Calorie to Exercise Calculator
Why Write a Calorie to Exercise Calculator?
The other day I was somewhere around 60 calories over my calorie goal. Not much, really, and maybe within the margin of error considering how inaccurate my recording can be.
But I thought to myself What exercise - and for how long - could I do to burn that 60 calories? With sites and apps like My Fitness Pal I could select an exercise, and then increase or decrease the time until I found how long it would take to burn 60 calories.
But not only is that time-consuming - it’s only looking at one exercise at a time. Which, I suppose, just means it would even be more time consuming to look at several different exercises until I found one that I could do in a certain amount of time.
I’m a software engineer (aka programmer) by trade, so I decided I’d do a bit of research. It turns out that each exercise has a number associated with it called a metabolic equivalent of task, or MET. If you know an exercise’s MET, plus a few other bits of information, you can figure out how many calories an exercise burns.
Here’s the equation:
METs × 3.5 × body weight in kilograms / 200 = Kcal/min
Keep in mind that kilocalories are the same as capital-C Calories.
Solving the equation for minutes is straight forward:
min = Kcal / (METs × 3.5 × body weight in kilograms / 200)
So all I need to know is how many calories I want to burn, and how much I weigh, and I can figure out how long I have to exercise for each exercise to burn that many calories. And with exercises that involve a speed - such as running or walking - I can also figure out how far I need to go.
I’m unsure if My Fitness Pal or similar apps use METs, but it would make sense if they did. Why reinvent the wheel?