Cucumber Macros: Complete Nutrition Guide

Cucumbers are the ultimate volume food. At 16 calories per cup and 95% water, they’re essentially calorie-free while still providing crunch, freshness, and hydration. For anyone watching their weight, cucumbers are the closest thing to a “free food” that exists.

But calling cucumbers “just water” undersells them. They provide some nutrients, help you stay hydrated, and play a valuable role in meal composition. Understanding their (minimal) macros helps you use them strategically.

This guide covers everything about cucumber nutrition—which admittedly doesn’t take long, because cucumbers are beautifully simple.

Cucumber Macros: Quick Reference

Here’s the full breakdown for cucumbers.

Per Cup Sliced (104g, with peel)

Nutrient	Amount	% Daily Value
Calories	16	<1%
Protein	0.7g	1%
Total Carbs	3.8g	1%
Fiber	0.5g	2%
Net Carbs	3.3g	-
Fat	0.1g	0%
Sugar	1.7g	-
Vitamin K	17mcg	19%
Vitamin C	2.8mg	3%
Potassium	152mg	3%
Water	99g	-

Per Whole Cucumber (Medium, 8 inches)

Nutrient	Amount
Calories	45
Protein	2g
Total Carbs	11g
Fiber	1.5g
Net Carbs	9.5g
Fat	0.3g
Water	287g

Per 100g (with peel)

Nutrient	Amount
Calories	15
Protein	0.65g
Carbs	3.6g
Fiber	0.5g
Fat	0.1g

Key insight: Cucumbers are 95-96% water. The remaining 4-5% is mostly fiber and a tiny amount of natural sugars.

Cucumber Types Compared

Regular (Slicing) Cucumber

Per Whole	Amount
Calories	45
Weight	~300g
Carbs	11g

Standard supermarket cucumber. Thicker skin, contains seeds.

English (Hothouse/Seedless) Cucumber

Per Whole	Amount
Calories	34
Weight	~250g
Carbs	8g

Longer, thinner skin, no seeds. Slightly less dense.

Persian (Mini) Cucumbers

Per Cucumber	Amount
Calories	8-10
Weight	~55g
Carbs	2g

Smaller, crunchier, thinner skin. Perfect for snacking.

Kirby (Pickling) Cucumbers

Per Cucumber	Amount
Calories	15
Weight	~100g
Carbs	4g

Bumpy texture, firm flesh. Used for pickles.

Bottom line: All cucumber types have nearly identical macros per weight. Choose based on texture preference and use case.

Why Cucumbers Are Valuable for Macro Tracking

Volume Without Calories

Cucumbers let you eat more food without more calories.

Example:

• 2 cups cucumber salad: 32 calories
• 2 cups Caesar salad: 400+ calories

Adding cucumbers to any meal increases volume and satisfaction at almost no caloric cost.

Hydration

Cucumbers are 95% water. Eating them contributes to daily fluid intake—useful for:

• People who don’t drink enough water
• Hot weather
• Exercise recovery
• Feeling full on fewer calories

Crunch Satisfaction

The mechanical satisfaction of crunching contributes to satiety. Cucumbers provide this without the calories of chips, crackers, or other crunchy snacks.

Cucumbers for Different Diet Goals

Cucumbers for Weight Loss

Verdict: Perfect weight loss food.

How to use cucumbers for weight loss:

• Add to every salad (more volume)
• Snack on instead of chips/crackers
• Add to sandwiches and wraps
• Make cucumber “chips” with seasoning
• Use as dippers instead of bread/crackers

Calorie substitution:

• 1 oz potato chips: 152 calories
• 1 cup cucumber slices: 16 calories
• Savings: 136 calories for similar crunch volume

Use our Macro Calculator to plan your daily intake.

Cucumbers on Keto

Verdict: Perfect keto food.

Per cup: Only 3.3g net carbs

Cucumbers are one of the lowest-carb vegetables available. Eat freely on any low-carb or keto diet.

Keto uses:

• Dip vehicle for high-fat dips
• Salad base instead of higher-carb vegetables
• Snacking with cheese or deli meat
• Cucumber “boats” filled with tuna salad

Cucumbers for Flexible Dieting

For IIFYM, cucumbers are essentially a “free” food. Track them for completeness, but they won’t impact your macros meaningfully.

When to track cucumbers:

• If eating massive quantities (3+ cups)
• For precise calorie counting
• For complete food diary

When to skip tracking:

• As minor salad ingredient
• As garnish
• For rough macro counting

Learn more in our Flexible Dieting Guide.

Cucumber vs Other Low-Calorie Vegetables

How do cucumbers compare to other “volume” vegetables?

Vegetable (1 cup raw)	Calories	Carbs	Fiber	Water %
Cucumber	16	3.8g	0.5g	95%
Celery	14	3g	1.6g	95%
Lettuce (iceberg)	10	2g	1g	96%
Zucchini	21	4g	1.2g	95%
Tomato	32	7g	2g	94%
Bell pepper	30	6g	2g	92%
Radishes	19	4g	2g	95%
Spinach	7	1g	0.7g	91%

Cucumbers rank among the lowest calorie options alongside celery and lettuce.

