Which PE-22-28 fill has the lowest price per mg at Webb Peptides?

PE-22-28 10 mg, at $0.76 per mg ($76.00 for 100 mg).

How much does the largest PE-22-28 box hold?

PE-22-28 10 mg: 10 × 10 mg vials make 100 mg, for $76.00.

Does a bigger PE-22-28 fill always cost less per mg?

At Webb Peptides, yes for every step of this ladder: each larger fill works out lower per mg than the one below it.

Price per mg

PE-22-28 price per mg

Webb Peptides lists PE-22-28 in 2 vial fills, from 5 mg to 10 mg, each sold by the box of 10 vials. Per mg, the PE-22-28 10 mg box is the lowest at $0.76 per mg. Every figure below comes from the live listings.

PE-22-28 fills compared
Listing	Fill	Box contents	Box price	Per vial	Per mg	Against the lowest
PE-22-28 5 mg	5 mg	50 mg	$46.00	$4.60	$0.92	+21%
PE-22-28 10 mg	10 mg	100 mg	$76.00	$7.60	$0.76	lowest

Step by step up the ladder

5 mg → 10 mg: 2 times the contents for $30.00 more a box; per mg the price falls by 17%.

With shipping added

Shipping is $90.00 for up to 4 boxes in one order, so its share of each box depends on the order size. Per mg including that share:

Listing	1 box alone	4 boxes in the order
PE-22-28 5 mg	$2.72	$1.37
PE-22-28 10 mg	$1.66	$0.98

The arithmetic is in the note on landed cost.

Answers from these figures

Which PE-22-28 fill has the lowest price per mg at Webb Peptides?: PE-22-28 10 mg, at $0.76 per mg ($76.00 for 100 mg).
How much does the largest PE-22-28 box hold?: PE-22-28 10 mg: 10 × 10 mg vials make 100 mg, for $76.00.
Does a bigger PE-22-28 fill always cost less per mg?: At Webb Peptides, yes for every step of this ladder: each larger fill works out lower per mg than the one below it.

Webb Peptides supplies materials for in-vitro laboratory research only, not for human or veterinary use and not for diagnostic or therapeutic use. Webb sells nothing intended to be consumed.