Beehive Weight Monitor Calculator
Track beehive weight to monitor winter honey stores and estimate how long your bees can survive before needing supplemental feeding.
Monitoring hive weight is one of the most reliable ways to assess colony health and winter survival prospects. A colony needs sufficient honey stores to survive the winter when foraging is impossible.
Key Weights
A standard Langstroth hive has known component weights:
- Deep box (empty): ~5 kg (11 lbs)
- Medium super (empty): ~3.5 kg (7.7 lbs)
- Bottom board: ~2.5 kg (5.5 lbs)
- Inner cover + outer cover: ~4 kg (8.8 lbs)
- 10 deep frames with drawn comb (empty): ~4 kg (8.8 lbs)
- Bees (full colony): ~2–3 kg (4.4–6.6 lbs)
Honey Store Calculation
Honey Stores (kg) = Total Hive Weight − Empty Equipment Weight − Bee Weight
A full deep frame of capped honey weighs about 3.4 kg (7.5 lbs). A full medium frame holds about 2.3 kg (5 lbs).
Winter Consumption Rates
Consumption depends heavily on climate:
| Climate Zone | Monthly Consumption | Winter Length | Total Needed |
|---|---|---|---|
| Mild (Southern US) | 2–3 kg/month | 2–3 months | 8–12 kg |
| Moderate (Mid-Atlantic) | 3–4 kg/month | 4–5 months | 15–22 kg |
| Cold (Northern US/Canada) | 4–6 kg/month | 5–7 months | 27–40 kg |
| Very Cold (Alaska/Scandinavia) | 5–7 kg/month | 6–8 months | 35–50 kg |
Worked Example
Total hive weight: 45 kg. Equipment: 2 deeps + bottom + covers = 22 kg. Bees: 2.5 kg. Honey stores = 45 − 22 − 2.5 = 20.5 kg
In a moderate climate consuming 3.5 kg/month over 5 months = 17.5 kg needed. Surplus: 20.5 − 17.5 = 3 kg surplus — the colony should survive winter comfortably.
If stores fall below the needed amount, consider feeding 2:1 sugar syrup (in fall) or fondant/candy boards (in winter). Weigh hives monthly or use a hive scale for continuous monitoring. A sudden weight drop of more than 1 kg in a week during winter may indicate a problem.