The Juice Calories Per Slice Calculator helps you see exactly what a glass, bottle, or splash of juice costs in calories, carbohydrates, and sugar. Many people drink juice while loosely estimating calories — but a small glass can range from 100 to 300 kcal depending on juice type, container size, and added sweeteners. This tool removes the guesswork by turning any portion of juice into a clear nutrition snapshot.
Pick a juice type, enter your slice volume (milliliters, fluid ounces, or cups), and optionally add sugar you stirred in. The calculator scales to any number of slices, making it easy to budget for a single serving, a whole pitcher, or a day's worth of juice. It's a handy companion for calorie counting, meal prep, and anyone curious about the real sugar content of their favorite morning drink. You can also compare options instantly with built-in portion presets for juice boxes, cans, and restaurant glasses.
🥤 Juice Nutrition Breakdown
➕ Added Sugar (optional)
How the Juice Slice Calculation Works
This tool treats one “slice” as one serving-sized portion of juice. You choose the juice type, enter how large your slice is (in milliliters, fluid ounces, or cups), and optionally add sugar. The calculator references average nutrition data for commonly consumed juices and applies simple proportional math:
Carbs and sugar follow the same proportional scaling, with added sugar counted in grams.
For example, if orange juice has 45 kcal per 100 ml and your glass holds 240 ml, the juice alone contributes 45 × 240 ÷ 100 = 108 kcal. If you stir in one teaspoon of sugar (about 4.2 g), add 17 kcal. The same logic scales across multiple slices, giving you a total for the whole pitcher, bottle, or day.
Reference Nutrition Values per 100 ml
Values are averaged from food-composition databases for unsweetened commercial juices. Always check the label of your exact product if you need precision.
| Juice Type | Calories (kcal) | Carbs (g) | Sugar (g) |
|---|---|---|---|
| Apple | 46 | 11.3 | 9.6 |
| Orange | 45 | 10.4 | 8.4 |
| Grape | 60 | 14.8 | 14.2 |
| Cranberry (unsweetened) | 46 | 12.2 | 11.0 |
| Pineapple | 53 | 12.9 | 9.9 |
| Grapefruit | 39 | 9.2 | 8.1 |
| Tomato | 17 | 3.5 | 2.6 |
| Carrot | 39 | 9.3 | 3.9 |
| Pomegranate | 54 | 13.1 | 11.9 |
| Mango nectar | 57 | 14.7 | 13.5 |
| Prune | 71 | 17.5 | 12.5 |
Sweetened juice drinks, nectars with added sugar, and blends can be 10–30% higher in calories. The calculator’s added-sugar field lets you account for table sugar stirred in at home; for store-bought sweetened products, choose an unsweetened base and add sugar to match the label’s “added sugars” line.
Worked Examples
These examples show why portion control matters: a small glass between 200 and 250 ml can still add 100–150 kcal before food even enters the equation.
Tips for Accurate Tracking
- Measure juice in a real measuring cup or use the bottle’s label volume rather than eyeballing.
- If you drink from a coffee mug or tall glass, remember those often hold 300–400 ml — much more than an 8-oz serving.
- Use the “12 oz can” and “16 oz bottle” presets to quickly see how commercial single-serve packages compare.
- For smoothies or juice blends, add the calories of each juice separately or use this tool for the liquid base and add fruit calories from a fruit nutrition calculator.
- Check whether your juice says “100% juice” or “juice drink”; the latter often contains added sugar and less actual juice.
Limitations & Accuracy Notes
Natural sugars in juice are still sugar: your body absorbs them quickly, which can affect blood sugar. The carb and sugar estimates are useful for diabetes management, but if you’re on a strict carb budget, check the nutrition facts panel on your specific bottle, because “100% juice” does not mean “no added sugar” in all countries and products.
Frequently Asked Questions
Is fruit juice healthy? Juice provides vitamins like vitamin C and potassium, but it lacks the fiber of whole fruit. For calorie control, whole fruit is usually more filling. This tool helps you see the calorie and sugar cost of juice as a beverage.
Can I use this for vegetable juice? Yes. Tomato juice and carrot juice have lower calorie densities (17 and 39 kcal per 100 ml respectively), and veggie blends are typically around 20 kcal per 100 ml. They are a lighter choice if you still want a savory juice.
Does “per slice” mean a fruit slice? In this calculator, a slice simply means one serving-sized portion of juice — typically 240 ml (about 8 oz). You can define any volume you like, so it works for a shot glass, a juice box, or a large restaurant glass.
How do I count juice calories in a mixed drink? Measure the juice part separately and use this tool for that volume, then add alcohol calories with a dedicated beverage calculator such as this drink calorie calculator.
Is added sugar worth tracking separately? Yes, because it raises both calories and glycemic load without adding nutrients. The calculator’s added-sugar field is a quick way to model a tablespoon of honey, agave, or table sugar.