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.

Ryobi 40V 4 Ah Battery

See the listing →

Stephen Williams · Batteries and Charging Equipment

Day
$4
Week
$12
28 days
$30

Daily stops winning on

day 4

4 days at the day rate would be $16. On the week rate it is $12.

Weekly stops winning on

day 16

16 days at the day rate would be $64. On the 28-day rate it is $30.

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 Ryobi 40V 4 Ah Battery, days 1 to 35
DaysAt the day rateOn the ladderDifferenceRate in play
1$4$4—day
2$8$8—day
3$12$12—day
4$16$12you save $4week
5$20$12you save $8week
6$24$12you save $12week
7$28$12you save $16week
8$32$16you save $16week
9$36$20you save $16week
10$40$24you save $16week
11$44$24you save $20week
12$48$24you save $24week
13$52$24you save $28week
14$56$24you save $32week
15$60$28you save $32week
16$64$30you save $3428-day
17$68$30you save $3828-day
18$72$30you save $4228-day
19$76$30you save $4628-day
20$80$30you save $5028-day
21$84$30you save $5428-day
22$88$30you save $5828-day
23$92$30you save $6228-day
24$96$30you save $6628-day
25$100$30you save $7028-day
26$104$30you save $7428-day
27$108$30you save $7828-day
28$112$30you save $8228-day
29$116$34you save $82day
30$120$38you save $82day
31$124$42you save $82day
32$128$42you save $86week
33$132$42you save $90week
34$136$42you save $94week
35$140$42you save $98week

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
$30
Rental protection (RPP)
$4.50
Service fee
$3
Estimated total
$37.50

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.