Fibs about their consumption of sweets, cheese, bread, chips and burgers are also among the top ten most common falsehoods, along with wine and beer.
"I never touch fast food" is another popular line, trotted out even by those who enjoy clandestine visits to McDonald's or KFC when no one's looking.
And "I didn't touch any of the biscuits" is a regular claim, despite the evidence of an empty packet in the kitchen bin.
For drinking, the "I only had one glass" line is frequently served up after polishing off an entire bottle of wine. And at weddings or parties the"I only had a drink because we were toasting an occasion" claim is often used, when, in fact, the 'toast' went on all night.
Other popular lines include "I just finished off the kids' leftovers' without mentioning quite how much food the children left, and "I only had a salad so that's healthy", choosing to ignore the fatty dressings and extras.
In all, the survey of 3,000 Britons, commissioned by Timex, found that the average woman tells 474 of these lies every year.
Dr Cassandra Maximenko, a chiropractor and athlete, said that by lying to others, women were also lying to themselves and could easily see their weight creep up or damage their health.
She added: "This study proves we live in a nation of denial where image takes a higher priority than honesty and no one wants to be seen eating food they shouldn't."
- DAILY MAIL