During the night, our body’s make use of our energy stores to repair damaged cells, build up new muscles, and replenish the body after physical activity, but if you haven’t been doing any physical activity, all the excess calories in your body will simply be stored as fat, leading to weight gain.

Why am I weighing heavier at night?

If you weigh yourself at night, you’re going to weigh more than you actually do, according to Discover Good Nutrition. Weigh yourself first thing the mornings, after your body has had a full night to digest your food. Otherwise, you’ll be seeing higher numbers that don’t correlate to all of your hard work.

Is your true weight morning or night?

For the most accurate weight, weigh yourself first thing in the morning. “[Weighing yourself in the morning is most effective] because you’ve had adequate time to digest and process food (your ‘overnight fast’).

Body weight is a bit lower in the morning, because there’s less food and fluids consumed overnight, and also due to water lost through sweat and breathing, per the American Physiological Society.