Dempsey-Liberty Mutual (De)palletising Energy Expenditure Calculator

Population          
Body weight kg
Box size
Box weight kg
Frequency /min
Task

VO2 (ml/min)

Kcal/min

Kcal/day

Task acceptable?

Metabolic equations were developed by Liberty Mutual to predict oxygen consumption for individual and combination materials handling tasks. The calculated expenditure limit is expressed as the rate of oxygen consumption per minute (VO2).

The calculator on this website converts the VO2 value to kcal per minute. According to Mital et al. (1993), the threshold limit for a male population is 4 kcal per minute and for a female population 3 kcal per minute.

(De)palletising task:
  •  Distance between pallet and roller conveyor: 1 m
  •  Height of roller conveyor: 75 cm

Source:
Oxygen Consumption Prediction Models for Individual and Combination Materials Handling Tasks, published by Dempsey, et al., 2008.

A Guide to Manual Materials Handling, published by Mital, et al., 1993.