COLONY HEALTH · PRINTABLE
Varroa Wash Percentage Cheat Sheet
Convert mite counts from a common 300-bee wash sample into mites per 100 bees. The chart performs arithmetic only; management thresholds depend on current guidance and context.
Guide reviewed September 16, 2026.
USE THE LIVE CALCULATORHave your actual mite count?
Open Varroa Wash Calculator →Enter mites counted and sample size to calculate mites per 100 bees using any sample size.
BeekeeperCalc.comVarroa Wash Percentage Cheat Sheet
Formula: mites counted ÷ bees sampled × 100 = mites per 100 bees (%).
1% in a 300-bee sample≈ 3 mites
2% in a 300-bee sample≈ 6 mites
3% in a 300-bee sample≈ 9 mites
| Mites in 300 bees | Infestation % | Mites / 100 bees |
|---|---|---|
| 0 | 0.00% | 0.00 mites / 100 bees |
| 1 | 0.33% | 0.33 mites / 100 bees |
| 2 | 0.67% | 0.67 mites / 100 bees |
| 3 | 1.00% | 1.00 mites / 100 bees |
| 4 | 1.33% | 1.33 mites / 100 bees |
| 5 | 1.67% | 1.67 mites / 100 bees |
| 6 | 2.00% | 2.00 mites / 100 bees |
| 7 | 2.33% | 2.33 mites / 100 bees |
| 8 | 2.67% | 2.67 mites / 100 bees |
| 9 | 3.00% | 3.00 mites / 100 bees |
| 10 | 3.33% | 3.33 mites / 100 bees |
| 11 | 3.67% | 3.67 mites / 100 bees |
| 12 | 4.00% | 4.00 mites / 100 bees |
| 13 | 4.33% | 4.33 mites / 100 bees |
| 14 | 4.67% | 4.67 mites / 100 bees |
| 15 | 5.00% | 5.00 mites / 100 bees |
This chart calculates the percentage; it does not choose a treatment threshold. Compare the result with current local, seasonal, extension, or Honey Bee Health Coalition guidance appropriate to your operation.
For any sample size and an editable comparison benchmark: BeekeeperCalc.com/calculators/varroa-mite-calculator/