100g Tomato Calories — 18 kcal | Nutrition Calculator

100g of Tomato, raw contains 18 kcal of calories. Free converter with serving tables, volume conversion, raw vs cooked, and FAQs. Data from USDA FoodData Central.

100g Tomato Calories Calculator

100g of Tomato, raw contains 18 kcal of calories. Use the converter above to calculate any weight or volume, or explore the tables below for common serving sizes. All values from USDA FoodData Central.

Result

100g Tomato Calories

18 kcal calories

Computed from 100 g of food and USDA FoodData Central reference.

Reverse Calculation

Calories target to food amount

100 g (3.53 oz, 0.44 cups)

Reverse math uses 18 kcal calories per 100 g from USDA FoodData Central reference.

Tomato Macros by Serving Size

Weight	Calories (kcal)	Protein	Carbohydrates	Fat
10 g	1.8	0.1 g	0.4 g	0 g
25 g	4.5	0.2 g	1 g	0.1 g
50 g	9	0.5 g	2 g	0.1 g
100 g	18	0.9 g	3.9 g	0.2 g
150 g	27	1.4 g	5.9 g	0.3 g
200 g	36	1.8 g	7.8 g	0.4 g
250 g	45	2.3 g	9.8 g	0.5 g

Tomato Macros by Common Serving

Serving	Weight	Calories	Protein	Carbs	Fat
Small portion	75 g	14	0.7 g	2.9 g	0.2 g
Standard serving	100 g	18	0.9 g	3.9 g	0.2 g
Large serving	150 g	27	1.4 g	5.9 g	0.3 g

Tomato Calories Range Around 100g

Weight	Calories	Calories
50 g	9	9
60 g	11	11
70 g	13	13
80 g	14	14
90 g	16	16
100 g	18	18
110 g	20	20
120 g	22	22
130 g	23	23
140 g	25	25
150 g	27	27
160 g	29	29
170 g	31	31
180 g	32	32
190 g	34	34

Tomato Macros by Volume Measure

Volume Measure	Equivalent Weight	Calories (kcal)	Protein	Carbs	Fat
1 US teaspoon	4.7 g	0.8	0 g	0.2 g	0 g
1 US tablespoon	14 g	2.5	0.1 g	0.5 g	0 g
1 US fluid ounce	28.1 g	5.1	0.3 g	1.1 g	0.1 g
1/4 US cup	56.2 g	10.1	0.5 g	2.2 g	0.1 g
1/3 US cup	74.9 g	13.5	0.7 g	2.9 g	0.1 g
1/2 US cup	112.4 g	20.2	1 g	4.4 g	0.2 g
1 US cup	224.8 g	40.5	2 g	8.8 g	0.4 g
1 US pint	449.5 g	80.9	4 g	17.5 g	0.9 g
1 US quart	899 g	161.8	8.1 g	35.1 g	1.8 g
1 US gallon	3596.1 g	647.3	32.4 g	140.2 g	7.2 g
100 mL	95 g	17.1	0.9 g	3.7 g	0.2 g
1 liter	950 g	171	8.6 g	37.1 g	1.9 g

Tomato Prep-State Logging Check

Prep State	Weight	Calories	Concentration
Raw	100 g	18 kcal	18 kcal/100 g
Cooked data not listed	Use cooked USDA entry	Do not infer	Separate cooked record preferred

Tomato Nutrient Efficiency Per Calorie

Nutrient	Per 100 g	Per 100 kcal	% Daily Value (per 100 g)
Protein	0.9 g	5 g/100 kcal	1.8%
Carbs	3.9 g	21.67 g/100 kcal	1.4%
Fat	0.2 g	1.11 g/100 kcal	0.3%

Tomato Dietary Profile

Tomato is a versatile food suitable for most dietary patterns. Check macros above for your specific dietary requirements.

Tomato Benefit Signals

Low-carb base: Low carbohydrate level can fit low-carb meal planning. Basis: carbs <= 5 g per 100 g.

