Lemonade seems like a simple drink — water, lemons, and sugar — but the nutrition numbers change dramatically depending on how much juice and sweetener actually go into the pitcher. This calculator converts your own recipe into a clear per-serving snapshot of calories, carbohydrates, total and added sugars, vitamin C, and potassium, so you always know what is really in your glass.
Whether you're meal prepping for a picnic, tracking macros, or simply trying to cut back on added sugar, you can start from a quick preset such as Classic, Light, or Unsweetened, then fine-tune the lemon-to-sugar ratio until it matches your goals. Measure the lemons as whole fruit or tablespoons of juice, sweetener by teaspoon, tablespoon, cup, or gram, and the batch in cups, fluid ounces, quarts, or liters.
Results include a step-by-step breakdown so you can see exactly how serving size changes the totals and how your homemade pitcher compares with store-bought lemonade. No account or sign-up needed — just your recipe.
📊 Per-Serving Results
🧮 Step-by-Step Breakdown
Quick Start
Choose a preset — Classic, Light, or Unsweetened — to load a familiar recipe, then adjust any field to match your own pitcher. You can enter lemon as whole medium lemons or tablespoons of juice, sweetener as teaspoons, tablespoons, cups, or grams, and volumes in cups, fluid ounces, quarts, or liters. Press Calculate Nutrition to update the per-serving results. The breakdown below the results shows every conversion step, so you can verify the math or adapt it to a different serving size.
The presets are only starting points. For a fruitier lemonade, add more lemon; for a less tart drink, reduce the juice and top up with water. Because the calculator treats the batch volume as fixed, adding water changes the dilution and therefore the per-serving numbers.
How the Numbers Are Calculated
The calculator converts all ingredients to common base units before applying the serving fraction. One medium lemon is treated as 2 tablespoons of juice, and 1 cup of granulated sugar is treated as 200 g. Per-tablespoon averages for lemon juice come from USDA FoodData Central: roughly 3.3 kcal, 0.38 g sugar, 5.8 mg vitamin C, and 15.5 mg potassium. Granulated sugar contributes 4 kcal per gram, and every gram of it counts as added sugar.
The serving fraction is serving volume divided by total batch volume. Every nutrient total is multiplied by this fraction, so results reflect the exact serving size you entered rather than a fixed 8-fluid-ounce measure. For example, if the batch is 7 cups and your serving is 12 fl oz, the fraction is 12 ÷ 56 = 0.214 since 7 cups equals 56 fl oz. Increase the serving to 16 fl oz and the fraction becomes 0.286.
Carbohydrates are reported as total sugars because lemonade contains very little starch or fiber. Added sugars are shown separately so you can track the sweetener you control; the difference between total and added sugars is the natural sugar from the lemons.
Worked Examples
Example 1 — Classic pitcher: 6 lemons, 1 cup sugar, 7-cup batch, 1-cup serving. Lemon juice = 12 tbsp. Sugar = 200 g. Batch calories = (12 × 3.3) + (200 × 4) = 39.6 + 800 = 839.6 kcal. Serving fraction = 236.6 ÷ 1656.1 ≈ 0.143. Per serving ≈ 120 kcal, 29.8 g total sugars, 27.9 g added sugars, 9.9 mg vitamin C, and 26.6 mg potassium.
Example 2 — Bigger serving: same pitcher but a 12 fl oz glass. Serving fraction = 354.9 ÷ 1656.1 ≈ 0.214. Per serving ≈ 180 kcal and 45 g total sugars. This shows how much serving size matters.
Example 3 — Unsweetened: 6 lemons, no sugar, same batch. Per serving only about 4.7 kcal and 0.65 g sugar, mostly vitamin C and a little potassium.
Tips & Common Mistakes
- Don't double-count lemon juice: it contains natural sugar, which belongs in total sugars but not in added sugars.
- Weigh the sweetener in grams when you can; cup and spoon measures vary with crystal size and packing.
- This calculator assumes granulated sugar. Honey, agave, and maple syrup are slightly more calorie-dense per tablespoon (about 60 kcal vs 48 kcal).
- Store-bought lemonades often use high-fructose corn syrup; calorie counts are similar but sweetness differs.
- Use the breakdown to scale recipes: if you only have 4 lemons, the juice amounts update automatically.
Reference Values
| Ingredient | Amount | Calories | Sugars |
|---|---|---|---|
| Lemon juice | 1 tbsp | 3.3 kcal | 0.38 g |
| Granulated sugar | 1 tsp | 16 kcal | 4 g |
| Granulated sugar | 1 cup | 800 kcal | 200 g |
| Classic lemonade | 1 cup | ~120 kcal | ~30 g |
These are estimates; actual lemons vary in size, juiciness, and sugar content. For medical or dietary planning, check the USDA FoodData Central database or consult a registered dietitian.