Orchard and Vineyard

Predicting Wine Grape Crops - Metric

This calculator can help estimate the yield in tons per hectare.

The harvest cluster weight method is based on the number of producing vines per hectare, the average number of clusters per vine, and the average cluster weight at harvest from previous years to predict the yield in tons per hectare for the current season.

The lag phase cluster weight method is based on the number of producing vines per hectare, the average number of clusters per vine, and the average cluster weight at the lag phase state of the grape with the use of a multiplier to predict the yield in tons per hectare for the current season. Cluster weights will double from lag phase to harvest time. The multiplier in this calculator is set at 2 but this number can vary depending on various factors.

Sampling method and amounts of samples taken to obtain averages is beyond the scope of this calculator. Accuracy counts!

Estimate Grape Yield Using Lag-Phase or Harvest Cluster Weight Method

The Calculator

Select your method
The multiplier in this calculator is set at 2 but can be changed. It only comes in play when using the lag phase method
Row spacing in metres
Vine spacing in metres. 3 and 4 will determine number of vines per hectare
Enter the number of non bearing or missing vines
Enter the average amount of clusters per vine
Enter the average weight of these clusters in grams

The Results

The result of the calculation will be the yield in tons per hectare of the grape crop.

Vineyard Planting Density

Orchard Planting

Tree Planting Calculator for Odd Shapes