Tomato Daily Nutrient Coverage

Nutrient	This serving	Reference	Coverage	Signal
Protein	1 g	50 g	2%	Starter contribution
Sodium	0 mg	2300 mg	0%	Low limit contribution
Potassium	0 mg	4700 mg	0%	Starter contribution

Smart Calories Substitutes for Tomato

Food	Equivalent portion	Category	Protein delta	Calorie delta	Sodium delta
Lentils	5 g	Vegetable	+0.4 g	+0 kcal	+0 mg
Lentils	16 g	Vegetable	+0.5 g	+0 kcal	+0 mg
Chickpeas	11 g	Vegetable	+0.1 g	+0 kcal	+0 mg
Black beans	14 g	Vegetable	+0.2 g	+0 kcal	+55 mg
Potato	23 g	Vegetable	-0.4 g	+0 kcal	+0 mg
Sweet potato	21 g	Vegetable	-0.6 g	+0 kcal	+0 mg

Tomato Condition-Aware Nutrition Notes

Type	Context	Guidance	Basis
mayFit	low sodium goal	May fit low-sodium meal planning at this serving size.	0 mg sodium

Real-World Tomato Serving Sizes

Small weighed portion (~50g): 9 kcal calories. Use when testing a small serving or recipe ingredient amount.
Standard nutrition reference (~100g): 18 kcal calories. Matches the USDA per-100g source basis used on this page.
Large weighed portion (~150g): 27 kcal calories. Useful for meal-prep portions and larger servings.

Common Tomato Measurement Mistakes

Mixing raw and cooked entries changes the math. This page uses the listed source record for Tomato, raw.
Adding oil, sauces, sweeteners, breading, or drained liquid changes calories and macros beyond the base food values.
For calories tracking, keep the same unit basis across the meal: grams, ounces, cups, or count-based servings should not be mixed without conversion.

Tomato Calories — Frequently Asked Questions

How much calories is in 100g of Tomato? 100g of Tomato contains 18 kcal of calories (USDA FoodData Central).

How much calories in one Tomato? A typical tomato weighs about 123g and contains 22.1 kcal of calories. This is calculated as 123g ÷ 100 × 18 = 22.1 kcal.

How much calories is in 1 cup of Tomato? One US cup of tomato weighs approximately 225g (density: 950 kg/m³). That serving contains 40.5 kcal of calories — computed as 225g ÷ 100 × 18.

How many grams of Tomato do I need to eat to get 500 kcal of calories? To reach 500 kcal of calories from Tomato, you need approximately 2778g — calculated as (500 ÷ 18) × 100 = 2778g.

Is Tomato high in calories? Tomato is low in calories at 18 kcal per 100g. If you're targeting this nutrient, Tomato alone is unlikely to be sufficient.

How efficient is Tomato as a source of calories per calorie? Tomato provides 100 kcal of calories per 100 kcal, making it excellent as a calories-per-calorie source. This is useful for calorie-restricted diets where macronutrient density matters.

What formula does this Tomato calories calculator use? The calculator uses calories = weight in grams / 100 x 18 kcal. For example, 100g of Tomato gives 18 kcal of calories. Volume entries are first converted to grams using the food density value, then the same per-100g formula is applied.

Is Tomato a good food for weight gain or calorie surplus goals? For weight gain or calorie surplus goals, Tomato is a modest contributor — with 18 kcal of calories per 100g. For best results, combine Tomato with other foods to hit your daily macro targets.

How reliable is the source data for Tomato? Tomato uses USDA FoodData Central reference as the nutrition source. Gram-based calculations use the per-100g source values, while cup and spoon estimates depend on the listed density and should be treated as practical serving estimates.

Should I measure Tomato raw or cooked? Tomato should be logged in the same prep state as the source record. If you weighed it cooked, avoid comparing it directly with a raw entry unless a cooked yield factor is available.

How to Calculate Tomato Calories

Weigh raw. Place your tomato on a kitchen scale before cooking to get the most accurate starting weight.
Enter weight into the calculator. Select your unit (g, oz, lb, or cup) and hit Calculate.
Read the result. The calculator shows calories content for your exact portion.
Compare servings. Use the serving range table below to quickly compare calories across portion sizes.
Log to your tracker. Enter the raw weight and raw entry in your nutrition app for consistent macro tracking.

