AlpineCarnica · Tyrol, AT · Beginners · Jun 10, 2026
Bee math cheat sheet — pin this to the inside of your hive tool box
Every June I answer the same timing questions at our local club, so here's the table I make every beginner copy out by hand. 18 years in Tyrol and I still count on my fingers with these numbers.
Development, egg to emergence:
Worker — 21 days. Queen — 16 days. Drone — 24 days.
Breakdown: every caste spends 3 days as an egg. A worker is then an open (uncapped) larva for about 6 days, capped on day 9, and spends the remaining 12 days sealed. A queen is capped around day 8 and emerges on day 16. A drone is capped around day 10 and emerges on day 24.
Why it matters: see a capped worker cell today, a bee walks out within 12 days. No eggs but open larvae means the queen was laying within the last 9 days. Do a walk-away split and you shouldn't even look for eggs until roughly a month later.
What did I forget? Add your own numbers and memory tricks below.
#bee-math#brood-cycle#beginner#reference
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5 replies
ImkerinLena · Jun 10, 2026
Good table, AlpineCarnica. Two additions I drill into students: after emergence a new queen needs orientation and mating flights, so expect eggs roughly 23–28 days after the egg SHE came from was laid — patience saves many queens from being falsely declared failures. And drones aren't sexually mature until about 12–14 days after emergence, which matters for anyone timing queen rearing.
VTBeeHannah · Jun 10, 2026
The mnemonic that finally made it stick for me: 16, 21, 24 — royalty rushes, workers work at it, drones dawdle. Alphabetical order too: drone, queen, worker goes 24, 16, 21... okay that part doesn't help. But 3 days egg for everyone is the anchor.
BallaratBees · Jun 11, 2026
Bookmarking this from the wrong hemisphere — we're mid-winter in Victoria, girls clustered, and I'm doing my study season. The 'no eggs but open larvae = queen present within 9 days' line is the single most useful sentence for panicking beginners. Wish someone had told me in year one.
GalwayBees · Jun 11, 2026
Mine from a Galway old-timer: 'three, five, eight — then she's sealed her fate' for the queen (3 egg, ~5 days fed as larva, capped day 8). Second year and I still whisper it at the hive like a weirdo.
BethsBees · Jun 11, 2026
Copied into the notebook, thank you. One question — does temperature shift these at all? I've read capped worker brood can emerge a day early in hot weather, or is 21 basically fixed?