See also: Zucchini Macros | Kale Macros

How to Use Cucumbers in Meals

As a Base

Cucumber noodles: Use a spiralizer to make cucumber “zoodles”

• Zero cooking required
• Lower carb than zucchini noodles
• Fresh, light alternative to pasta

Cucumber salad base: Replace some lettuce with sliced cucumbers for variety and crunch

As a Dipper

Replace chips, crackers, and bread with cucumber slices:

• Hummus: 50 cal + 16 cal cucumber vs 50 cal + 150 cal pita
• Guacamole: Same swap, major calorie savings
• Deli meat rollups: Meat + cheese + cucumber instead of bread

As a Hydration Tool

Cucumber water: Infuse water with sliced cucumber for subtle flavor

• Encourages more water consumption
• Zero calories
• Light, refreshing taste

Smoothie addition: Add cucumber to green smoothies

• Adds liquid volume
• Minimal flavor impact
• Reduces need for ice

In Meals

Greek salad: Cucumber + tomato + feta + olives + olive oil

• Per serving: ~200 cal, refreshing and filling

Tzatziki: Greek yogurt + grated cucumber + garlic + dill

• Per 2 tbsp: ~15 cal
• Great for protein boost (from yogurt)

Gazpacho: Cold cucumber soup

• Incredibly low calorie
• Refreshing in summer

Asian cucumber salad: Cucumber + rice vinegar + sesame + soy

• Per cup: ~25 cal
• Great side dish

Cucumber Snack Ideas

Simple Snacks (Under 50 Calories)

Snack	Calories
1 cup cucumber slices	16
Cucumber with salt and pepper	16
Cucumber with lime juice + tajin	20
Cucumber with rice vinegar	16

Paired Snacks (Under 150 Calories)

Snack	Calories
1 cup cucumber + 2 tbsp hummus	66
Cucumber + 1 oz cheese	126
Cucumber + 2 tbsp Greek yogurt dip	36
Cucumber + 1 tbsp nut butter	110

Cucumber “Sandwiches”

Use cucumber slices as “bread”:

• Cucumber + cream cheese + smoked salmon: ~80 cal per “sandwich”
• Cucumber + tuna salad: ~60 cal
• Cucumber + turkey + mustard: ~40 cal

Nutrition Beyond Macros

While cucumbers are mostly water, they do provide some nutrients:

Vitamin K

One cup provides 19% of daily vitamin K needs, important for:

• Blood clotting
• Bone health
• Heart health

Antioxidants

Cucumbers contain:

• Vitamin C (small amount)
• Beta-carotene
• Flavonoids
• Tannins

Concentrated mostly in the skin.

Hydration

A medium cucumber contains about 287g of water—roughly a cup. This contributes to:

• Daily fluid requirements
• Skin health
• Digestive function
• Temperature regulation

Peel On vs Peel Off

With Peel

Per Cup	Amount
Calories	16
Fiber	0.5g
Vitamin K	19% DV

More fiber, more nutrients, may have pesticides if not organic.

Without Peel

Per Cup	Amount
Calories	14
Fiber	0.2g
Vitamin K	6% DV

Less fiber, fewer nutrients, no pesticide concerns.

Recommendation: Eat with peel when possible. If using conventional cucumbers, wash thoroughly under running water.

Common Cucumber Questions

Do Cucumbers Have Any Protein?

Technically yes—about 0.7g per cup. But this is nutritionally insignificant. Don’t count cucumbers toward protein goals.

Are Cucumbers Negative Calories?

No food is truly “negative calorie.” However, cucumbers are so low in calories (16 per cup) that the difference between “virtually zero” and “actually zero” is meaningless for practical purposes.

Can I Eat Too Many Cucumbers?

Practically, no. You’d need to eat enormous quantities for any negative effects. Some considerations:

• Very high cucumber intake may cause bloating (fiber + water volume)
• Cucumbers can interact with blood thinners (vitamin K)
• Otherwise, eat freely

Are Pickles the Same as Cucumbers?

Pickles are cucumbers preserved in brine. Nutritionally:

Per Cup	Cucumber	Dill Pickle
Calories	16	17
Sodium	2mg	1,251mg

Key difference: Pickles are extremely high in sodium. Otherwise similar.

Why Are My Cucumbers Bitter?

Bitterness comes from cucurbitacins, compounds that increase with:

• Plant stress (inconsistent watering)
• Temperature extremes
• Overly mature cucumbers

To reduce: Cut off ends (where bitterness concentrates) and peel if necessary.

Storing Cucumbers

Refrigerator Storage

• Whole: 7-10 days in crisper drawer
• Cut: 3-4 days in sealed container
• Sliced: 1-2 days (gets watery)

Prep Tips

• Don’t slice until ready to use
• If pre-slicing, pat dry before storing
• Cold cucumbers are crispest
• Room temperature cucumbers have more flavor

The Bottom Line on Cucumber Macros

The facts:

• 16 calories per cup—virtually nothing
• 95% water—excellent for hydration
• 3.3g net carbs per cup—keto-friendly
• Negligible protein and fat
• Some vitamin K and minor nutrients

Best uses:

• Volume food for weight loss
• Crunch substitute for chips/crackers
• Salad and meal extender
• Hydration support
• Low-carb snacking vehicle
• Dip delivery system

Bottom line: Cucumbers are a “free food” for practical macro tracking. They provide volume, crunch, and hydration with essentially no caloric cost. If you’re trying to lose weight, adding cucumbers to meals and snacks is one of the simplest strategies that actually works.

There’s no need to overthink cucumbers. Eat them freely, enjoy the crunch, and appreciate having a food that lets you eat more while consuming less.

For understanding how cucumbers fit into your overall nutrition picture, read What Are Macronutrients.