David Holmes, a psychology lecturer at Manchester Metropolitan University, England, devised the formula.
He asked about 2000 women across Britain to assess their bottoms using a simple points scale.
For example, those who believed theirs resembled a trodden doughnut scored just one point for shape, whereas those with a small peach scored the maximum five.
The perfect female derriere has firmness to the touch and a resilience that prevents undue wobble or bounce, yet looks soft with flawless skin," Dr Holmes said.
"Slender thighs and a hip-to-waist ratio of 0.7 will frame the perfect bum, well perfectly."
Dr Holmes said that Kylie Minogue, whose celebrated bottom relaunched her career with the help of a pair of hotpants, would almost certainly score a perfect 80.
"Kylie would score amazingly well on sphericality and symmetry. Her bottom is pretty much perfect in these areas, more so than the likes of Charlotte Church or Jennifer Lopez, who have more curvy posteriors," he said.
So now you know.
Via Lynn Harris.