Spinach is famously low in fat, but exactly how much fat you get depends on how you prepare it and how much you eat. This calculator converts your spinach portion into a precise fat-per-100g figure, whether you're tracking raw leaves, cooked servings, or frozen blocks. It's ideal for anyone following a low-fat diet, counting macros, or simply curious about the nutritional profile of this leafy green.
Simply enter your portion weight and choose the preparation type — raw, boiled, steamed, or frozen — and the tool will instantly show the fat content per 100g, along with the total fat in your portion and a quick comparison to common foods. You'll also see a step-by-step breakdown so you can verify the math yourself. Perfect for meal planning, diet logging, and nutrition education.
🥬 Spinach Fat Calculator
How to Use This Tool
Enter the weight of your spinach portion in grams or ounces, select the preparation method (raw, boiled, steamed, or frozen), and click Calculate. The tool instantly shows the fat content per 100g, the total fat in your portion, and a step-by-step breakdown of the math. Use the quick-fill buttons to load common portion sizes like a 30g handful of raw leaves or a 180g cooked cup.
For the most accurate tracking, weigh your spinach on a kitchen scale rather than estimating by volume. If you're logging a recipe, add the fat from any cooking oils or dressings separately — this calculator only accounts for the spinach itself.
How It Works
The fat content is based on standard USDA FoodData Central values for each preparation:
- Raw spinach: 0.39 g fat per 100g
- Boiled (drained): 0.26 g fat per 100g
- Steamed: 0.26 g fat per 100g
- Frozen (cooked): 0.37 g fat per 100g
These values reflect the natural fat in spinach, which is almost entirely polyunsaturated and monounsaturated fats. Cooking methods that involve added fat (like sautéing in butter or oil) will increase the total fat content significantly, so always account for added fats separately.
The calculation is straightforward: convert your portion to grams, then multiply by the fat-per-100g value divided by 100. For example, a 150g serving of raw spinach contains (150 ÷ 100) × 0.39 = 0.585 g of fat.
Worked Examples
Example 1: You eat a 2-cup raw spinach salad (about 60g). Fat = (60 ÷ 100) × 0.39 = 0.23 g.
Example 2: You have a 200g serving of boiled spinach. Fat = (200 ÷ 100) × 0.26 = 0.52 g.
Example 3: A 4 oz (113g) portion of frozen cooked spinach. First convert: 4 oz × 28.35 = 113.4g. Fat = (113.4 ÷ 100) × 0.37 = 0.42 g.
Tips & Best Practices
- Weigh spinach raw before cooking for the most consistent tracking, since water loss during cooking concentrates nutrients.
- If you're on a very low-fat diet, remember that spinach's fat is negligible — the bigger concern is often the dressing or cooking oil.
- Use the per-100g figure to compare spinach with other leafy greens. For instance, kale has about 0.9g fat per 100g, while romaine has about 0.3g.
- For meal prep, calculate the fat for the entire batch and divide by the number of servings to get per-serving values.
Factors Affecting Accuracy
The values used are averages from the USDA and can vary slightly depending on the spinach variety, growing conditions, and exact cooking time. Boiling can leach a small amount of fat-soluble nutrients into the water, but the effect on fat content is minimal. Frozen spinach often has slightly higher fat because it's typically harvested at peak maturity and may retain more of its natural oils.
If you're tracking for medical reasons, always consult the nutrition label on packaged spinach or use a professional nutrition database for the most precise numbers.
Frequently Asked Questions
Is spinach really fat-free? No food is completely fat-free, but spinach is extremely low in fat — less than 0.5g per 100g in most preparations. It's considered a low-fat food by any standard.
Does cooking spinach change its fat content? Cooking itself doesn't add or remove fat, but it changes the water content. Boiled spinach has slightly lower fat per 100g because it absorbs water, diluting the fat concentration. Sautéing with oil, however, adds fat.
Can I use this calculator for baby spinach? Yes, baby spinach has a very similar fat profile to mature spinach. The difference is negligible for tracking purposes.
How does spinach compare to other vegetables? Spinach is among the lowest-fat vegetables. For comparison, broccoli has about 0.4g, carrots 0.2g, and avocado (a fruit) has 15g per 100g. This makes spinach an excellent choice for low-fat diets.
Additional Resources
For more detailed nutritional data, visit the USDA FoodData Central database, which provides comprehensive nutrient profiles for thousands of foods. You can also check the Nutrition.gov website for general dietary guidance.