Whole wheat bread calories 100g 247
A clear, evidence-aware answer to how many calories are in 100 g of whole wheat bread, with slice math and practical portion guidance.
Written by Victura Nutrition TeamReviewed by Victura Editorial ReviewLast updated Oct 22, 2026
Quick answer
For this page, 100 g of whole wheat bread provides 247 kcal. That is about 3.5 oz. A typical 28 g (1 oz) slice has about 69 kcal, while a 43 g (1.5 oz) slice has about 106 kcal. Check your label because recipes and slice weights vary.
A clear, evidence-aware answer to how many calories are in 100 g of whole wheat bread, with slice math and practical portion guidance.
Key takeaways
- 100 g of whole wheat bread contains 247 kcal, about 3.5 oz.
- A 28 g (1 oz) slice has about 69 kcal; slice size changes the math.
- 247 kcal per 100 g is typical for sandwich bread, not unusually high.
- Weigh slices and log spreads separately for more accurate calories.
- Whole wheat bread can fit most diets when portions and toppings are managed.
Scientific overview: whole wheat bread calories per 100 g
Research-backedQuick answer: 247 calories per 100 g
The core figure for this page is 247 kcal per 100 g of whole wheat bread. In US household terms, 100 g is about 3.5 oz, or roughly 3 to 4 thin slices depending on slice weight. Always check the label because density, slice size, and added ingredients vary.
| Portion | Weight | Calories |
|---|---|---|
| 1 small slice | 28 g (1 oz) | about 69 kcal |
| 1 large slice | 43 g (1.5 oz) | about 106 kcal |
| 100 g | 100 g (3.5 oz) | 247 kcal |
| 2 small slices | 56 g (2 oz) | about 138 kcal |
Key takeaway: At 247 kcal per 100 g, a typical 28 g (1 oz) slice has about 69 kcal; portion size is the main calorie lever.
How to translate 100 g into real slices
Bread slices are not standardized. A small slice may weigh 28 g (1 oz), while a large slice may weigh 43 g (1.5 oz) or more. The calories change with weight, not with the number of slices.
- 28 g (1 oz) slice: about 69 kcal.
- 35 g (1.2 oz) slice: about 86 kcal.
- 43 g (1.5 oz) slice: about 106 kcal.
- 56 g (2 oz) two-slice sandwich: about 138 kcal.
If your label gives a 45 g (1.6 oz) slice, one slice is about 111 kcal. Two of those 45 g (1.6 oz) slices are about 222 kcal before spreads. That is why weighing slices once can make logging more predictable.
Is 247 calories per 100 g high for bread?
247 kcal per 100 g is a typical sandwich-bread figure. Dense seeded loaves, cheese breads, and artisan loaves can be higher, while some light or airy sandwich breads are lower. Calories alone do not make a bread healthy or unhealthy.
For weight management, the portion and toppings matter more than the per-100-g number. A two-slice sandwich using 28 g (1 oz) slices starts at about 138 kcal before spreads, cheese, egg, or avocado. Those extras can add more calories than the bread itself.
- Use smaller slices for everyday toast.
- Measure calorie-dense spreads by tablespoon, such as 1 tbsp (15 g) of nut butter.
- Build sandwiches with vegetables, lean protein, or beans.
- Compare breads by calories per 100 g rather than per slice.
Whole wheat vs white bread and blood-sugar context
Calories per 100 g can be similar for whole wheat and white bread, but the recipes still differ. Whole wheat bread usually contains more whole grain and fiber, though the amount varies by brand. Check the label for fiber, sodium, added sugar, and serving weight.
The glycemic index (GI) is not fixed for all whole wheat bread. GI values vary with flour texture, recipe, added sugars, and what you eat with the bread. If you monitor blood sugar, use product-specific data and pair bread with protein, fat, or fiber; this is general education, not medical advice.
- Look for '100% whole wheat' or 'whole grain' as a first ingredient.
- Compare fiber per 100 g, not just the front-of-pack claim.
- Watch sodium if you eat bread daily.
- Log the actual weight of your slice when precision matters.
Community insights: logging whole wheat bread calories
Community insightHow people use the 247 kcal figure
In Victura meal logs, bread most often appears in sandwiches, toast, and meal-prep plates, and the logged slice weights vary widely from kitchen to kitchen. That is why the 247 kcal per 100 g figure is most useful when you also know your slice weight. Logging by grams is more consistent than logging by 'one slice' because loaves vary so much.
- Weigh one slice from a new loaf, then reuse that weight for the rest of the loaf.
- Use the label serving weight when a scale is not available.
- Log spreads, cheese, and oils separately; they often outweigh the bread calories.
