Energy
middle half299 kcalthis record per 100 g
- Corpus median
- 277 kcal
- Middle 50%
- 262–299 kcal
Based on 104 records reporting energy.
Breads & baked goodshigher variability
Bread, sour dough, toasted calories: 84 per 1 medium or regular slice (28 g)
This exact USDA record reports 84 calories for 1 medium or regular slice (28 g). That answer belongs to this description and weight; it is not a universal value for every meal that shares the name.
Quick facts
1 medium or regular slice · 28 g
- Calories
- 84 kcal
- Protein
- 3.3 g
- Carbohydrate
- 16 g
- Total fat
- 0.7 g
- Fiber
- 0.7 g
- Sodium
- 185 mg
Portion calculator
Estimate your portion
Choose a source measure or enter the weight you ate.
Estimated for 1 medium or regular slice · 28 g
84calories
Bread, sour dough, toasted
- Protein
- 3.3 g
- Carbs
- 16 g
- Fat
- 0.7 g
— means the source has no value available.
These values scale the selected reference food by weight. Ingredients, preparation, and portion size can change your meal’s estimate.
Nutrition facts, household measures, preparation notes and USDA sources
The editorial read
The useful answer has a weight, a composition, and an identity
Portion: the cited record reports about 84 calories for 1 medium or regular slice at 28 grams. On a fixed-weight basis, the same record contains 299 calories per 100 grams. The first number answers a portion question; the second answers a concentration question.
Composition: that source amount also reports 3.3 g protein, 0.7 g fiber, and 185 mg sodium. Read those values together: a calorie total by itself cannot describe the nutrient profile.
Identity: the largest listed formulation input is bread, french or vienna (includes sourdough), representing 100% of the record’s listed input weight. These are provenance for a standardized calculation, not a recipe for your plate.
The source calls its underlying survey portion “Quantity not specified,” but it separately lists 1 medium or regular slice at the identical weight. We use the familiar household label here without changing the source calculation.
The household measures attached to this record span roughly 7–117 calories across the listed portions. That is a set of scaled examples—not a confidence interval, a recommendation, or a claim about the full universe of recipes.
Calculated from the smallest and largest usable household measures listed by USDA for this exact FNDDS record; not a confidence interval.
Record-specific decision brief
What the numbers say—and what choice still belongs to you
This analysis belongs to USDA FDC 2707647: “Bread, sour dough, toasted.” It separates gram-weight arithmetic, corpus context, label signals, and record selection so one number does not have to answer four different questions.
01 · Portion arithmetic
Three weights, one fixed composition
For FDC 2707647, each row multiplies the published per-100-gram values by its stated weight. “1 cubic inch” through “1 large or thick slice” are weight scenarios: named measures come from USDA, while percentage labels are transparent arithmetic.
| Scenario | Weight | Energy | Protein | Fiber | Sodium |
|---|---|---|---|---|---|
| 1 cubic inchUSDA-listed household measure | 2.4 g | 7 kcal | 0.3 g | 0.1 g | 16 mg |
| 1 medium or regular sliceUSDA-listed household measure | 28 g | 84 kcal | 3.3 g | 0.7 g | 185 mg |
| 1 large or thick sliceUSDA-listed household measure | 39 g | 117 kcal | 4.6 g | 0.9 g | 258 mg |
02 · Fixed-weight context
Where 100 grams sits inside Yeast breads
The comparison set contains 104 exact records in the Yeast breads USDA category. Here, “middle half” describes FDC 2707647’s energy position in that corpus—not nutritional quality, desirability, or a health rating.
Protein
upper quarter11.8 gthis record per 100 g
- Corpus median
- 9.8 g
- Middle 50%
- 8.8–11.4 g
Based on 104 records reporting protein.
Dietary fiber
middle half2.4 gthis record per 100 g
- Corpus median
- 4 g
- Middle 50%
- 2.3–6.3 g
Based on 104 records reporting dietary fiber.
