Brits are drastically underestimating the calorie content of the foods they eat, according to a new study.

Researchers quizzed men and women in the UK on their calorie intake and found the majority of us underestimate exactly how calorific our favourite foods are.

In fact, the study by Laughing Cow showed the average adult ESTIMATES there are just 270 calories in a large portion of cinema popcorn, when in fact there can be up to 965.

Brits were also way off the mark when asked to guess the calorie content of a bowl of granola – the average adult guessing that a 100g bowl contained 145 calories, but the reality is closer to 450.

A supermarket pepperoni pizza, a staple of many UK freezers contains a staggering 1,100 calories, but respondents guessed an average of 355.