QUICK ANSWER
How many calories are in low-sodium tomato soup?
For tomato soup, the locked low-sodium tomato soup prepared with water record provides 30 kcal per 100 g; use only a matching state and source-held weight.
30 kcal / 100 gNutrition values describe a reference food state, not every individual item. Variety, water content, preparation and portion weight can change the estimate.
THE NUMBERS
Low-sodium tomato soup nutrition facts per 100 g
The values below use the reference state shown at the top of this page. Keeping one gram basis makes it easier to compare foods before translating the values to the portion you actually ate.
- Calories
- 30 kcal
- Protein
- 0.79 g
- Carbohydrate
- 6.57 g
- Fat
- 0.28 g
- Fibre
- 0.6 g
- Sodium
- 33 mg
- Potassium
- 112 mg
- Magnesium
- 7 mg
Source: USDA FoodData Central SR Legacy record 171591. Values may be rounded for readability.
SERVING SIZE
Calories by portion and serving weight
Words such as “small,” “medium,” “half” and “one piece” are convenient but imprecise. Grams make the estimate reproducible, particularly when natural foods vary in size.
MACROS
Carbohydrate, protein and fat explained
Protein
0.79 g per 100 g. From Soup, tomato, low sodium, with water.
Carbohydrate
6.57 g per 100 g. From Soup, tomato, low sodium, with water.
Fat
0.28 g per 100 g. From Soup, tomato, low sodium, with water.
MORE THAN CALORIES
Fibre, vitamins and minerals
One food does not need to provide every nutrient. These are the characteristics most useful for understanding where low-sodium tomato soup fits in a varied eating pattern.
Sodium
33 mg per 100 g in the selected USDA record.
Potassium
112 mg per 100 g in the selected USDA record.
Magnesium
7 mg per 100 g in the selected USDA record.
Phosphorus
14 mg per 100 g in the selected USDA record.
FOOD STATE MATTERS
How preparation changes the nutrition estimate
A reliable calorie entry should describe the food you actually ate—not merely a food with a similar name.
low-sodium tomato soup prepared with water
Selected nutrition reference.
condensed tomato soup
Use its own matching record or product label.
tomato sauce
Keep this state separate from the selected reference.
cream of tomato soup
Use the complete product label or recipe.
PRACTICAL CONTEXT
How low-sodium tomato soup can fit different goals
There is no universal “good” or “bad” food. Portion, frequency, the rest of the meal, preferences and individual health needs all matter.
Portion basis
The page scales only source-held weights from 30 kcal per 100 g.
Fibre check
The selected record lists 0.6 g fibre per 100 g.
Protein check
The selected record lists 0.79 g protein per 100 g.
Best logging move
Match low-sodium tomato soup prepared with water exactly and keep condensed tomato soup separate.
QUALITY & SAFETY
How to choose, store and prepare it
Store
Store the unopened product according to package directions.
After opening or cutting
After opening, follow the package directions and keep the container and closure clean.
Prepare
Use clean utensils and prevent cross-contamination during preparation.
Safety boundary
This page represents low-sodium tomato soup prepared with water; the nutrient record does not establish storage duration or clinical advice.
PHOTO LOGGING
How to log low-sodium tomato soup more accurately
A food photo can suggest the ingredient, but it cannot always reveal exact weight, hidden oil or preparation details. These checks turn an image guess into a better estimate.
- 01
Match the exact reference state: Soup, tomato, low sodium, with water.
- 02
Use edible grams. Every named weight is held by the selected local USDA record. The 100 g entry is the source's nutrient basis; no household portion was invented.
- 03
Log oil, sauce, sweetener, salt and recipe ingredients separately.
- 04
Use a separate record when preparation changes the food state.
COMMON QUESTIONS
Low-sodium tomato soup calorie and nutrition questions
How many calories are in 100 g of tomato soup?
30 kcal in the locked Soup, tomato, low sodium, with water record.
Which state does this tomato soup page use?
Soup, tomato, low sodium, with water. State and processing are part of the answer.
How much fibre is in tomato soup?
0.6 g per 100 g in the selected record.
Is condensed tomato soup included?
No. condensed tomato soup needs its own matching record or product label.
Where do the portion weights come from?
Named weights come from the selected local USDA record; the 100 g entry is the source nutrient basis.
KEEP EXPLORING
Related food guides
SOURCES & METHOD
Where these numbers come from
Soup, tomato, low sodium, with water, per 100 g edible portion. Numeric nutrition and named portion claims use the locked local USDA record. No household portion, search demand, storage duration, clinical effect or medical advice is inferred.
Open USDA FoodData Central SR Legacy record 171591 ↗Page reviewed 26 August 2026. We show the food state, gram basis and source record so readers can check the estimate instead of treating one number as universally exact.