How Many Calories Are In Tomatoes And Cucumbers? | Fresh Facts

Calories In Tomatoes & Cucumbers: By Serving Size

Calories swing with size and cut. A medium tomato lands near 25 calories, and a third of a medium cucumber (about 99 g) sits near 10 calories on the FDA raw-vegetable chart. Per 100 grams, many databases show about 18 kcal for tomatoes and roughly 15 kcal for cucumbers with peel, based on USDA-sourced data.

Quick Comparison Table (Early Snapshot)

This first table keeps it simple: common servings with estimated calories. Values reflect raw, unseasoned produce.

Serving	Tomato Calories	Cucumber Calories
Per 100 g	~18 kcal	~15 kcal (with peel)
1 medium whole	~25 kcal (≈148 g)	~30–45 kcal (≈300 g whole)
1 cup chopped/sliced	~30–35 kcal	~14–16 kcal
Half a plate (mixed salad)	~20–40 kcal	~10–20 kcal

These numbers help with meal math. If you’re building a lighter plate, both picks fit well with other low-calorie foods without shrinking portions.

Why The Numbers Differ Across Apps

Tomato varieties carry different water and sugar levels. Cherry types pack slightly more natural sugars per bite, yet still sit low on the calorie scale. Beefsteak or heirloom tomatoes tend to be larger and juicier, so one piece can look “higher” only because it weighs more.

Cucumbers vary based on peel and seeds. With peel, the count often shows around 15 kcal per 100 g. Peeled versions lean even lower. Salting, draining, or pickling can shift water weight, so portions measured after prep may show small swings.

Serving size also matters. The FDA’s poster for raw produce uses typical household measures and gram weights to standardize labels in stores, which is why a “medium” tomato or “⅓ medium” cucumber carries a stated gram weight and calories next to it on those signs (FDA reference).

Tomatoes: Calories, Carbs, And Common Portions

Most raw tomatoes hover near 18 kcal per 100 g. One thin slice is around 3–5 calories. One medium fruit sits near 25 calories. A cup of chopped pieces runs near 30–35 calories. Cooking doesn’t change calories by itself, but roasting evaporates water, so a cup of roasted pieces will pack a bit more energy than a cup of fresh slices.

What Adds Extra Calories To Tomatoes

• Oil drizzles add ~120 kcal per tablespoon.
• Cheese toppings push counts up fast.
• Sugary dressings turn a fresh plate into a dessert-level side.

Cucumbers: Calories, Carbs, And Common Portions

With peel, a 100-gram amount often lands near 15 kcal. A cup of slices tends to sit near 14–16 calories because water dominates the weight. Peel brings a bit more fiber, while peeling trims a few calories by shaving off solids. Either way, the energy is low compared with many other sides.

What Adds Extra Calories To Cucumbers

• Full-fat yogurt sauces add energy; choose plain low-fat to keep the count down.
• Heavy mayo-based dressings climb fast.
• Seeds don’t change much; they’re light and water-rich.

Calories By Goal: Cutting, Holding, Or Gaining

Both foods help when you need volume with fewer calories. They’re easy to stack into bowls, wraps, or trays to stretch meals. If you’re maintaining weight, they offer crunch, acidity, and hydration without crowding out protein or grains. If you’re gaining, they still fit; just add calorie-dense partners like olive oil, avocado, grains, or cheese.

How Much Fits A Day’s Vegetable Target?

For adults, a daily pattern often aims for 2–3 cup-equivalents of vegetables. That comes from the Dietary Guidelines and CDC summaries of intake. One cup of raw sliced cucumber or chopped tomato counts as roughly one cup-equivalent in most plans. Mix colors and types to round out vitamins and minerals.

Smart Serving Ideas That Keep Calories Low

Speedy Bowl

Chop tomatoes, cucumbers, onion, and parsley. Splash with lemon juice and a teaspoon of olive oil. Salt and pepper, then serve. This adds just ~40–50 calories from oil to a large side that feeds two.

Sheet-Pan Tomato Burst

Toss cherry tomatoes with a teaspoon of oil and garlic. Roast hot until skins split. Toss with basil and a pinch of salt. The flavor concentrates, and the portion still stays light.

