Nasal spray calculator
A pump gives whole sprays and nothing in between. Put in the peptide, the water and the pump size — get micrograms per spray, how many sprays make your dose, and how far the bottle really goes.
Sterile or deionized water — not BAC water. The benzyl alcohol that preserves BAC water irritates nasal passages.
95 sprays
5 sprays — alternate nostrils, they don't split evenly
✓ Lands exactly on 5 sprays
This bottle
19
doses of 500 mcg
95 usable sprays out of 10 ml — priming and dead volume already taken off.
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The link carries the bottle and the pump. Paste it in a thread and it opens filled in.
Recipe card
An image of this bottle, for threads that want a picture. It leads with micrograms per spray — the one figure that stays true whatever dose the reader takes — and carries the sterile-water note with it.
0.4 mg lost to priming and dead volume
Nasal spray questions
- Can I use bacteriostatic water for a nasal spray?
- No. Bacteriostatic water is preserved with benzyl alcohol, which is fine for a subcutaneous injection and an irritant on nasal mucosa. Nasal sprays are mixed with sterile or deionized water.
- How many micrograms is one spray?
- Concentration times the pump's metered volume. A 10 mg peptide in 10 ml is 1 mg/ml, and a standard 0.1 ml pump delivers 0.1 ml — so 100 mcg per spray.
- Why can't I dose 750 mcg?
- A pump delivers one metered volume per actuation and nothing in between, so a dose has to be a whole number of sprays. At 100 mcg per spray, 750 mcg is seven and a half. Either take 800, or mix at a strength where 750 lands cleanly — this calculator suggests one.
- How many sprays are actually in a 10 ml bottle?
- Fewer than 100. A fresh pump sprays air for the first few actuations, and the dip tube can't reach the last of the liquid. With three priming sprays and 0.1 ml of dead volume, a 10 ml bottle on a 0.1 ml pump gives 95 — and about 0.4 mg of a 10 mg bottle never leaves the glass.
- Should I split a dose between nostrils?
- Even spray counts split evenly, which is how most people take them. Odd counts don't — the calculator says so rather than letting you find out holding the bottle.