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Portions and preparation · USDA nutrition

Crab calories per cup: 112 across 2 of 3 named USDA examples

Across 2 of 3 named USDA examples, a cup contains 112 calories. Each included example lists 135 g for that measure. The same household label can carry a different gram weight elsewhere in USDA data. The remaining 1 specifically named example does not list that exact household measure.

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Preparation and portion

Named measures come from this exact source record.

Estimated for 85 g

71calories

Crab

Protein
15.2 g
Carbs
0 g
Fat
0.6 g

These values scale the selected reference food by weight. Ingredients, preparation, and portion size can change your meal’s estimate.

FoodData Central Survey Foods (FNDDS) · FDC 2706344 Full nutrition profile →

Compare all 3 food records, nutrition tables and USDA sources

The 3 exact records in this guide report 71–182 calories in the records' own listed source servings and 83–214 calories per 100 grams. Those are observations from named database records—not a universal range or an estimate of an unseen plate.

Match my meal

Start with the description closest to what you ate

For Crab, begin by separating “Crab” from “Crab, canned.” Choosing a card filters this source set; it does not infer the portion or fill in ingredients the chosen description does not name.

Showing all 3 linked records.

Equal-weight view

How crab records compare at 100 grams

All 3 cited records are shown at the same 100-gram weight. The source servings may differ.

  1. Crab 83 kcal
    83 kcal
  2. Crab, canned 83 kcal
    83 kcal
  3. Crab, cake 214 kcal
    214 kcal

Shared basis: 100 g · kilocalories

What this page compares

Named source records, not one universal meal

This guide keeps 3 named USDA records in view: 3 direct matches. They span 2 source categories, including Shellfish and Seafood mixed dishes. The exact descriptions remain the unit of comparison; the familiar heading is only the doorway into the evidence.

Why these records appear together: The deterministic grouping rule “normalized first description segment” placed these 3 records together under the exact grouping key “crab.” That rule determines membership before any nutrition result is read.

For Crab, this page can compare 3 named records from FDC 2706344 through FDC 2706345. It cannot observe which preparation was eaten, recover unnamed additions, or supply the eaten grams.

Read the shared calculation, provenance, and uncertainty method →

Editor’s decision brief

The three facts to carry into the table

Carry the denominator, exact identity, and strongest observed contrast into every number below.

Portion

A shared 85 g comparison anchor

Equal source weights make the selected Crab serving totals easier to compare, but the eaten portion still has to be measured or estimated.

Composition

131 kcal separates the fixed-weight endpoints

The lower endpoint is “Crab”; the higher is “cake.” This isolates density, not ingredient causation.

Discriminator

168 mg sodium gap per 100 g

Of protein, fiber, and sodium, the strongest normalized contrast is between “Crab” (395 mg) and “canned” (563 mg).

Observed source examples

Three landmarks inside this source set—not universal endpoints

These 3 records each use a 85 g serving. Their serving calories compare equal weights within this set. They do not define a calorie range for every crab; match the preparation and adjust to your portion.

Important: “Lower” begins with Crab; “higher” ends with Crab, cake, using each record’s own source amount. Those labels order this selected set only—they are not endpoints for every crab meal.

Full comparison

Compare every selected FNDDS record

For Crab, serving columns preserve each record’s own listed amount, while calories per 100 g hold weight constant. A dash means the cited record does not supply that field; it does not mean the nutrient is absent.

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USDA records selected for the Crab nutrition guide
Exact source record Match Source amount Calories kcal / 100 g Protein Fiber Sodium USDA
Crab Direct name match 85 gUSDA reference amount 71 kcal 83 15.2 g 0 g 336 mg FDC 2706344 ↗
Crab, cake Direct name match 85 gUSDA reference amount 182 kcal 214 12.2 g 0.3 g 366 mg FDC 2706549 ↗
Crab, canned Direct name match 85 gUSDA reference amount 71 kcal 83 15.2 g 0 g 479 mg FDC 2706345 ↗

Portion analysis

Serving total and calorie density answer different questions

Every selected record uses a 85-gram source amount, so serving-weight differences do not explain the calorie spread inside this set. Their own source servings run from 71 calories for “Crab” to 182 for “cake.” At a fixed 100 grams, “Crab” is 83 calories and “cake” is 214—a fixed-weight separation of 131 calories. For Crab, the serving view answers “how much is in the database portion?”; the 100-gram view answers “how concentrated is the matched record?” Neither reveals how many grams were actually eaten.

The scaling rule: multiply a per-100-gram value by eaten grams ÷ 100. The arithmetic is exact; the result is only as defensible as the record match and portion estimate.

