From slow and tender lovemaking to frisky quickies, the new Sex Calculator gives users the answers they need when it comes to figuring out the calorie-burning potential of their bedroom antics.

Whether your last session was easy like a Sunday morning or fast and furious, the calculator considers a range of variables to present your fat-burning estimate, including gender and build, in addition to the duration of the session and the chosen position.

Sarah Bailey of, the company behind the calculator, commented: “If you’re going to treat this time together like it’s just a work out, your partner may get a bit offended.”

TNT would also advise that you don’t crack the Sex Calculator out immediately afterwards – nothing kills a mood faster than someone shouting, ‘That doggy session just burned 50 calories. Result!’