Just about everybody that calculates the number of calories they need to burn to lose a certain amount of weight does so in error. In hindsight, the reason why will seem obvious. But it's just not something most people think about.
We don't want to make it sound like using our calculator is more complex than it actually is. If you want to calculate how many calories you will burn jogging for an hour, just make the calculation. You will get your answer, the total number of calories you will burn jogging for an hour.
However, let's say that you want to lose a certain amount of weight and you plan to do it by walking your dog when you get home from work instead of just sitting and watching TV. You will want to calculate how many calories you will burn walking your dog, but that will not equal the number of calories you will lose.
The reason for the discrepancy is that you need to take into account the number of calories you would have burned sitting watching TV. Sitting burns one-third the number of calories that walking a dog burns, so you will only be losing two-thirds of the number of calories you calculate for walking a dog.
To calculate the actual number of calories you will lose each day, subtract the number of calories burned by the old activity from the number of calories burned by the new activity.
If you weigh 185 pounds you will now be burning 252 calories during the same hour each day in which you were previously burning 84 calories, so you will have a net loss of 168 calories per day.
With a daily calorie loss of 168 calories, you can now use the Weight Loss Calculator to calculate either how much time it will take to lose a certain amount of weight, or how much weight you will lose over a certain amount of time.
Calculations made with the Activity Calculator reflect the total number of calories burned during the period of time calculated. Therefore when calculating how many calories you burn, do not add your BMR or RMR.
As you lose weight, activity becomes easier and you burn fewer calories performing the same activities. Therefore if you are planning on losing a great amount of weight, you may want to make adjustments as you progress. You can eat less, exercise more, or simply recalculate the date you will reach your goal.
If you weighed 185 pounds when you began and you lost 20 pounds, you would now burn 27 fewer calories each day walking your dog.
But there is good news, too. You will enjoy improved health and appearance, and your BMI (Body Mass Index) will have dropped from Overweight to Normal Weight. And the same will be true for your dog.