $3,470	28-day
23	$7,981	$4,164	you save $3,817	28-day
24	$8,328	$4,164	you save $4,164	28-day
25	$8,675	$4,164	you save $4,511	28-day
26	$9,022	$4,164	you save $4,858	28-day
27	$9,369	$4,164	you save $5,205	28-day
28	$9,716	$4,164	you save $5,552	28-day
29	$10,063	$4,511	you save $5,552	day
30	$10,410	$4,858	you save $5,552	day
31	$10,757	$5,205	you save $5,552	day
32	$11,104	$5,552	you save $5,552	day
33	$11,451	$5,552	you save $5,899	week
34	$11,798	$5,552	you save $6,246	week
35	$12,145	$5,552	you save $6,593	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 · 18 days: $4,164
Rental protection (RPP): $624.60
Service fee: $416.40
Estimated total: $5,205

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.