A medium whole cucumber with peel contains roughly 20 to 25 calories, while 100 grams of raw cucumber or one cup of thinly sliced cucumber contains about 15. Weight gives you the clearest estimate for your meal or snack.
You’ll find practical calorie counts for whole cucumbers, cucumber slices, common servings, pickles, salads, and weight-based tracking in this guide.
Basic Calorie Counts for Raw Cucumber
A medium cucumber weighing about 200 grams without trimming contains roughly 20 to 25 calories. That figure fits the serving used in many U.S. nutrition databases, but your cucumber may differ in length, diameter, and edible weight.
Raw cucumber with peel supplies about 15 calories per 100 grams. One cup of thinly sliced cucumber also contains about 15 calories because a standard cup holds close to 100 grams. You receive nearly the same total from either measure when their weights match.
| Raw serving | Approximate weight | Approximate energy |
|---|---|---|
| Medium whole cucumber with peel | About 200 grams | 20 to 25 calories |
| Measured cucumber portion | 100 grams | About 15 calories |
| Thinly sliced raw cucumber | 1 cup, about 100 grams | About 15 calories |
| Individual thin slice | About 5 to 7 grams | About 1 calorie |
An individual cucumber slice has no dependable calorie total until you know its weight and thickness. Six broad slices might weigh 35 grams, while six narrow slices from a long, slender cucumber could weigh much less.
Why Cucumbers Have Few Calories
Water Dominates Cucumber Weight
About 95 percent of a cucumber’s weight comes from water. Only a small amount of carbohydrate, dietary fiber, protein, and fat remains in each gram, which keeps plain cucumber’s energy total low.
Consider the difference between cucumber and a dense sesame seed. Although both pieces can fit in your hand, the seed contains much more energy per gram, while cucumber’s water-heavy flesh spreads its edible nutrients across a larger volume.
Fiber and Vitamin K Add No Calories
A measured cup contains a modest quantity of dietary fiber along with small amounts of carbohydrate, fat, and protein. Cucumber nutrition facts also list vitamin K, but neither vitamin K nor water supplies calories.
Your hydration benefit differs from an energy benefit. Water supports fluid balance, while carbohydrate, protein, fat, and alcohol supply calories. Cucumber contains only trace amounts of these energy-producing macronutrients.
Calorie Counts Across Common Servings
Slice counts create uncertainty because thickness and diameter change the amount of cucumber flesh in your hand. Weight gives you a firmer basis: a 150-gram cucumber has about 23 calories, while a 250-gram cucumber has about 38.
You can calculate a close estimate for raw cucumber with this four-step method:
- Weigh the edible portion. Remove discarded peel, seeds, or stems before placing the cucumber on your kitchen scale.
- Record the gram total. A whole cucumber can weigh between 100 and 400 grams, depending on its variety and growing conditions.
- Apply the gram rate. Multiply the weight by 0.15 for a baseline estimate using raw cucumber with peel.
- Add every other ingredient. Record oil, dressing, cheese, sugar, and seasonings separately from the vegetable’s energy.
A 220-gram cucumber at 0.15 calories per gram provides about 33 calories. A label listing 15 calories per cup applies to the entire cucumber only if its edible weight also matches that serving.
| Whole cucumber size | Likely edible weight | Estimated total |
|---|---|---|
| Small cucumber | 100 to 150 grams | About 15 to 23 calories |
| Medium cucumber | 180 to 220 grams | About 27 to 33 calories |
| Large cucumber | 250 to 300 grams | About 38 to 45 calories |
These whole-cucumber estimates differ from the familiar 20-to-25-calorie figure because their assumed weights differ. Published records may classify another size as medium, so your kitchen scale gives you a more dependable result for your own tracking.
Published serving estimates depend on size and form, so actual weight can vary substantially.
How Size, Peel, and Seeds Affect Weight
Length and Diameter Change the Estimate
Diameter gives you a better clue than length alone. A wide English cucumber and a slender Persian cucumber can fit inside the same package, yet the wider vegetable can contain more edible weight and therefore more calories.
Your estimate can range from about 10 calories for a very small cucumber to 30 calories or more for a large one. Variety also affects the result, particularly for seedless English cucumbers, pickling cucumbers, and long Persian varieties.
Peeling and Seeding Lower Edible Mass
Peeling removes a thin layer containing a small amount of carbohydrate. The change barely alters the vegetable’s low-calorie character, but it slightly lowers the total energy and carbohydrate you consume.
