Young Australians love to dine out but dietitians want their foodie love to play out in the home kitchen too as a way of maintaining a healthy weight.

Australia's younger generation of foodies need to get out of the cafe and back in the kitchen if they want to keep their weight in check.

A survey commissioned by the Dietitians Association of Australia has found the nation's cafe culture is entrenched in young adults.

Three quarters of those aged 18-34 eat out or order take-away food at least once a week, and 28 per cent dine out or order in at least three times a week.

That's significantly more than their parents.

According to the survey, 43 per cent of 50-64-year-olds eat out at least once a week and just 10 per cent dine out regularly.

While eating out is convenient it can be bad for the waistline because of the large portion sizes.

Research shows that people who cook at home eat smaller portions and take in fewer kilojoules, as well as less saturated fat, salt and sugar, resulting in a healthier weight.

DAA spokesman Themis Chryssidis says foodies need to discover the joys of home cooking.

"Why not impress your friends and family by trying your hand at recreating your favourite cafe or restaurant dish at home?"Mr Chryssidis asked.

"Eating is just as much about enjoying food as it is about nourishing our bodies, so it's great that young Australians are a generation of foodies. We want this love of food to play out in the home kitchen too," he said.