- Keep a favorite slice weight in your app for faster logging.
Portion examples for common meals
A quick way to use the number is to build meals around the bread weight you actually eat. These examples are estimates, not product-specific labels.
- Toast: 1 small slice (28 g / 1 oz) plus 1 tbsp (15 g) nut butter.
- Lunch sandwich: 2 small slices (56 g / 2 oz) plus protein and vegetables.
- Snack plate: 1 large slice (43 g / 1.5 oz) cut into quarters.
- Party tray: halve each small slice; one half is about 14 g (0.5 oz).
Practical buying and label tips
Whole wheat bread labels can be confusing. Look for whole grain flour early in the ingredient list and compare the nutrition panel per 100 g. If two breads have similar calories, choose based on fiber, sodium, texture, and how you will use it.
- Compare calories, fiber, and sodium per 100 g.
- Check slice weight; a 'thin' slice may still be dense.
- Store bread so it stays fresh and you waste less.
- Use the freezer for partial loaves to control portions.
For more help, explore Victura's food database, our whole grains guide, and the bread calorie calculator.
References
- USDA FoodData Central(usda)
- FDA Nutrition Facts Label(fda)
- PubMed peer-reviewed literature(pubmed)
- Victura anonymized meal logs(victura)
Frequently asked questions
People also ask
How many calories are in 100g of whole wheat bread?
For this page, 100 g of whole wheat bread provides 247 kcal. That is about 3.5 oz. A typical 28 g (1 oz) slice has about 69 kcal, while a 43 g (1.5 oz) slice has about 106 kcal. Check your label because recipes and slice weights vary.
Is 247 calories per 100g a lot for bread?
It is within the usual range for sandwich-style bread. Dense seeded or artisan loaves may be higher, while lighter sandwich breads may be lower. The more useful question is how much you eat per sitting and what you put on it.
How many calories are in one slice of whole wheat bread?
One slice depends on weight. At 247 kcal per 100 g, a 28 g (1 oz) slice has about 69 kcal; a 43 g (1.5 oz) slice has about 106 kcal. Weigh a slice from your loaf for the most accurate number.
Is whole wheat bread good for weight loss?
It can fit a weight-loss plan, but calories still count. A two-slice sandwich using 28 g (1 oz) slices starts around 138 kcal before spreads, fillings, or oil. Choose portions that match your budget and pair with protein, vegetables, and fiber-rich foods.
What is the glycemic index of whole wheat bread?
There is no single GI for all whole wheat bread. Values vary with recipe, flour texture, added sugars, and how the bread is eaten. If you monitor blood sugar, use product-specific data and pair bread with protein, fat, or fiber; this is general education, not medical advice.
Is whole wheat bread healthier than white bread?
Whole wheat bread usually provides more whole grain and fiber than white bread, though recipes vary. Calories per 100 g can be similar, so compare the label for fiber, sodium, added sugar, and serving weight. The better choice depends on your overall diet and preferences.
How can I measure 100g without a scale?
A kitchen scale is most accurate. Without one, use the label slice weight: about 3.5 slices of a 28 g (1 oz) loaf, or about 2.3 slices of a 43 g (1.5 oz) loaf, can approach 100 g. Treat that as an estimate because slice thickness varies.
Does toasting change the calories?
Toasting drives off water, so a toasted slice weighs less than the same slice fresh, but it does not remove calories. The slice still carries the calories it had before toasting. The simplest approach is to log the fresh (untoasted) weight, or to use the label's stated calories per slice. If you only have a toasted weight, note that calories per gram rise as water leaves, so applying the fresh-bread figure to the lighter toasted weight will undercount. Do not assume toasting removes calories.
How many calories are in 100g of whole wheat bread?
100 g of whole wheat bread provides 247 kcal, which is about 3.5 oz. A typical 28 g (1 oz) slice has about 69 kcal, while a 43 g (1.5 oz) slice has about 106 kcal. Check your label because recipes and slice weights vary.
How many calories are in one slice of whole wheat bread?
It depends on slice weight. At 247 kcal per 100 g, a 28 g (1 oz) slice has about 69 kcal and a 43 g (1.5 oz) slice has about 106 kcal. Weigh a slice from your loaf for the most accurate number.
Is 247 calories per 100g a lot for bread?
It is within the usual range for sandwich-style bread. Dense seeded or artisan loaves may be higher, while lighter sandwich breads may be lower. Portion size and toppings matter more than the per-100-g figure.
How we review this guide
- Written by
- Victura Nutrition Team
- Reviewed by
- Victura Editorial Review
- Reference sources
- 6
- Last updated
- Oct 22, 2026
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