Experts are advising Kiwis to become more conscious of their food wastage with new research showing more than 70 per cent of New Zealand households discard uneaten food every week.

The study of 1,000 New Zealanders shows three quarters of the population discard food to the value of $25 every week, which for a household on a budget of $150 represents around a sixth of their total food spend for the week.

Aggregating the total amount of food thrown away across all households in New Zealand would represent $3 billion in food wastage each year.

Almost three quarters of New Zealanders have felt guilty about throwing away food.

This emotional response was noticeably higher in females (79%) and young adults (85%).

The research shows how we classify food waste varies between individuals however eight in 10 (80%) of respondents define it as throwing out some form of uneaten food - including leftover meals, uncooked food or discarding takeaways.

Leftover cooked meals are the most likely food waste making up 30 per cent of responses, with uneaten fruit and vegetables next most common on 27 per cent and baked goods such as bread-making up a tenth of food waste.

Unsurprisingly, single-person households were the most likely group to have leftover bread or baked goods, potentially due to the lack of small portion sizes available from food retailers such as supermarkets.

A lack of meal planning is given as the most common reason for having leftover food - with a quarter of households admitting this type of waste. This lack of meal planning was dominant in single-person households where almost half said this was the reason.

Eating out more than planned or purchasing takeaways catches out a sixth of Kiwis while purchasing excess quantities at the supermarket is the next most likely reason for a seventh of respondents.

The HelloFresh research also shows 30 per cent of Kiwi households have made an effort to reduce food waste as a result of COVID.

Dietitian Hannah Gilbert, director of culinary innovation and operations at HelloFresh says the meal kit model has inherent advantages in meal planning and reducing food waste at home - compared to traditional grocery shopping.

'By having weekly recipes planned and ingredients pre-portioned and delivered to our customers, it means people are less likely to over shop or look to takeaway options during the week.”

'The exact portion sizes are then provided in each meal kit which means families will also be left with basically zero food waste,” she says.

Tom Rutledge, HelloFresh NZ CEO, says the aspirational goal of reducing food waste is fundamental to their business model.

He says they also work with suppliers throughout the country to carefully forecast demand which means the right quantities of fresh produce can be growing in the fields one day, and packed into meal kits for delivery to customers the next day.

'At a time when so many are struggling to put food on their table, there is more reason than ever to be conscious about over-purchasing food.

'The feedback from our customer base is that the opportunity to reduce weekly food waste is a key driver of purchase of our meal kits and we are also immensely proud that we can support essential community organisations such as KiwiHarvest through a consistent supply of fresh produce."