Compare Tomato Calories to Similar Foods

More Tomato Nutrition Pages

Why Volume ≠ Weight: Tomato Density Explained

Tomato has a medium density (950 kg/m³). A 1-cup measure holds approximately 225 g.

Why does density matter? The same volume can hold very different amounts of food depending on how dense it is. Oats (350 kg/m³) are light and airy — 1 cup = ~80 g. Water has a density of 1000 kg/m³ — 1 cup = 236 g. This is why nutrition labels use weight (grams), not volume — it's a more reliable measure.

Formula: mass (g) = volume (mL) × density (kg/m³) ÷ 1,000. This calculator uses this formula automatically when you enter a volume measure for Tomato.

Tomato Page Quality Signals

Source, density, prep-state, serving, and allergen checks used to decide whether this page is safe to promote from generated to indexed.

Data Sources & Methodology

Data source: USDA FoodData Central.

Computation method: Macro values are calculated by multiplying the food's per-100g value by the requested weight in grams, then dividing by 100. Volume inputs are first converted to grams using the food's density (kg/m³) from USDA data, then the same formula applies: calories = (weight_g / 100) × caloriesPer100g.

Accuracy note: Macro values represent averages across measured samples; individual items may vary ±5–10% depending on brand, farming method, and preparation technique. For clinical nutrition, consult a registered dietitian.

Update policy: Macro values are reviewed quarterly against USDA FoodData Central updates. Page last verified: 2026.

100g Tomato Calories — 18 kcal | Nutrition Calculator

100g of Tomato, raw contains 18 kcal of calories. Free converter with serving tables, volume conversion, raw vs cooked, and FAQs. Data from USDA FoodData Central.

Select Food Source

Direction

Amount

Target

calories

18kcal

Safety: sodium pendingPortion: 3.53 ozFood fit: 58/100

Best benefits

Calorie-light volume: Useful when users want more plate volume without many calories.

Easy portioning: Has real-world serving anchors that make logging less confusing.

Smart substitutes

Equivalent portions from local nutrition data.

Mushroom, white, raw

82 g | 4.55 pieces | 0.99 cups

+1.6g protein | +0 kcal | +0mg sodium

adds 1.6g protein

Mushroom, Crimini

60 g | 0.25 cups

+0.9g protein | +0 kcal | +3mg sodium

adds 0.9g protein

Peas, Green, Sweet, Canned, Sodium Added, Sugar Added, Drained and Rinsed

22 g | 0.09 cups

+0.2g protein | +0 kcal | +47mg sodium

adds 0.2g protein

Day coverage starter

What this serving contributes if logged today.

Current serving

Protein

0.9 g

Sodium

0 mg

Fiber

0 g

Potassium

0 mg

Calcium

0 mg

Condition-aware guardrails

Top flags only; details stay clinician-safe.

May fit: May fit low-sodium meal planning for this serving.

Method, report, serving, and clinician note

Goal fit: 4% of 500kcal calories reference target.

Serving reality: 3.53 oz, 0.44 cups, 0.81 pieces.

Method: source per 100g, density conversion, serving math, and raw/cooked yield estimate when available.

Clinician note: General nutrition reference, not medical diagnosis. For kidney disease, pregnancy, diabetes, allergies, or prescribed diets, confirm with a clinician.

Confidence: USDA FoodData Central reference, deterministic per-100g scaling.|No major allergen flag in this source record.

Nutrition intelligence for this serving

Safety, portion, raw/cooked, and professional context tied to the current converter input.

Daily safety snapshot

0mg sodium

0% sodium limit | 0% sat fat | 0% fiber target

Raw/cooked correction

88g113.6g

cooked from raw | raw from cooked

Portion meaning

3.53oz

0.44 cups | 0.81 pieces

3.53 oz0.44 cups7.1 tbsp0.81 pieces

Quality and next best move

58/100

Alternative for 500 kcal calories: 33g Flour, Rice, White, Unenriched

Better swap: Potato, Russet, raw

Looks good for General healthy adult: no obvious logging issue detected.

