Wondering how many calories are in a slice of beet? This calculator converts the size and thickness of your beet slices into accurate calorie estimates using the vegetable's typical density and standard nutrition values.
Whether you are meal-prepping roasted beets, adding raw slices to a salad, or tracking boiled beet slices for a low-calorie side, this tool gives you per-slice and per-batch totals in seconds. It accounts for slice thickness, beet diameter, and preparation method, so your estimate stays realistic.
Just enter your slice dimensions, choose how the beets were prepared, and hit calculate. You will also see helpful breakdown details like grams per slice, volume, and how many slices make up roughly 100 g.
🥕 Beet Slices Calorie Calculator
Estimate calories in sliced beets based on slice dimension, thickness, and preparation.
Slice Dimensions
Preparation
Volume per slice: — cm³
Weight per slice: — g
Calories per slice: — kcal
Slices per 100 g: —
How to Use This Tool
Start by entering the number of slices you plan to eat. Then set the slice thickness in millimetres and the average diameter of the beet in centimetres. If your slices are uneven, use an average thickness and diameter rather than a perfect measurement. Next, choose the preparation method from the dropdown — raw, boiled, or roasted — because cooking changes the calorie density slightly. Press Calculate Calories to see the total calorie estimate, calories per slice, weight per slice, and how many slices you would need to reach 100 g. The quick-fill preset buttons for thin, medium, and thick slices, and for small, medium, and large beets, let you test common scenarios in one click.
How the Calculation Works
Each beet slice is treated as a short cylinder. The tool first calculates slice volume using the formula:
Volume = π × (diameter ÷ 2)² × thickness
It then multiplies volume by the density of raw beet, about 1.05 g/cm³, to get the weight of one slice. Because beets are about 87% water, their density is very close to water, so volume in cubic centimetres is a good proxy for weight in grams. Finally, the calculator applies the calorie value for the selected preparation:
- Raw beet: ~43 kcal per 100 g
- Boiled beet: ~44 kcal per 100 g
- Roasted beet: ~50 kcal per 100 g (estimate; varies with added oil)
Multiplying per-slice calories by the slice count gives your batch total. This method is far more accurate than guessing based on slice count alone, because a 2 mm slice and a 10 mm slice weigh very differently.
Worked Examples
Example 1 — Thin salad slices: 4 slices, 3 mm thick, 6 cm diameter, raw.
Radius = 3 cm; volume ≈ π × 9 × 0.3 ≈ 8.5 cm³; weight ≈ 8.9 g; calories per slice ≈ 8.9 × 0.43 ≈ 3.8 kcal; total ≈ 15.3 kcal.
Example 2 — Chunky roasted rounds: 6 slices, 8 mm thick, 8 cm diameter, roasted.
Radius = 4 cm; volume ≈ π × 16 × 0.8 ≈ 40.2 cm³; weight ≈ 42.2 g; calories per slice ≈ 42.2 × 0.50 ≈ 21.1 kcal; total ≈ 126.6 kcal.
Notice that the thicker, larger roasted slices contain more than five times the calories of the thin salad slices. Serving size matters more than beet variety when you are tracking intake.
Reference Values for Beets
The table shows approximate nutrition figures per 100 g of edible beet, based on standard food-composition data.
| Form | Calories | Carbs | Protein | Fat |
|---|---|---|---|---|
| Raw | 43 kcal | 9.6 g | 1.6 g | 0.2 g |
| Boiled | 44 kcal | 10.0 g | 1.7 g | 0.2 g |
| Roasted (est.) | 50 kcal | 11 g | 1.8 g | 0.6 g |
If you need a full carbohydrate or fat breakdown for meal planning, see the beet carbs per 100g calculator or the beet fat calculator.
Tips for Accurate Estimating
- Measure the diameter at the widest point; beets taper toward the tip, so use an average if the shape is irregular.
- If you use a mandoline, verify the blade setting by slicing one test piece — thickness settings can drift between uses.
- For odd-shaped slices, weigh one slice on a kitchen scale once and compare it with the calculator to fine-tune your personal estimate.
- Remember that raw and cooked beets shrink or soften; weight changes slightly with cooking method, but the calorie effect is small for typical servings.
Frequently Asked Questions
Are beet calories the same for every slice size? No. Calories scale with weight. A large thick slice can easily be four to five times heavier than a thin small slice, so using weight or accurate dimensions is important.
Should I count beet juice? No. Juice released during boiling or steaming is mostly water with trace nutrients; the calories lost are negligible for a normal serving.
Can I use this for pickled beets? The calculator is calibrated for raw, boiled, and roasted beets. Pickled beets often contain added sugar, so their calories are higher and vary by brand. Weigh them separately or check the product label.