Seeding can remove more edible material, especially from a mature cucumber with a soft center. You still receive a nutrient-dense vegetable, but your calorie total depends on the weight left after preparation.
Weigh the cucumber before peeling or seeding for exact tracking. Your edible weight provides a firmer basis than length, appearance, or a package serving.
A kitchen scale gives you the cleanest answer for an unfamiliar cucumber variety or size. USDA FoodData Central entries can support your raw-food baseline, while a commercial database such as MyFitnessPal can help check a specific entry. Match both the raw form and serving weight before using either figure.
Once the cucumber’s edible weight is clear, preparation can still shift the total through added oil, sugar, brine, or moisture loss.
Raw, Cooked, Pickled, and Dressed Counts
Plain raw cucumber gives you the cleanest baseline for your meal total. Cooking reduces the water in a given serving, so its calories become more concentrated even though heat alone adds little energy.
| Preparation | What changes | Tracking approach |
|---|---|---|
| Raw with peel | Maximum edible mass and water content | Use about 15 calories per 100 grams |
| Cooked plain | Water loss concentrates energy per cup | Use a cooked-food database entry |
| Plain pickled | Vinegar adds flavor with little energy | Check for sugar or added oils |
| Dressed salad | Oil, sugar, cheese, and sauces raise the total | Measure each added ingredient |
| Sweetened pickle | Syrup can add several calories per slice | Read the Nutrition Facts label |
One tablespoon of olive oil adds about 120 calories, enough to turn a 25-calorie cucumber into a richer dish. Ranch dressing, vinaigrette, bacon, cheese, and sweet pickles can also erase the small energy total you expected from the vegetable.
Prepared salads need a full-ingredient count because the bowl’s cucumber weight accounts for only part of the finished total. Cucumber with vinegar can stay near its baseline, while a creamy salad can carry several hundred calories.
Calculating a Reliable Meal Total
A dependable total starts with the cucumber’s edible weight and ends with every ingredient added after preparation. That method fits a plain salad, snack plate, or full meal.
Use a Six-Step Weight Check
- Weigh before cutting. Record the edible weight of your cucumber in grams.
- Choose a matching entry. Select raw, cooked, pickled, or prepared data based on the actual form.
- Convert the rate. Multiply grams by 0.15 for a raw cucumber estimate.
- Measure toppings. Record oil, dressing, cheese, sugar, and other additions separately.
- Check package data. Use the Nutrition Facts label for cucumber inside a prepared product.
- Keep the edible total. Remove seeds and discarded peel before calculating your consumed amount.
Without a scale, compare your cucumber with a known reference or use a package serving estimate. One cup of raw slices at about 15 calories gives you a useful baseline even if the original vegetable no longer fits in your hand.
For your daily calorie needs, plain cucumber adds volume and water with few calories. Record prepared versions under their actual ingredients, because the vegetable alone does not represent the finished salad or snack.
Bottom Line for Your Calorie Tracking
Your most dependable cucumber estimate begins with edible weight: raw cucumber supplies about 15 calories per 100 grams, so a medium whole cucumber falls near 20 to 30 calories. Record oil, dressing, cheese, or sugar separately because toppings can supply more energy than the cucumber itself.
FAQ
How many calories are in one cucumber?
A cucumber’s calorie count depends on its edible weight. A small cucumber may contain about 15 calories, a medium cucumber roughly 20 to 30, and a larger cucumber 30 to 45. You get the cleanest estimate from a 100-gram baseline of about 15 calories.
How many calories are in a whole cucumber?
A whole cucumber contains an amount based on its edible weight. Small varieties may provide about 15 calories, medium cucumbers roughly 20 to 30, and larger cucumbers 30 to 45. A 100-gram portion gives you the cleanest baseline.
How many calories does a medium cucumber contain?
A medium cucumber with peel commonly contains about 20 to 25 calories in standard nutrition references. Another size classification may produce 27 to 33 calories. Weigh yours and use about 0.15 calories per gram for a closer estimate.
How many calories are in a 100-gram serving of cucumber?
Raw cucumber with peel contains about 15 calories per 100 grams. A cooked serving can differ because draining removes water and concentrates the remaining macronutrients.
How many calories are in one cup of sliced cucumber?
One cup of thinly sliced raw cucumber contains about 15 calories. That estimate assumes roughly 100 grams, so a fuller or heavier cup can contain more.
How many calories are in 100 grams of cucumber?
Raw cucumber with peel contains about 15 calories per 100 grams. Your calculation changes after draining cooked cucumber because the same serving may weigh less. Oils, dressings, sugar, and other toppings also require separate calorie counts.