Target progress18 / 500

Why this score?

Protein Density

3/100

Fiber Density

0/100

Sodium Load

100/100

Sat Fat Load

100/100

Micronutrient Density

0/100

Calorie Density

100/100

Allergen Risk

100/100

Complete nutritional profile

Show electrolytes

Full micronutrients

calories

18kcal

protein

0.9g

carbs

3.9g

fat

0.2g

sodium

0mg

potassium

0mg

magnesium

0mg

caffeine

0mg

Source: USDA FoodData Central reference|generic•Energy density: 40 kcal/cup

100g Tomato Calories Calculator

Result

100g Tomato Calories

18 kcal calories

Computed from 100 g of food and USDA FoodData Central reference.

Reverse Calculation

Calories target to food amount

100 g (3.53 oz, 0.44 cups)

Reverse math uses 18 kcal calories per 100 g from USDA FoodData Central reference.

Tomato Macros by Serving Size

Weight	Calories (kcal)	Protein	Carbohydrates	Fat
10 g	1.8	0.1 g	0.4 g	0 g
25 g	4.5	0.2 g	1 g	0.1 g
50 g	9	0.5 g	2 g	0.1 g
100 g	18	0.9 g	3.9 g	0.2 g
150 g	27	1.4 g	5.9 g	0.3 g
200 g	36	1.8 g	7.8 g	0.4 g
250 g	45	2.3 g	9.8 g	0.5 g

Tomato Macros by Common Serving

Serving	Weight	Calories	Protein	Carbs	Fat
Small portion	75 g	14	0.7 g	2.9 g	0.2 g
Standard serving	100 g	18	0.9 g	3.9 g	0.2 g
Large serving	150 g	27	1.4 g	5.9 g	0.3 g

Tomato Calories Range Around 100g

Weight	Calories	Calories
50 g	9	9
60 g	11	11
70 g	13	13
80 g	14	14
90 g	16	16
100 g	18	18
110 g	20	20
120 g	22	22
130 g	23	23
140 g	25	25
150 g	27	27
160 g	29	29
170 g	31	31
180 g	32	32
190 g	34	34

Tomato Macros by Volume Measure

Volume Measure	Equivalent Weight	Calories (kcal)	Protein	Carbs	Fat
1 US teaspoon	4.7 g	0.8	0 g	0.2 g	0 g
1 US tablespoon	14 g	2.5	0.1 g	0.5 g	0 g
1 US fluid ounce	28.1 g	5.1	0.3 g	1.1 g	0.1 g
1/4 US cup	56.2 g	10.1	0.5 g	2.2 g	0.1 g
1/3 US cup	74.9 g	13.5	0.7 g	2.9 g	0.1 g
1/2 US cup	112.4 g	20.2	1 g	4.4 g	0.2 g
1 US cup	224.8 g	40.5	2 g	8.8 g	0.4 g
1 US pint	449.5 g	80.9	4 g	17.5 g	0.9 g
1 US quart	899 g	161.8	8.1 g	35.1 g	1.8 g
1 US gallon	3596.1 g	647.3	32.4 g	140.2 g	7.2 g
100 mL	95 g	17.1	0.9 g	3.7 g	0.2 g
1 liter	950 g	171	8.6 g	37.1 g	1.9 g

Tomato Prep-State Logging Check

Prep State	Weight	Calories	Concentration
Raw	100 g	18 kcal	18 kcal/100 g
Cooked data not listed	Use cooked USDA entry	Do not infer	Separate cooked record preferred

Tomato Nutrient Efficiency Per Calorie

Nutrient	Per 100 g	Per 100 kcal	% Daily Value (per 100 g)
Protein	0.9 g	5 g/100 kcal	1.8%
Carbs	3.9 g	21.67 g/100 kcal	1.4%
Fat	0.2 g	1.11 g/100 kcal	0.3%

Tomato Dietary Profile

Tomato is a versatile food suitable for most dietary patterns. Check macros above for your specific dietary requirements.

