Calories for Weight-Loss: How Many do you Need per Day?

Let me be honest with you from the start: I don’t count calories. I never have, and I don’t plan to start.

Not because the numbers don’t matter — they do, in the sense that energy balance is real and physics doesn’t care about your feelings. But because in my experience, obsessively tracking every calorie is stressful, unsustainable, and often misses the point entirely. You can eat 1,500 calories of processed food and feel terrible. You can eat 1,800 calories of whole, nourishing food and feel extraordinary. The number alone tells you very little.

That said — I do think there’s real value in spending a few weeks understanding your portions. Not permanently. Not obsessively. But as a one-time exercise in awareness that genuinely changes how you eat.

Here’s what I mean. I make my own granola — whole oats, puffed quinoa, seeds, a drizzle of honey. It’s wholesome and nourishing, and I was always generous with it in my bowl. Then one morning I actually weighed it. I realised I was starting the day with a very high carbohydrate load that left almost no room for the rest of the day’s meals. Just seeing that number once was enough to shift my habit permanently. I now put less granola and oats in my bowl and fill the rest with seeds, berries, and fresh fruit — more volume, more micronutrients, better balance.

That’s the approach I’d recommend. Use the calculator below to understand your baseline. Spend a week or two weighing your key staples — oats, granola, grains, nuts. Then let whole food eating and intermittent fasting do the rest of the work, without the daily tracking.

What is your Estimated Energy Requirement?

Your Estimated Energy Requirement (EER) is the amount of calories your body needs each day to maintain its current weight. It’s based on your gender, age, height, weight, and — most importantly — your activity level. The difference between sedentary and active can be 400–600 calories per day before you’ve changed a single thing about what you eat.

The Dietary Reference Intake (DRI) framework uses these factors to calculate EER — a useful baseline for anyone, wherever you live.

What I recommend

Use the calculator to find your number. Then spend one to two weeks weighing your most common meals — particularly breakfast staples like oats and granola — to calibrate your eye. Once you know roughly what a portion looks like, you don’t need to weigh again. That awareness stays with you.

Understanding where you are is the first and most important step towards sustainable weight loss. If you’re not owning your health and wellbeing, who is?

The Eat Healthier in 21 Days Challenge is your structured guide to putting this into practice — combining whole food eating with intermittent fasting, 200+ calorie-labelled recipes, and a day-by-day plan that takes the guesswork out completely.

Calculate your daily calorie needs

Type in your parameters below and see how much energy you need to either maintain your current weight or lose weight at a mild, moderate, or more significant pace.

. .

Let’s get started. Small changes, done consistently, add up to something real.