Limes are prized for their bright, tangy flavor, but they contribute very little protein. A 100 g portion of raw lime contains roughly 0.7 g of protein, and a typical whole lime supplies less than half a gram. For anyone tracking macros, that number is usually negligible — but it still adds up when limes appear in marinades, juices, and dressings.
This tool estimates lime protein however you measure it: whole fruit, halves, wedges, cups of raw pieces, or tablespoons of fresh juice. It also shows how that protein fits into a standard 50 g daily reference intake and lets you adjust the protein density for a specific product or brand.
Whether you are meal planning, logging food, or simply curious about citrus nutrition, this calculator gives you a fast, realistic answer.
Lime Protein Calculator
Estimate protein in whole limes, lime pieces, or fresh juice — and see how it fits your daily protein goal.
How to Use This Tool
Start by choosing the unit that matches how you are actually eating limes: whole fruit, halves, wedges, grams, cups of raw pieces, or tablespoons of fresh juice. Then enter the amount in the input box and click "Calculate protein." The calculator instantly shows the total protein, the whole-lime equivalent, the percentage of the daily reference value, and the protein density used in the calculation.
The tool applies a standard raw-lime protein density of 0.7 g per 100 g. If you are working with a specific product — a bottled lime juice, a lime-flavored drink, or a packaged ingredient — use the "Protein density" field to override the default with a value from the nutrition label. The food form dropdown automatically swaps between raw lime (0.7 g per 100 g) and fresh lime juice (0.42 g per 100 g), saving you from looking up separate values.
How It Works
The calculation is a simple three-step conversion. First, the calculator converts your chosen unit into grams using a standard portion weight. Second, it multiplies that weight by the protein density, expressed as grams of protein per 100 g of food. Third, it expresses the result as a percentage of the FDA's Daily Value of 50 g of protein for an adult on a 2,000-calorie diet.
Protein (g) = amount × grams per unit × density ÷ 100
For example, one wedge of lime weighs about 5 g. At 0.7 g protein per 100 g, a single wedge provides 5 × 0.7 ÷ 100 = 0.035 g of protein — roughly 0.07% of the daily value. The portion weights used in this tool are taken from USDA FoodData Central averages and are slightly rounded for clarity.
Worked Examples
Example 1 — Two whole limes: 2 × 67 g = 134 g. Protein = 134 × 0.7 ÷ 100 = 0.94 g, which is about 1.9% of a 50 g daily target.
Example 2 — One cup of raw lime pieces: 114 g × 0.7 ÷ 100 = 0.80 g of protein.
Example 3 — Two tablespoons of lime juice: about 30 g at 0.42 g per 100 g = 0.13 g of protein.
Example 4 — Half a lime: 33.5 g × 0.7 ÷ 100 = 0.23 g. Even a generous squeeze of half a lime barely registers on a macro tracker.
Reference Data
The values below are typical averages for raw lime and lime juice, based on USDA FoodData Central entries. Individual fruits vary with size, variety, and ripeness, so treat these as close approximations rather than exact figures.
| Item | Weight | Protein |
|---|---|---|
| Whole lime | 67 g | 0.47 g |
| 1 cup raw pieces | 114 g | 0.80 g |
| 1 tbsp lime juice | 15.2 g | 0.06 g |
| 100 g raw lime | 100 g | 0.70 g |
| 100 g lime juice | 100 g | 0.42 g |
For comparison, lemon juice contains about 0.4 g of protein per 100 g, and a raw lemon provides about 1.1 g per 100 g — both still negligible for protein goals but slightly higher than lime.
Common Mistakes to Avoid
Don't confuse juice weight with whole-fruit weight. A cup of lime juice is heavier than a cup of raw pieces and has a different protein density (0.42 vs 0.7 g per 100 g). Always match the food form to the unit you selected.
Don't use whole-lime weight for juice amounts. If a recipe calls for 30 mL of lime juice, that is about 30 g of juice, not 30 g of whole lime. Using the wrong base weight can roughly double your estimate.
Don't forget to update the density for packaged products. Bottled lime juice, lime concentrate, and lime-flavored drinks often contain added sugars, preservatives, or other ingredients that change the protein content. Check the label and enter the per-100 g value manually.
Frequently Asked Questions
Are limes a good source of protein? No — limes are prized for bright acidity and vitamin C, not protein. Even a generous serving contributes well under 1 g, so for protein goals you should look elsewhere.
Why is the daily value based on 50 g? The FDA sets a Daily Value of 50 g of protein for adults on a 2,000-calorie diet. Your personal target may differ based on body weight, activity level, and goals; treat the percentage as a relative guide rather than a personal recommendation.
Can I use this for lemons or other citrus? The portion weights and densities here are lime-specific. Lemons are similar but slightly higher in protein (about 1.1 g per 100 g), and other citrus fruits differ as well. Enter the correct density for the fruit you are using.
Why does the tool show a whole-lime equivalent? It helps you visualize the contribution of your serving in everyday terms. For example, 2 tablespoons of juice (0.13 g) is roughly a quarter of a whole lime's protein (0.47 g).
Does cooking or juicing affect the protein? Juice concentrates the water-soluble components of the fruit, which is why the density of juice differs from raw flesh. Cooking does not destroy protein, but it can change the water content and therefore the protein density per 100 g.
Nutrition values are approximations from USDA FoodData Central; actual values vary slightly by variety and ripeness.