Food Loss and Waste Calculator

Food loss refers to the decrease in quantity or quality of food at production, post-harvest, and processing stages of the supply chain — often due to inadequate infrastructure or practices. Food waste refers to food that is discarded at the retail and consumer level, typically due to behavior, over-purchasing, or expiry. Both contribute to the same broader problem of edible food not reaching people.

The economic value lost is calculated by multiplying the total quantity of food lost across all supply chain stages by the average market price per unit you enter. This gives a monetary estimate of the resources wasted. The actual financial impact may be higher when accounting for labor, water, energy, and transportation embedded in the lost food.

The calculator applies general greenhouse gas emission factors (in kg CO₂ equivalent per kg of food wasted) based on common estimates for each food category. For example, meat and dairy typically carry much higher emission factors than fruits and vegetables. These are approximate values for awareness purposes; more precise life-cycle assessments would require detailed supply chain data.

It varies significantly by food type and region. In high-income countries, the largest losses tend to occur at the consumer and retail stages. In low- and middle-income countries, post-harvest handling and storage often cause the greatest losses due to limited refrigeration and infrastructure. This calculator helps you compare loss at each stage so you can identify where to focus reduction efforts.

The meals lost figure is estimated by dividing the total food lost (in kg) by an average serving size of approximately 0.5 kg per meal. This gives a tangible sense of the social impact of food waste in terms of how many people could have been fed. It is a simplified metric for illustrative purposes.

Yes. Enter the actual quantities your facility handles and your measured or estimated loss rates at each stage to get a facility-specific snapshot. For a more rigorous assessment aligned with international standards, consider using the full FLW Standard methodology from the Food Loss and Waste Protocol, which provides detailed guidance on data collection and reporting.

Reducing food loss and waste addresses food security, environmental sustainability, and economic efficiency simultaneously. Food that is lost or wasted represents wasted water, land, energy, and labor. The FAO estimates that roughly one-third of all food produced globally is lost or wasted, contributing around 8–10% of global greenhouse gas emissions.

Each stage's loss percentage is applied to the quantity of food remaining after the previous stage — not to the original starting quantity. This cascading effect means that even seemingly small loss rates at multiple stages can add up to a significant total loss by the time food reaches consumers. The table in this calculator shows exactly how quantity reduces at each step.