Tofu calories: nutrition, weighed portions and preparation

How many calories does tofu contain?

For the numbers in this guide, tofu means “Tofu, raw, firm, prepared with calcium sulfate” (USDA FoodData Central 172475). It contains 144 kcal per 100 g edible portion. This reference is firm tofu prepared with calcium sulfate. Silken tofu, other firm products and fried tofu may have different water and fat content. Keeping that definition attached to the number prevents a plain ingredient from being mistaken for a prepared meal.

A weighed 150 g portion provides approximately 216 kcal: 150 × 144 ÷ 100. A smaller 75 g portion gives 108 kcal, while 225 g gives 324 kcal. These are calculated amounts of the named food, not claims about the weight of a standard piece, cup or restaurant serving.

What comes with those calories?

The same 100 g reference provides 17.3 g protein, 2.8 g total carbohydrate, 8.7 g fat and 2.3 g fiber. For the illustrated 150 g portion, those amounts become 25.9 g protein, 4.2 g carbohydrate, 13.1 g fat and 3.5 g fiber. Calories and individual nutrients describe different parts of the food, so keep all of them on the same portion basis when reading the table.

Firm tofu made with calcium sulfate is a particular preparation, not a value for every tofu. Water content differs between firm and silken products, and pressed or fried preparations need special attention.

Weighing tofu without guessing a serving

Drain consistently before weighing. If the package gives a specific serving basis, use that label for the product you bought. A useful kitchen sequence is to place an empty bowl on the scale, tare it to zero, add the edible tofu, and note the grams before combining it with other foods. If you serve only part of that amount, record the part eaten. Leftovers matter because the amount available and the amount consumed are different quantities.

Drain the block consistently before weighing it. If pressing removes liquid, use a product or recipe basis that remains sensible for the amount you actually eat instead of mixing a drained portion with an unrelated entry.

What changes in a complete dish?

A tofu stir-fry includes sauce and cooking fat as well as tofu. A photo may show crisp edges, but it cannot establish how much oil was absorbed or which brand of tofu was used.

Pressing removes water, while frying may add oil. Track the cooked preparation and sauce instead of assuming all tofu entries match.

For an explicit ingredient example, 150 g of the named tofu plus 5 g olive oil gives approximately 260.2 kcal. The tofu contributes 216 kcal and the oil contributes 44.2 kcal. This is an illustrative two-ingredient calculation, not a tested recipe or a claim that tofu is always served with oil.

How tofu compares with prepared edamame

The comparison food is “Edamame, frozen, prepared” (FDC 168411), which contains 121 kcal per 100 g. At equal 150 g weights, the tofu reference supplies 216 kcal and prepared edamame supplies 181.5 kcal: a difference of 34.5 kcal. That is a calculation for these records, not a universal ranking of foods or an instruction to exchange equal portions.

Compare the nutrients as well as the energy in the named records below. A food with a different water content, texture or role in the meal may not be a direct substitute. For a real swap, compare the amounts you plan to eat and include the rest of the plate, rather than choosing solely from the lower number in a 100 g table.

Recording the meal in BiteCal

In BiteCal, start with a photo of the tofu portion and the rest of the meal. Review the proposed food name, preparation, amount and visible additions before saving the calorie and macro estimate. If you already know the gram weight, use it as a check rather than accepting a visually plausible portion. A photo cannot establish a hidden oil quantity or replace the identity of a packaged product.

The nutrient figures come from USDA SR Legacy, final release April 2018. They provide a reproducible reference for the named food rather than a laboratory result for your own serving. Use the current package or restaurant information when it describes your exact product more closely. Rounding explains small differences between displayed portions; calculations here use the retained unrounded reference values.

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