Pre-Harvest Interval Calculator
Treated for varroa and wondering if your honey is safe to pull? Pick your treatment and dates — the calculator returns a clear yes/no plus days remaining until harvest is safe. Free, no signup. All math happens in your browser.
The day strips came out or last application finished.
When you want to pull supers. Today is fine for a quick check.
Apivar requires a 14-day PHI. You are 0 days past the treatment end date — 14 more days until honey is safe to harvest. 14-day PHI after strip removal. Supers must be off during treatment.
Always follow the current product label
PHI requirements can change between label revisions and vary between countries. This calculator uses US/EU label values accurate to May 2026 but is informational only — always cross-check against the current product label and your local apiculture authority before harvesting honey for sale.
Related tools and reading
Varroa Mite Treatment Calculator
Sugar roll and alcohol wash mite counts → infestation percentage and treatment recommendation.
Full varroa treatment guide
Apivar, formic acid, oxalic acid, thymol — how each works, when to use it, what to watch for.
Track treatments in HiveSense
Treatment start, end, and PHI countdowns logged per hive with reminders for harvest windows.
Stop tracking PHI on paper
HiveSense logs treatment dates per hive, calculates PHI automatically, and warns you before pulling supers too early.
Read the full treatment guide