What is the equation for measuring the total calories somebody has burned?

The Harris-Benedict equation for BMR is For men: (13.75 x w) + (5 x h) - (6.76 x a) + 66 For women : (9.56 x w) + (1.85 x h) - (4.68 x a) + 655 w = weight in kilograms, h = height in cm, a = age