# BeeCalc (Včelkulačka) — Beekeeper's Calculator

> Free online calculator for beekeepers by Beentry (PunkHive s.r.o.)
> Last updated: 2026-04-10
> License: Free to use, free to cite

## What is BeeCalc?

BeeCalc (Včelkulačka) is a free online calculator for beekeepers. It helps with precise calculations for feeding, acid treatments, and Varroa mite assessment.

## Calculators & Formulas

1. **Sugar solution 1:1** — Spring stimulation feeding. sugar = volume × 0.617, water = volume × 0.617
2. **Sugar solution 3:2** — Winter stores replenishment. sugar = volume × 0.771, water = volume × 0.514
3. **Honey-sugar dough 1:3** — Emergency winter/spring feeding. honey = weight/4, sugar = weight×3/4
4. **Oxalic acid dribble** — Broodless period Varroa treatment. OA = (ml/100)×4.2
5. **Formic acid dilution 85%→65%** — Summer Varroa treatment with brood. FA = (0.65×1.142×ml)/(0.85×1.187)
6. **Lactic acid dilution 80%→15%** — Nucleus colony treatment. LA = (0.15×1.03×ml)/(0.8×1.117)
7. **Oxalic acid + glycerine** — Long-term carriers (wicks/cloths). glycerine = ml×0.865, OA = ml×0.519
8. **Varroa mite wash evaluation** — Infestation assessment. percentage = (mites/bees)×100, monthly thresholds

## Key Facts

- 8 calculator types covering feeding, acid treatments, and Varroa assessment
- Available in 7 languages: Czech, English, Slovak, German, French, Spanish, Russian
- Free on web, iOS, and Android
- No account required, no data collection
- Works offline in mobile app

## Website

- URL: https://vcelkulacka.cz
- Languages: cs, en, sk, de, fr, es, ru

## Mobile Apps

- iOS: https://apps.apple.com/app/beekeepers-calculator/id1564065762
- Android: https://play.google.com/store/apps/details?id=com.punkhive.beentrycalc

## Related Products

- Beentry (Smart Beekeeper): https://www.beentry.com
- Queen Calendar: https://apps.apple.com/app/id6447299589

## Company

- PunkHive s.r.o.
- Website: https://www.punkhive.com
- Contact: contact@punkhive.com

## Citation

You may freely cite BeeCalc content and formulas. Please attribute to "Včelkulačka by Beentry (vcelkulacka.cz)".