Meal Calculator

What is a meal calculator?

A meal calculator works out the nutrition of a complete meal by combining the figures for every food in it, scaled to the amount you actually used.

That is a different job from looking foods up one at a time. Nobody eats 100g of chicken in isolation — they eat it with rice, a sauce and some oil, and the question worth answering is what the plate adds up to.

Depending on the foods you add, you will see calories, protein, carbohydrate, sugars, fat, saturated fat, fibre, salt, and a full vitamin and mineral breakdown against UK reference intakes.

Why look past the calories?

Calories measure energy. They say nothing about quality, and two meals of the same size can be completely different propositions.

Take two 600-calorie lunches. One might carry 45g of protein, 9g of fibre, a decent spread of micronutrients and very little salt. The other might have 12g of protein, 2g of fibre, most of a day's salt allowance and 30g of sugar.

Both "cost" the same against a daily target. They will not leave you feeling the same at four o'clock, and over months they are not doing the same thing to your health. That gap is the entire reason this calculator shows more than one number.

What the calculator shows

Calories

Total energy for the meal as built. Change any weight and everything updates immediately.

Protein, carbohydrate and fat

The three macronutrients, per food and as a total. The per-food table is often the more useful half — it shows which ingredient is actually driving the number.

Fibre, sugars, saturated fat and salt

The rest of a standard nutrition label. Fibre is the one most people are short of; salt and saturated fat are the two most often underestimated, because they arrive through sauces and cheese rather than through anything that feels like a decision.

Vitamins and minerals

Twelve vitamins (A, C, D, E, K, B1, B2, B3, B5, B6, folate and B12) and nine minerals (calcium, iron, magnesium, phosphorus, potassium, zinc, copper, manganese and selenium), each shown as an amount and as a percentage of the UK adult reference nutrient intake.

Where only some of your foods have data for a nutrient, the row says so with a small count. A total built from three foods out of five is not the same claim as a complete one, and a calculator that hides that difference is quietly misleading you.

What makes a balanced meal?

Needs differ, but most balanced meals contain the same four things:

• A protein source — chicken, fish, eggs, tofu, Greek yoghurt, beans or lentils.
• Fibre-rich carbohydrate — potatoes, wholegrain rice, oats, wholemeal bread or pasta.
• Vegetables or fruit — ideally more than one colour, for the range of micronutrients as much as the fibre.
• Some healthy fat — olive oil, avocado, nuts or seeds, in a measured amount.

Build a typical meal in the calculator and the gaps tend to be obvious before you have read a single guideline: the fibre figure sits at 3g, or the protein comes out at 14g, or the salt is most of a day in one plate.

How accurate is it?

The figures come from standard per-100g values for common foods, drawn from USDA FoodData Central and Open Food Facts, scaled to the weight you entered. That makes them a good estimate and not a laboratory analysis.

Accuracy depends mostly on things you control:

• Whether the weights entered match what you actually ate
• Whether you picked the closest food — lean mince and standard mince are not the same entry
• Whether cooking oil, butter, dressings and sauces were included
• Whether the weight is raw or cooked, which matters a great deal for rice, pasta and meat
• Brand variation, which no generic database can capture

Use it to compare meals and spot gaps, not to chase a figure to the decimal place.

Tips for a more useful result

• Weigh rather than estimate, at least at first. A "handful" of nuts ranges from 20g to 60g, which is a 250-calorie spread.
• Add the oil. A tablespoon is around 120 calories and it is the single most commonly omitted ingredient.
• Match raw or cooked to what you weighed. Rice roughly triples in weight as it absorbs water; meat loses weight as it loses moisture.
• Include what goes on top — cheese, dressing, mayonnaise, the bread on the side.
• Build the meal you actually eat, not the recipe as written. If you always have more than the stated portion, enter more.

Common nutrition myths

"Only calories matter"

Calories decide body weight. Protein, fibre and micronutrients decide how a meal feels, how long it holds you, and what it contributes beyond energy. Both things are true at once.

"Healthy food is low in calories"

Nuts, olive oil, avocado, oily fish and seeds are all calorie-dense and all worth eating. Energy density and nutritional value are unrelated.

"Carbohydrates are unhealthy"

Carbohydrate is the body's main fuel. Fibre-rich, minimally processed sources belong in most balanced diets; the case against carbohydrate is really a case against a handful of specific foods.

"High-protein meals are just for athletes"

Protein supports muscle maintenance, healthy ageing and fullness at every level of activity. It matters most, not least, when you are eating less.

From one meal to every meal

Analysing a single meal is useful once. The value compounds when it becomes how you eat.

Mealiv plans meals around your calorie and protein targets, tracks what you log automatically, watches fibre and micronutrients over weeks rather than plates, turns plans into shopping lists, and adjusts as your goals change.

Set your targets first with the TDEE calculator and the macro calculator, then use this page to check whether the meals in front of you actually meet them.