Sodium
upper quarter662 mgthis record per 100 g
- Corpus median
- 495 mg
- Middle 50%
- 447–585 mg
Based on 104 records reporting sodium.
03 · FDA label lens
The strongest strength-side and tradeoff-side signals
At FDC 2707647’s 28 g reference weight, the largest strength-side percentage among the nutrients evaluated here is Iron; the larger tradeoff-side percentage is Sodium. Percentages use FDA label Daily Values, whose general “high” guide begins at 20% Daily Value. This is not an overall score or a personalized target.
Strength-side signals
Iron1 mg
≈ 7% DV. This does not cross the FDA’s 20% ‘high’ guide.
Tradeoff-side signals
Sodium185 mg
≈ 8% DV. This does not cross the FDA’s 20% ‘high’ guide.
Saturated fat0.2 g
≈ 1% DV. This does not cross the FDA’s 20% ‘high’ guide.
04 · Highest-impact checks
The three levers most worth resolving first
For “Bread, sour dough, toasted,” the first-pass checks follow the evidence actually published: its named weights, the FDC 2707646 alternative, and its source-formulation identity.
- 01
Listed portion span: 1 cubic inch to 1 large or thick slice
USDA assigns those measures 2.4 g and 39 g. At this record’s fixed composition, scaled energy moves from 7 kcal to 117 kcal.
- 02
Record choice: compare with FDC 2707646
At an equal 100 g, this record has 27 kcal more calories than “Bread, sour dough.” That is a record-level contrast; it does not identify which ingredient caused the difference.
- 03
Single listed source: Bread, french or vienna (includes sourdough)
USDA derives this record from one listed source-input row at 100 g. Real preparations can still differ in water, cooking state, brand, and served weight.
05 · Exact-record choice
Select by literal evidence, not the shortest name
Keep this record when “sour dough; toasted” fits. Inspect FDC 2707646 when “sour dough” is the more literal description of the food and preparation.
Keep this profile when these fields fit
Bread, sour dough, toasted
- Exact source wording
- “Bread, sour dough, toasted”
- Source identity
- USDA FDC 2707647 · FNDDS 51133020
- Named qualifiers
- sour dough · toasted
Inspect this alternative when its fields fit better
Bread, sour dough
- Exact source wording
- “Bread, sour dough”
- Source identity
- USDA FDC 2707646 · FNDDS 51133010
- Named qualifiers
- sour dough
Choose the closest description
Which USDA record fits your meal?
Treat the long description as data. The phrases doing the most work here are “sour dough” and “toasted”. Match those details first; then compare the database weight with the amount you mean.
On smaller screens, focus a nutrition table and scroll horizontally to read every column.
| Exact record | Source serving | Calories / 100 g | Protein / 100 g | Fat / 100 g | Fiber / 100 g | Sodium / 100 g |
|---|---|---|---|---|---|---|
| This recordBread, sour dough, toasted | 28 g84 kcal | 299 kcal | 11.8 g | 2.7 g | 2.4 g | 662 mg |
| Bread, sour dough | 31 g84 kcal | 272 kcal | 10.8 g | 2.4 g | 2.2 g | 602 mg |
| Bread, Cuban, toasted | 18 g54 kcal | 299 kcal | 11.8 g | 2.7 g | 2.4 g | 662 mg |
| Bread, raisin, toasted | 25 g74 kcal | 297 kcal | 9.7 g | 3.6 g | 2.8 g | 448 mg |
| Bread, barley, toasted | 25 g75 kcal | 301 kcal | 11.7 g | 5 g | 4.4 g | 495 mg |
| Bread, oatmeal, toasted | 25 g74 kcal | 296 kcal | 9.2 g | 4.8 g | 4.4 g | 491 mg |
| Bread, white, toasted | 25 g73 kcal | 293 kcal | 10.4 g | 3.9 g | 2.5 g | 495 mg |
How to compare FDC 2707647: its source amount is 28 g; every 100-gram column removes portion size from the record-to-record comparison. Neither denominator determines your plate’s weight or recipe.
