Fruits
Lemon nutrition facts
A 1 undetermined wedge yields (6 g) serving of lemon provides 1 calories, 0 g protein, 0 g carbohydrate, and 0 g fat — about 4% of its calories from protein, 89% from carbohydrate, and 7% from fat. The interactive label below toggles between a serving and 100 g.
Calorie split
| Nutrient | Per 1 undetermined wedge yields (6 g) | Per 100 g |
|---|---|---|
| Calories | 1 | 22 |
| Protein | 0 g | 0 g |
| Total carbohydrate | 0 g | 7 g |
| Total fat | 0 g | 0 g |
Vitamins & minerals
Per serving (6 g)
- Vitamin C
- 2.28 mg
- Vitamin E
- 0.01 mg
- Thiamin (B1)
- 0.00 mg
- Riboflavin (B2)
- 0.00 mg
- Niacin (B3)
- 0.01 mg
- Vitamin B6
- 0.00 mg
- Folate (DFE)
- 1.18 mcg
- Magnesium
- 0.35 mg
- Phosphorus
- 0.47 mg
- Zinc
- 0.00 mg
- Copper
- 0.00 mg
- Manganese
- 0.00 mg
- Selenium
- 0.01 mcg
Photo by Angélica Echeverry on Unsplash
Selecting, storing & prepping lemon
- Selecting
- Choose lemons that feel heavy for their size with smooth, bright yellow skin — a sign of more juice inside.
- Storing
- Citrus fruit keeps about 10 days at room temperature or 1–2 weeks refrigerated. It doesn't freeze well whole.
- Prepping
- Rolling a lemon firmly on the counter before cutting breaks down the membranes inside and yields more juice.
Storage guidance from the USDA FoodKeeper database (FSIS, Cornell University, and the Food Marketing Institute).
Nutrition highlights
Per 1 undetermined wedge yields (6 g), lemon provides 0 g protein, 0 g carbohydrate, and 0 g fat, with no single vitamin or mineral reaching 10% of the Daily Value.
% of the FDA Daily Value per 1 undetermined wedge yields (6 g) serving.
Key metrics
Nutrient density
Per 100 kcal, lemon delivers about 7% of a Daily Value on average across 22 beneficial nutrients. The score is its percentile for that measure among the 177 foods in our database — higher means more nutrition per calorie. How this is calculated.
- More vitamin C than 94% of foods · 81% of fruits
Density counts protein, fiber, and vitamins and minerals (not fat, sodium, or sugar), each capped so a single nutrient can’t dominate, with a calorie floor so very-low-calorie foods aren’t overstated. It measures nutrition per calorie within our database — a useful guide, not a complete verdict on how “healthy” a food is.
Similar foods & swaps
The closest fruits to lemon by nutrition (per 100 g), and how each differs.
Questions
- How many calories are in lemon?
- A 1 undetermined wedge yields (6 g) serving of lemon has about 1 calories. Per 100 g, it has 22 calories — a very low calorie density.
- How much protein is in lemon?
- Lemon provides about 0 g of protein per 1 undetermined wedge yields (6 g) serving.
- What are the macros in lemon?
- Per serving, lemon has roughly 0 g protein, 0 g carbohydrate, and 0 g fat. By calories, that is 4% protein, 89% carbohydrate, and 7% fat.
- Is lemon high in protein?
- Lemon has a protein density of about 1.6 g per 100 kcal, and 4% of its calories come from protein. Foods above roughly 10 g per 100 kcal are generally considered protein-dense.
- What vitamins and minerals are in lemon?
- Lemon contains small amounts of several vitamins and minerals; see the full label above for the complete micronutrient breakdown.
- What is the nutritional value of lemon?
- Per 1 undetermined wedge yields (6 g), lemon has 1 calories, 0 g protein, 0 g carbohydrate, and 0 g fat. See the full nutrition facts label above for every vitamin and mineral.
Use it
More fruits
References & methodology
- Data source: U.S. Department of Agriculture, Agricultural Research Service — FoodData Central, FDC ID 167747 (public domain).
- Daily Values: FDA Nutrition Facts label, 2016 update (adults and children aged 4+).
- Source claims: a serving supplying 10–19% of the Daily Value is a “good source”; 20% or more is an “excellent source” (FDA, 21 CFR 101.54).
- Calorie split: Atwater general factors — 4 kcal/g for protein and carbohydrate, 9 kcal/g for fat.
- Last reviewed: June 2026. Values are typical figures and vary with variety, ripeness, and preparation.
NutriFactsHub. “Lemon Nutrition Facts.” https://nutrifactshub.com/foods/lemon