Portion Size Mistakes That Can Throw Off Your Food Log
A careful food log can still be misleading when the amount entered does not match the amount eaten. A few simple habits can make your portions easier to judge and record.
Confusing a serving with your portion
A serving size is the reference amount shown on a label or in a tracking app. Your portion is the amount you actually eat, so it may be smaller or larger than that reference.

Before logging an item, compare the listed serving with what was on your plate. If you ate more than one serving, adjust the entry rather than recording the label value unchanged.
Switching between cooked and uncooked weights
Foods can gain or lose water during cooking, which changes their weight without neatly changing the energy in the whole amount. Logging a cooked weight against an uncooked database entry, or the other way round, can make the record inaccurate.
Check whether your chosen entry says cooked, raw, dry or prepared. Weigh and log the food in the same state whenever possible, and use a consistent method for recipes you make often.
Estimating foods that are easy to underestimate
A quick pour, scoop or spread can be difficult to judge by sight, especially when the food is added during cooking. Small extras can also disappear from memory by the time you complete your log.
Use a kitchen scale or measuring spoon when visual estimates feel uncertain. You do not need to measure everything forever, but occasional checks can help you learn what your usual portions look like.
Forgetting shared dishes and leftovers
It is easy to log a full recipe as equal portions even when plates were served differently. Returning for another spoonful or leaving some behind can also make the logged amount differ from what you ate.
For a homemade dish, record the ingredients and note the finished weight or divide it according to the portions actually served. Aim for a reasonable, repeatable estimate rather than perfect precision, as the right level of detail depends on the person and their tracking goal.