Household measures
Compare listed portions
For FDC 2707647, the 6 displayed measures scale the same source composition by gram weight; rounding changes presentation, not the underlying ratio.
1 small or thin/very thin slice
66 kcal
22 g
1 medium or regular slice
84 kcal
28 g
1 large or thick slice
117 kcal
39 g
1 slice, crust not eaten
39 kcal
13 g
1 slice, snack-size
27 kcal
9 g
1 cubic inch
7 kcal
2 g
At a glance
Nutrient signals in the source amount
For FDC 2707647, Sodium is the largest displayed non-protein Daily Value signal. Read the set as label context—not a personalized score.
Sodium
185.4 mg≈ 8% Daily ValueIron
1.2 mg≈ 7% Daily ValueThe percentages above apply to FDC 2707647’s 28 g reference amount. FDA Daily Values are general label references, not individualized energy or medical targets. Read the FDA explanation ↗
Why FDC 2707647 has no protein percentage here: Feast reports 3.3 g, but does not present grams divided by 50 as FDA protein %DV; applicable label rules account for protein quality and regulatory context.
Nutrition facts
Compare the source serving with 100 grams
Values are rounded for readability. The source serving is 28 g.
| Nutrient | Amount | Approx. % Daily Value |
|---|---|---|
| Calories | 84 kcal 299 kcal | Not established Not established |
| Protein | 3.3 g 11.8 g | Not shown Not shown |
| Carbohydrate | 16 g 57 g | 6% 21% |
| Total fat | 0.7 g 2.7 g | 1% 3% |
| Dietary fiber | 0.7 g 2.4 g | 2% 9% |
| Sugars | 1.4 g 5.1 g | Not established Not established |
| Sodium | 185.4 mg 662 mg | 8% 29% |
| Saturated fat | 0.2 g 0.6 g | 1% 3% |
| Monounsaturated Fat | 0.1 g 0.4 g | Not established Not established |
| Polyunsaturated Fat | 0.3 g 0.9 g | Not established Not established |
| Cholesterol | 0 mg 0 mg | 0% 0% |
| Potassium | 36.1 mg 129 mg | 1% 3% |
| Calcium | 16 mg 57 mg | 1% 4% |
| Iron | 1.2 mg 4.3 mg | 7% 24% |
| Magnesium | 9.8 mg 35 mg | 2% 8% |
| Vitamin C | 0 mg 0 mg | 0% 0% |
| Vitamin D | 0 µg 0 µg | 0% 0% |
| Vitamin A | 0 µg 0 µg | 0% 0% |
| Caffeine | 0 mg 0 mg | Not established Not established |
| Alcohol | 0 g 0 g | Not established Not established |
| Water | 7.4 g 26.4 g | Not established Not established |
For FDC 2707647, approximate percentages divide the displayed 28 g amount by FDA label Daily Values; they are not personalized targets. “Not established” means FDA sets no Daily Value for that row. Protein %DV remains unshown because adult-label use depends on regulatory context.
Inside the source record
Source formulation behind this USDA record
USDA links FDC 2707647 to one source input totaling 100 g in its standardized formulation. Publishing that exact provenance makes “Bread, sour dough, toasted” inspectable beside similarly named records.
How to read this
A single-source formulation
Bread, french or vienna (includes sourdough) is the only listed source input for this record. That does not mean every real-world version is identical; brands, preparation, water content, and portion weight can still differ.
100 g total listed input weight across the formulation.
| # | USDA input | Listed amount | Input weight | Share of listed input weight |
|---|---|---|---|---|
| 1 | Bread, french or vienna (includes sourdough)USDA ingredient 18029 · encyclopedia page available | 100 GM | 100 g | 100% |
Exact-record context
What makes this USDA record distinct?
For FDC 2707647, the close-record rule searches the USDA “Yeast breads” category for shared description terms or source inputs. Any surviving pair is compared per 100 grams, so unlike source-serving sizes cannot manufacture the nutrient difference.
