How to log food accurately

Accuracy in food logging isn't about the scale. It's about not missing things. The oil in the pan, the handful from the packet, the two biscuits with coffee — those are where a day goes wrong, not the difference between a 32 g and a 38 g slice of bread.

The four places tracking actually goes wrong

1. Cooking fat

A tablespoon of olive oil is about 120 calories, and most people pour two without thinking. Over a week that's a day's worth of food, entirely invisible. If you change one habit, make it this: log the oil.

2. The things eaten standing up

Food eaten from the packet, off someone else's plate, or while cooking rarely gets logged. It isn't dishonesty — it doesn't feel like a meal. Log it in the moment or it's gone.

3. Evening catch-up

Trying to reconstruct a day at 10pm means relying on memory for portion sizes you never registered. Everything shrinks in recall. Logging as you go removes an entire category of error.

4. Round numbers that were never measured

"100 g" is the default in most apps and it's almost always wrong. 100 g of peanut butter is six tablespoons. 100 g of cashews is 600 calories. If you didn't choose the number, don't trust it — see what portions actually weigh.

Be roughly right rather than precisely wrong

Under-reporting in self-tracking is well documented, typically in the range of 20–30% of total intake. Almost none of that comes from imprecise weighing. It comes from omissions.

Which means the habit that matters is completeness, not precision. A day where every item is logged to ±15% is far more useful than a day where breakfast is weighed to the gram and dinner is skipped because you were out.

A minute a day, in practice

• Log before you eat, not after. The portion becomes a decision rather than a confession, and there's no recall error.
• Scan the packet. Anything with a barcode is two taps and the numbers are the manufacturer's, not an average.
• Photograph the plate when it's a home-cooked mix you'd otherwise skip. An AI estimate of a curry beats no curry.
• Save what repeats. Most people eat the same eight breakfasts. Log it once properly, then it's one tap forever.
• Estimate restaurant meals and move on. You cannot weigh them. A rough entry keeps the week honest.

Where weighing still earns its place

For a fortnight, weigh the dense things — oil, butter, nuts, nut butter, cheese, granola. Not forever: just long enough to learn what your own tablespoon and your own handful look like. After that your eye is calibrated and the scale can go back in the drawer.

Everything else — bread, eggs, fruit, packaged snacks — count in pieces. That's how you eat them and how you remember them.

Why this shapes how NutriMacro works

Logging fails when it's slow, so the app is built to make the common case fast: scan a barcode and it opens at one slice or one biscuit rather than 100 g, photograph a plate and it estimates each item, and the foods you eat repeatedly are one tap from your recent list.

It also tracks workouts, sleep and recovery alongside food, because a calorie number on its own doesn't explain a week. Training hard and sleeping badly changes what those calories do.

Common questions

How accurate does it really need to be?

Within about 10% is plenty for weight change. Consistency matters more than precision: the same method every day makes the trend readable, even if every number is slightly off.

What if I can't find the food?

Log the closest match rather than nothing. A similar dish at a similar portion is far more useful to your weekly total than a gap.

Should I log a day I've gone over?

Especially then. A tracked bad day is data; an untracked one is a hole, and holes are what make people conclude tracking "doesn't work".

Start with NutriMacro — or read barcode, photo or search: the fastest way to log each meal.