## Gross Weight

The gross weight of a hive is calculated as follows:

- 1. Convert the readings obtained with the BeeWeigh from pounds and ounces to fractional pounds. A conversion table is provided below. For example: 9 pounds and three ounces equals 9.1875 pounds.
- Ounce to Decimal Conversion

Ounce Decimal Ounce Decimal Ounce Decimal Ounce Decimal 1 0.0625 5 0.3125 9 0.5625 13 0.8125 2 0.125 6 0.3750 10 0.6250 14 0.875 3 0.1875 7 0.4375 11 0.6875 15 0.9375 4 0.25 8 0.5 12 0.75 16 1.0 - 2. Add the two readings together.
- 3. Add the above total to two times the BeeWeigh tare weight. Note that this tare weight is unique to each device. See the page on calibration for details.
- 4. Multiply the total of the two readings and the two tare weights by the mechanical advantage factor. Again, this factor is unique to each device and is determined during calibration. The result of the calculation is the gross weight of the hive.

One way to expedite computing the gross weights of colonies is to create a look-up table using a spreadsheet program. It is suggested that the combined total of the BeeWeigh readings be incremented in two ounce increments over the typical gross weight of your hives. A printed copy of the spreadsheet permits quick comparison of gross weights in the bee yard.

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