This record
Bread, sour dough, toasted
- USDA category
- Yeast breads
- FDC ID
- 2707647
- FNDDS code
- 51133020
Closest inspectable record
Bread, sour dough
- USDA category
- Yeast breads
- FDC ID
- 2707646
- FNDDS code
- 51133010
| Nutrient | This record | Comparison record | Difference |
|---|---|---|---|
| Calories | 299 kcal | 272 kcal | +27 kcal |
| Protein | 11.8 g | 10.8 g | +1 g |
| Carbohydrate | 57 g | 51.9 g | +5.1 g |
| Total fat | 2.7 g | 2.4 g | +0.2 g |
| Dietary fiber | 2.4 g | 2.2 g | +0.2 g |
| Sodium | 662 mg | 602 mg | +60 mg |
Plain-English read
At the fixed 100-gram basis, this record lists 27 more calories than “Bread, sour dough.”
1 of the six displayed differences clears the documented materiality screen. It is a reading aid, not a health rating.
Formulation evidence
The listed formulations differ
The formulation rows differ, but the source data do not isolate which component caused any nutrient difference. Input weights describe the standardized formulation—not final plated proportions.
Shared listed inputs: Bread, french or vienna (includes sourdough).
The ingredient codes overlap, while at least one listed amount, weight, sequence, or formulation detail differs.
Portion evidence
The listed portion sets differ
This record’s reference amount is 28 g; a familiar listed measure is 1 medium or regular slice (28 g).
The comparison record’s reference amount is 31 g; a familiar listed measure is 1 medium or regular slice (31 g).
Use the 100-gram row to compare FDC 2707647 with FDC 2707646 at equal mass; use their 28 g and 31 g source amounts only for portion matching.
Evidence boundary: FDC 2707647 versus FDC 2707646 is a comparison of standardized source records—not a measurement of your meal, an overall food-quality rank, or proof that one input caused a difference.
Review the full yeast breads source category → Read the calculation and selection methodology →
From record to familiar meal
Guides that use this exact USDA record
These 1 guide place “Bread, sour dough, toasted” beside explicitly linked source records; use them to compare preparations without turning FDC 2707647 into a universal recipe.
Uncertainty, made actionable
What can change this estimate?
This is a standardized USDA survey-food profile, not a measurement of every preparation. Actual nutrition can change with item size, recipe or brand, moisture and density, spreads or toppings.
For “Bread, sour dough, toasted,” resolve item size first, then move through the remaining 3 published levers. Unknowns should remain visible rather than expanding every assumption at once.
- 01
item size
When composition is held constant, nutrient totals scale directly with grams. A 20% weight correction produces the same 20% correction to the scaled totals.
- 02
recipe or brand
Prefer a package, menu, or known recipe when it identifies the food more precisely. Otherwise preserve the generic record as an explicit approximation.
- 03
moisture and density
Match the food state before matching the number. Cooking, draining, or added liquid can change grams and concentration even when the food name barely changes.
- 04
spreads or toppings
Check whether the exact source description already includes it. If not, keep the addition separate rather than silently folding it into the base record.
How we estimated this
The arithmetic is simple; the provenance is the point
FDC 2707647 comes from FoodData Central Survey Foods (FNDDS). Its 299 kcal per 100 g becomes 84 kcal at 28 g through nutrient per portion = nutrient per 100 g × portion grams ÷ 100; this page adds no second nutrition estimate.
About the serving label: USDA describes the underlying survey portion as “Quantity not specified.” The separately listed 1 medium or regular slice has the same gram weight, so the familiar label can be shown without changing the calculation.
Data cycle: 2021–2023, published October 31, 2024
FoodData Central ID: 2707647
FNDDS food code: 51133020
The scaling for FDC 2707647 can be exact while the match to “Bread, sour dough, toasted” is wrong. That is why this profile keeps its 28 g weight, 1-row source formulation, and selection uncertainty beside the arithmetic.
Source release October 31, 2024. Review USDA’s data-type documentation ↗ · Read Feast’s full nutrition methodology.