Preparation analysis

The long description carries the evidence

The published descriptions distinguish forms such as “Crab”, “cake”, and “canned”. The source formulations contain 8 distinct ingredient codes; examples that appear in only part of the set include crustaceans, crab, blue, cooked, moist heat, bread, crumbs, dry, grated, plain, crustaceans, crab, blue, canned, and eggs, grade a, large, egg whole. On this Crab page, those rows make the records inspectable, but they are not a controlled experiment: they cannot tell us that one named input, by itself, caused a nutrient difference.

Database precision is not meal certainty. Retain the exact description beside the number so later corrections remain possible.

What changes the comparison

Four drivers worth checking before choosing a record

The family label “Crab” cannot resolve the differences between Crab and Crab, canned. The four checks below identify the record wording, source weight, and formulation evidence that can.

  1. 01

    A shared source weight

    Every selected record uses 85 grams. Inside this set, serving-calorie differences therefore reflect the published composition rather than a change in source weight.

  2. 02

    The words that split the family

    Representative record-level distinctions include “Crab”, “cake”, and “canned”. Those phrases are evidence for choosing a record, not decorative subtitle text.

  3. 03

    Formulation evidence, with limits

    8 source-input codes appear across the selected records. Their presence and listed weights describe USDA formulations, not finished plated proportions.

  4. 04

    The unresolved plate

    Even “Crab” leaves the eaten grams and unnamed oils, sauces, toppings, substitutions, or leftovers unresolved. Preserve those Crab unknowns for correction instead of converting them into false precision.

Record matching

Match identity first; scale quantity second

Read the source name as a sequence of decisions. First confirm that crab is the right meal family. Then resolve the phrases that actually separate this set—“Crab”, “cake”, and “canned”—before comparing gram weight. If a package, menu, or known recipe provides a closer first-party description, prefer it and keep this USDA record as a transparent fallback.

A practical matching checklist

  1. Read the complete Crab source description, including preparation and additions.
  2. Compare the listed source weight with the amount actually eaten.
  3. Prefer a current package or restaurant source when a specific branded item is known.
  4. Record toppings, sauces, cooking fat, sides, and substitutions that the selected description does not name.

Decision support from the exact records on this page

Turn source data into a better next decision

These conclusions and reading paths are computed from 3 exact records behind Crab source-record guide. Links are chosen by record identity, controlled contrast, formulation input, nutrient spread, or serving context—not by loose keyword similarity.

Equal-weight result

Crab, cake is higher in carbohydrate per 100 g

Crab, cake reports 4.5 g versus 0 g for Crab: a 4.5 g difference when both are normalized to 100 g.

Inspect the underlying evidence

These listed servings have equal weights

3 listed servings each weigh 85 g

The 3 records with a listed serving weight on this page each use 85 g. Their serving totals therefore compare equal weights, even if the household labels differ. Match the preparation and adjust the weight to the amount you eat.

Choose the record before reading the number

Crab and Crab, canned are not interchangeable

The page keeps both records at the same 100 g denominator and makes Source form (No matching controlled term in the source name versus canned) the explicit record-description contrast. It does not show that the wording difference caused a nutrient difference. Pick the description that matches the food in front of you rather than averaging away the distinction.

Inspect the underlying evidence

Contextual knowledge graph

Follow the relationship that matches your question

For Crab source-record guide, each path states why the destination belongs here, so you can distinguish a true evidentiary connection from a merely similar label.

Compare two records on this page Crab vs Crab, canned

Both records appear in this page’s evidence set. The explicit record-description contrast is Source form: No matching controlled term in the source name versus canned; it is a selection cue, not evidence of cause.

Follow this evidence path A formulation detail that separates records Crustaceans, crab, blue, cooked, moist heat

USDA input 15140 appears in 2 of 3 context records; its summed listed input weight spans 65–100 g across those source formulations. These are source-formulation input weights, not plated or serving weights. Follow the code to inspect every represented occurrence.

Follow this evidence path A formulation detail that separates records Bread, crumbs, dry, grated, plain

USDA input 18079 appears in 1 of 3 context records; its summed listed input weight spans 5–5 g across those source formulations. These are source-formulation input weights, not plated or serving weights. Follow the code to inspect every represented occurrence.

Follow this evidence path 2 context records in this source topic Shellfish

Crab and Crab, canned belong to this USDA source-category collection. Its displayed ranges and complete exact-record catalog provide the peer set for a manual comparison; the destination does not preselect this page’s record.

Follow this evidence path Put the observed spread in corpus context Calories: density and serving context

In this page’s records, calories runs from 83 kcal in Crab to 214 kcal in Crab, cake, all per 100 g.

Follow this evidence path 1 context record in this source topic Seafood mixed dishes

Crab, cake belongs to this USDA source-category collection. Its displayed ranges and complete exact-record catalog provide the peer set for a manual comparison; the destination does not preselect this page’s record.

Follow this evidence path Inspect an exact record Crab

Open the full nutrient table, household measures, formulation inputs, and FoodData Central 2706344 citation for this exact record—not a name-level average.

Follow this evidence path