Cool Cucumber Salad

Slice thin, add vinegar, dill, and a spoon of plain yogurt if you want creaminess. No sugar needed for a crisp snap.

Kitchen Math: Weighing, Measuring, And Logging

Food scales shave off guesswork. Weigh a handful, note grams, then use per-100-gram values for fast logging. If you prefer cups, keep a mental map: one cup sliced cucumber is near 100–120 g; one cup chopped tomato is near 150–180 g, depending on cut and variety.

Store labels for raw produce in U.S. groceries rely on voluntary nutrition labeling rules for fruits and vegetables. Those posters tie each produce item to a gram weight and a calorie number so shoppers can compare at a glance. The FDA explains this system in its public materials for raw produce labeling.

Nutrition Beyond Calories

Tomatoes bring vitamin C, potassium, and carotenoids like lycopene. Cucumbers offer hydration, a touch of vitamin K, and crisp volume that helps plates feel full. Both add fiber with minimal energy, which can help meal satisfaction during a calorie cut.

Tomato Vs. Cucumber: Per-100-Gram Snapshot

Here’s a side-by-side look at common nutrients per 100 g. Values are rounded and drawn from USDA-sourced references.

Nutrient	Tomato (100 g)	Cucumber (100 g)
Calories	~18 kcal	~15 kcal (with peel)
Carbs	~3.9 g	~3.6 g
Fiber	~1.2 g	~0.5–0.7 g
Vitamin C	~14–20 mg	~2–4 mg
Potassium	~230–290 mg	~140–160 mg

Portion Control Tricks Without Losing Crunch

Go Big On Cut Size

Chunkier pieces slow bites. That taps into texture and stretch without adding energy.

Lean Dressings

Use lemon juice, vinegar, or a teaspoon of olive oil. A little fat boosts flavor; the teaspoon keeps calories predictable.

Protein Pairings

Add tuna, grilled chicken, beans, or cottage cheese on top. Now you’ve got a balanced plate that stays satisfying.

Frequently Misread Labels And Signs

Market tags often show calories for a “medium” item by weight. Your tomato might be bigger or smaller. If the tag says 148 g and your fruit weighs 180 g, your count will be a touch higher. The same goes for cucumbers: a 99 g segment will read low; a full 300 g piece will read higher.

Cooking And Prep That Change The Math

Roasting Tomatoes

Heat drives off water. Equal cups of roasted pieces carry more calories than equal cups of raw, even though the grams and per-gram energy stay the same.

Pickling Cucumbers

Brine adds sodium and a hint of sugar in some recipes. Calories stay low unless sweet brine or oil enters the mix.

Oil And Cheese

These are the usual culprits. Keep a teaspoon measure handy. One tablespoon of oil adds about 119 kcal, which can dwarf produce totals.

How To Build A Low-Calorie Salad That Satisfies

1. Start with a base of chopped cucumbers and tomatoes.
2. Add leafy greens for extra volume.
3. Pick one protein: beans, chicken, tofu, or fish.
4. Use a light dressing: lemon, herbs, and a teaspoon of olive oil.
5. Add crunch with seeds in measured amounts.

Label Rules Behind Those Store Posters

Grocery signs for raw produce follow federal guidance for voluntary labeling, with serving weights and nutrients listed for shoppers. The FDA’s page “Nutrition Information for Raw Vegetables” shows sample entries for tomato and cucumber so you can match your portions at home by grams and cups. That keeps your personal log close to what you see in stores.

Common Questions On Swaps And Mix-Ins

Can You Swap One For The Other?

Sure. Both bring water and crunch. Tomatoes add acidity and sweetness; cucumbers bring a cool bite. If you need fewer carbs, both are already low, and the difference per serving is small.

Best Oils And Add-Ins

Olive oil pairs well with both. Herbs like basil, dill, parsley, or mint lift flavor without adding meaningful calories. Onion, pepper, or a splash of vinegar round out the bowl.

Practical Takeaway

Both foods punch far below their size on calories. Build bigger plates, tune dressing amounts, and use a scale or cups to keep portions honest. You’ll get crunch, color, and hydration without blowing your daily target.

Want a simple daily habit list? Try our daily nutrition checklist.