When is it cheaper to rent a stud finder with edge finding capabilities by the week than by the day?

From day 3. 3 days at the $10 day rate would be $30, but the weekly rate caps it at $28.

When is it cheaper to rent a stud finder with edge finding capabilities on the 28-day rate?

From day 16. At that point the week-and-day composition reaches the $72 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.

stud finder with edge finding capabilities

See the listing →

Joshua Cox · Surveying Tools

Day: $10
Week: $28
28 days: $72

Daily stops winning on

day 3

3 days at the day rate would be $30. On the week rate it is $28.

Weekly stops winning on

day 16

16 days at the day rate would be $160. On the 28-day rate it is $72.

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 stud finder with edge finding capabilities, days 1 to 35
Days	At the day rate	On the ladder	Difference	Rate in play
1	$10	$10	—	day
2	$20	$20	—	day
3	$30	$28	you save $2	week
4	$40	$28	you save $12	week
5	$50	$28	you save $22	week
6	$60	$28	you save $32	week
7	$70	$28	you save $42	week
8	$80	$38	you save $42	week
9	$90	$48	you save $42	week
10	$100	$56	you save $44	week
11	$110	$56	you save $54	week
12	$120	$56	you save $64	week
13	$130	$56	you save $74	week
14	$140	$56	you save $84	week
15	$150	$66	you save $84	week
16	$160	$72	you save $88	28-day
17	$170	$72	you save $98	28-day
18	$180	$72	you save $108	28-day
19	$190	$72	you save $118	28-day
20	$200	$72	you save $128	28-day
21	$210	$72	you save $138	28-day
22	$220	$72	you save $148	28-day
23	$230	$72	you save $158	28-day
24	$240	$72	you save $168	28-day
25	$250	$72	you save $178	28-day
26	$260	$72	you save $188	28-day
27	$270	$72	you save $198	28-day
28	$280	$72	you save $208	28-day
29	$290	$82	you save $208	day
30	$300	$92	you save $208	day
31	$310	$100	you save $210	week
32	$320	$100	you save $220	week
33	$330	$100	you save $230	week
34	$340	$100	you save $240	week
35	$350	$100	you save $250	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 · 16 days: $72
Rental protection (RPP): $10.80
Service fee: $7.20
Estimated total: $90

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.