How much minoxidil do I need? 6, 12 or 18-month supply
The math is simpler than it looks: at the labeled dose, one 2 fl oz bottle lasts roughly a month. The real question is how far ahead you want to buy.
Last reviewed August 5, 2026
How long one bottle lasts
The label directs 1 mL twice a day — 2 mL per day. A 2 fl oz bottle holds 60 mL, so:
60 mL ÷ 2 mL per day = 30 days
One bottle per month, near enough. That's why supplies are sold in 6, 12 and 18-bottle packs — they map to 6, 12 and 18 months of use at the labeled dose.
In practice a bottle may stretch slightly further if you're treating a small area, or run short if you spill or overfill the dropper. Plan on a month per bottle and you won't run out mid-treatment.
Why buying further ahead makes sense
Minoxidil isn't a course of treatment with an end date. The manufacturer's leaflet is direct about this: continued use is necessary to keep regrowth, and if you stop, regrown hair is lost within 3 to 4 months. Anyone who responds to it is looking at ongoing use.
That changes the buying decision. The risk of a bigger supply isn't waste — it's only that you might discontinue. The label suggests evaluating at the 4-month mark, so a 6-month supply covers a fair first trial comfortably.
Current cost per bottle
| Supply | Bottles | Price | Per bottle |
|---|---|---|---|
| 6-month supply | 6 × 2 fl oz | $34.99 | $5.83 |
| 12-month supply | 12 × 2 fl oz | $64.99 | $5.42 |
| 18-month supply | 18 × 2 fl oz | $89.99 | $5.00 |
Prices shown are current on this site and include free US shipping.
Which should you pick?
- First time trying minoxidil? The 6-month supply covers the full evaluation window the label describes (results may appear at 2 months; some men need 4) with room to spare.
- Already using it and it's working? The 12 or 18-month supply lowers your cost per bottle and removes the risk of a gap in use — which matters, since stopping reverses regrowth.
- Worried about expiration?We ship sealed cartons with the manufacturer's printed dates and comfortable shelf life remaining. If you want the date on a specific lot before ordering an 18-month supply, just ask us.
Related
This guide summarizes information from the manufacturer's Drug Facts label and consumer leaflet for minoxidil topical solution 5%. It is not medical advice. Read the full label before use and use only as directed. Talk to a doctor if you have questions about whether this product is right for you. — US Minoxidil