Getting started

How to start counting calories: the first week

Many people start counting calories together with a strict diet – and give up after a week. The opposite works better: learn to log first, and only then change something.

Updated 26 October 2026 · 6 min read

In short

  • Don't change what you eat in week one – just log.
  • Learn three ways to log: barcode, photo, description.
  • Save meals you eat often – future logging gets fast.
  • After 7 days, look at the average, not single days.

The 7-day plan

Day 1: setup

Fill in your profile and weigh yourself in the morning after the toilet. Don't worry about a goal yet – week one is about finding out how you eat now.

Days 2–3: log everything as it comes

Breakfast, lunch, dinner, drinks and snacks. Try every method: barcode for packaged food, photo for a plate, a short description for simple meals. Don't aim for perfection.

Day 4: fats and drinks

Focus on the two most common gaps: measure oil and butter with a spoon, log drinks right away.

Day 5: save your staples

The breakfast you always have, your favourite yoghurt, coffee with milk – save them. From tomorrow they take one tap.

Days 6–7: the weekend counts

Log the weekend too, even if it is different. It matters most for your average.

Beginner mistakes

  • A strict diet from day one – you have nothing to compare with yet and burn out fast.
  • Logging in the evening from memory – you forget half the small things.
  • Chasing perfection – an estimate beats nothing; consistency matters more than gram precision.
  • Judging by one day on the scale – water can move the number by a kilo or more.

After the first week

Look at your average daily intake over the 7 days. That is your baseline. Only now does it make sense to set a goal and make small changes – for example less oil or a different drink – and watch how the trend changes over the following weeks.

If you have health conditions, are pregnant or breastfeeding, discuss your goal with a doctor or registered dietitian.

Frequently asked questions

Should I start a diet right away when I begin counting calories?

It is not necessary. In week one it is useful just to log and see how you eat now. Then make small changes.

How long does food logging take each day?

A few minutes per meal at first. Once you save the meals you eat often, most of the day takes one tap.

Do I have to weigh every meal?

No. Pack weights, measuring fats with a spoon and saved portions help. Consistency matters more than gram precision.

Sources

  1. Burke et al. (2011), J Am Diet Assoc – self-monitoring in weight loss (systematic review)
  2. Bhutani et al. (2017), Physiol Rep – composition of two-week weight change

This guide is general information for healthy adults, not medical advice. If you are pregnant, breastfeeding, have or have had an eating disorder, or need a therapeutic diet, talk to a doctor or registered dietitian.