The sport operates by a strict weight code which at present means car and driver, in overalls, should be no more than 642 kilograms.
With the introduction of new powertrain regulations from 2014, motor sport's world governing body the FIA, has increased the weight limit to 692kg.
The complexity of the new technology, though, with 1.6-litre V6 turbo-charged engines replacing the current 2.4-litre V8s and (ERS) energy recovery systems being introduced alongside KERS (kinetic energy recovery systems), the teams are struggling to hit the new target.
One driver seemingly in trouble is Nico Hulkenberg, with the German on the lookout for a new drive as he will be leaving Sauber at the end of the year, with Lotus his main target.
Weighing in at 78kg, Hulkenberg is understood to be one of the heaviest drivers on the grid, which is scuppering his chances of finding a new team.
Red Bull team principal Christian Horner has confirmed if Hulkenberg had been in contention for the seat to be vacated by Mark Webber, he would have had serious concerns about accommodating the 26-year-old.
At 74kg, Button has revealed he is already on the current limit, and is acutely aware of the difficulties McLaren face next term to ensure he and his car do not breach the rules.
"I've struggled to make the weight limit for the last three years," said Button, speaking ahead of this weekend's Korean Grand Prix.
"I love fitness training, but there is certain training I have to do, and parts of my training I can't do.
"I can't build muscle and I can't eat carbohydrates because I have to be a set weight, and it's going to get worse next year as well.
"We don't know how bad it's going to be, but it's going to be very tricky.
"Every year we start with ballast, and throughout the year, because you add parts to the car, the car puts more weight on.
"Whereas at the start of next year, every team won't have ballast on the car (due to the new rules) and it's going to get worse through the season.
"It does hurt the heavier driver, and it's very unfair to say 'lose weight' because some of us can't lose any more.
"You need to have skin on your bones, and a little bit of muscle to drive a Formula One car, so it is unfair.
"The thing is people don't realise the difference a kilo of weight can make, even if it is to change the balance of a car.
"If you are overweight, it's 30 milliseconds per kilo, so 10 kilos is three tenths (of a second), three and a half tenths per lap."
The simple solution is for the FIA to allow the teams a further 10 kilograms of weight, raising the maximum to 702kg.
"It should be easy for us to stick another 10 kilos of weight on the car, so I don't understand why we can't do that," added Button.
"Maybe it's because we haven't talked about it, we haven't asked for the cars to be heavier.
"I know this might seem funny, but it's not, especially when a driver is very talented because it can make the difference between whether he races or not.
"I can't see a reason why we can't put the weight limit up by 10 kilos. It means half of the grid won't be penalised next season.
"It's one of the easiest things to put right - it could save a driver's career, or make a driver's career.
"It's definitely something worth pushing for."
The suggestion is the ideal weight for a driver for next season be 60-65kg, a notion Hulkenberg has described as "very unrealistic".
Hulkenberg added: "Unfortunately I am what I am - tall and therefore on the heavier side, but not as heavy as some other drivers.
"Maybe in terms of the regulations you have to raise the weight a bit more to make it more fair for different weight levels.
"You can really get an advantage with your weight distribution if you are 10 to 15 kilograms lighter.
"But you need to keep a certain level of muscle and fitness because if you lose more weight it gets to a dangerous point from a health point with all the travelling."