Food goes missing at every step between the field and the plate. Food loss happens after harvest or slaughter and before food reaches the shop: on farms, in storage, during transport and in processing. FAO estimates that 13.3% of the world's food was lost this way in 2023, slightly more than in 2015. Food waste happens in shops, restaurants, canteens and homes: about 1.05 billion tonnes in 2022, almost one-fifth of all food available to consumers, and 60% of it in households. Taken together, the IPCC assesses that 25 to 30% of all food produced is lost or wasted.
Losses after harvest are highest in sub-Saharan Africa and in the least developed countries, and for small-scale farmers without cooling or storage, spoiled produce means lost income. Waste in homes, by contrast, is found at similar levels in rich and middle-income countries. The consequences are shared: food loss and waste contributed 8 to 10% of human-caused greenhouse gas emissions in 2010 to 2016, takes up the equivalent of almost a third of the world's agricultural land and costs more than USD 1 trillion a year. Food that is saved would not automatically reach people who go hungry, but the waste happens while hundreds of millions of people do not have enough to eat.
Food loss and food waste are measured separately
SDG target 12.3 aims, by 2030, to halve per capita global food waste at the retail and consumer levels and to reduce food losses along production and supply chains, including post-harvest losses. Its indicator has two parts, with FAO responsible for losses and UNEP for waste:
Food loss (indicator 12.3.1a)
The share of edible crop and livestock products that leave the supply chain completely after harvest or slaughter and before retail: on the farm, in storage, in transport and in processing. Losses before harvest are not counted, and food that goes to animal feed or industrial uses is not treated as lost. Country figures are built on ten key commodities from five food groups.
Food waste (indicator 12.3.1b)
Food, together with its inedible parts such as bones, rinds and fruit stones, that is removed from the human food supply in retail, food service (restaurants, canteens, schools, hospitals) and households. It counts whatever the destination, from landfill and sewer to compost and anaerobic digestion, and is reported in kilograms per person per year.
Measured or modelled
Few countries report measured losses, so most food loss figures come from an FAO statistical model. For food waste, countries without their own data receive estimates extrapolated from countries that have data, and UNEP's national household estimates carry confidence ratings from very low to high. Only direct national measurement in each sector is robust enough to track change over time.
What the numbers miss
Neither indicator covers food left unharvested in the field, and there are no global loss estimates for fish. Waste figures include inedible parts, so not all of the waste could have been eaten, and differing national methods make many country figures hard to compare.