Tomato Benefit Signals

Low-carb base: Low carbohydrate level can fit low-carb meal planning. Basis: carbs <= 5 g per 100 g.

Tomato Daily Nutrient Coverage

Nutrient	This serving	Reference	Coverage	Signal
Protein	1 g	50 g	2%	Starter contribution
Sodium	0 mg	2300 mg	0%	Low limit contribution
Potassium	0 mg	4700 mg	0%	Starter contribution

Smart Calories Substitutes for Tomato

Food	Equivalent portion	Category	Protein delta	Calorie delta	Sodium delta
Lentils	5 g	Vegetable	+0.4 g	+0 kcal	+0 mg
Lentils	16 g	Vegetable	+0.5 g	+0 kcal	+0 mg
Chickpeas	11 g	Vegetable	+0.1 g	+0 kcal	+0 mg
Black beans	14 g	Vegetable	+0.2 g	+0 kcal	+55 mg
Potato	23 g	Vegetable	-0.4 g	+0 kcal	+0 mg
Sweet potato	21 g	Vegetable	-0.6 g	+0 kcal	+0 mg

Tomato Condition-Aware Nutrition Notes

Type	Context	Guidance	Basis
mayFit	low sodium goal	May fit low-sodium meal planning at this serving size.	0 mg sodium

Real-World Tomato Serving Sizes

Small weighed portion (~50g): 9 kcal calories. Use when testing a small serving or recipe ingredient amount.
Standard nutrition reference (~100g): 18 kcal calories. Matches the USDA per-100g source basis used on this page.
Large weighed portion (~150g): 27 kcal calories. Useful for meal-prep portions and larger servings.

Common Tomato Measurement Mistakes

Mixing raw and cooked entries changes the math. This page uses the listed source record for Tomato, raw.
Adding oil, sauces, sweeteners, breading, or drained liquid changes calories and macros beyond the base food values.
For calories tracking, keep the same unit basis across the meal: grams, ounces, cups, or count-based servings should not be mixed without conversion.

Tomato Calories — Frequently Asked Questions

How much calories is in 100g of Tomato? 100g of Tomato contains 18 kcal of calories (USDA FoodData Central).

How much calories in one Tomato? A typical tomato weighs about 123g and contains 22.1 kcal of calories. This is calculated as 123g ÷ 100 × 18 = 22.1 kcal.

How much calories is in 1 cup of Tomato? One US cup of tomato weighs approximately 225g (density: 950 kg/m³). That serving contains 40.5 kcal of calories — computed as 225g ÷ 100 × 18.

How many grams of Tomato do I need to eat to get 500 kcal of calories? To reach 500 kcal of calories from Tomato, you need approximately 2778g — calculated as (500 ÷ 18) × 100 = 2778g.

Is Tomato high in calories? Tomato is low in calories at 18 kcal per 100g. If you're targeting this nutrient, Tomato alone is unlikely to be sufficient.

How to Calculate Tomato Calories

Weigh raw. Place your tomato on a kitchen scale before cooking to get the most accurate starting weight.
Enter weight into the calculator. Select your unit (g, oz, lb, or cup) and hit Calculate.
Read the result. The calculator shows calories content for your exact portion.
Compare servings. Use the serving range table below to quickly compare calories across portion sizes.
Log to your tracker. Enter the raw weight and raw entry in your nutrition app for consistent macro tracking.

Compare Tomato Calories to Similar Foods

More Tomato Nutrition Pages

Why Volume ≠ Weight: Tomato Density Explained

Tomato has a medium density (950 kg/m³). A 1-cup measure holds approximately 225 g.

Formula: mass (g) = volume (mL) × density (kg/m³) ÷ 1,000. This calculator uses this formula automatically when you enter a volume measure for Tomato.

Tomato Page Quality Signals

Source, density, prep-state, serving, and allergen checks used to decide whether this page is safe to promote from generated to indexed.

Data Sources & Methodology

Data source: USDA FoodData Central.

Update policy: Macro values are reviewed quarterly against USDA FoodData Central updates. Page last verified: 2026.