Pork Belly Nutrition Calculator — Calories & Nutrition per Serving

Raw pork belly has 518 kcal and 53g fat per 100g — compared to pork tenderloin at 120 kcal and 3.5g fat ^[1]. The belly delivers 4.3x the calories and 15x the fat of the leanest pork cut, from the same animal. This makes pork belly the highest-calorie cut in the entire pork carcass.

The protein content tells the other half of the story: pork belly has only 9.3g protein per 100g raw compared to tenderloin's 20.7g. Over 90% of pork belly's calories come from fat. A 3-oz (85g) serving provides just 7.9g protein — less than a single egg (6.3g), but at 440 kcal compared to the egg's 72 kcal ^[1].

Research on nutritional composition of different pork cuts has confirmed that belly-section adipose tissue can range from 45% to 65% of total tissue weight depending on the animal's breed, age, and feeding program — this wide range explains the significant calorie variation in pork belly across different sources ^[2].

Slow-roasting pork belly at low temperature (300°F for 2–3 hours) renders approximately 30–40% of the subcutaneous fat — the thick white layer between the skin and meat. However, the rendered fat typically collects in the roasting pan and is discarded, meaning the remaining meat is actually lower in fat per gram than raw ^[1].

Braised pork belly (kakuni, dongpo) renders fat into the braising liquid, which is partially consumed as sauce. The braised variant shows 480 kcal per 100g — lower than raw (518) or roasted (556) because the braising liquid dilutes the fat and some renders into the pot ^[1].

Crispy pork belly preparations (Chinese-style, lechon kawali, air-fried) dehydrate the skin at high heat while rendering some fat, but the high surface temperature creates a sealed crust that traps remaining fat inside the meat. This results in the highest calorie variant: approximately 575 kcal per 100g ^[3].

Pork belly is the raw, uncured source material for bacon. Fresh pork belly has 32mg sodium per 100g. Standard cured bacon has approximately 1,080mg sodium per 100g due to the salt-curing process ^[1].

Calorie density is surprisingly similar: raw pork belly at 518 kcal/100g vs. raw bacon at approximately 460–540 kcal/100g (varies by thickness and cure). The cure draws out moisture, concentrating both calories and sodium. After cooking, pan-fried bacon reaches approximately 540 kcal per 100g — comparable to roasted pork belly (556 kcal) ^[1].

For tracking: 3 strips of cooked bacon (approximately 25g) have about 135 kcal and 270mg sodium. A comparable 25g slice of roasted pork belly has about 139 kcal and only 9mg sodium. The calorie-per-gram is nearly identical, but the sodium difference is dramatic — fresh pork belly has 97% less sodium than bacon ^[2].

In Korean BBQ (samgyeopsal), pork belly is sliced thin (~5mm, approximately 30g per slice) and grilled at the table. Each thin slice has approximately 155 kcal and 15.9g fat using raw values, though grilling renders some fat away ^[1].

A typical Korean BBQ serving is 10–12 slices (300–360g raw) per person — approximately 1,550–1,860 kcal from the pork belly alone before adding rice, lettuce wraps, dipping sauces, and banchan sides. The total meal can easily reach 2,000–2,500 kcal per person ^[1].

For those tracking: log the raw weight of the pork belly slices before grilling. Some fat renders onto the grill and drips away, so the effective calorie intake may be 15–25% lower than raw values suggest. Using an adjusted figure of approximately 440 kcal per 100g raw served accounts for grilling losses while remaining conservative ^[3].

Pork belly has a distinctive five-layer structure: skin (collagen), subcutaneous fat, thin meat layer, another fat layer, and a deeper meat layer. The alternating layers are what make it visually distinctive and texturally unique — but they also make nutrition tracking complex ^[1].

The two fat layers comprise approximately 65–70% of the total cross-section by weight, while the two thin meat layers contribute only 20–25%. The skin (remaining 5–10%) is almost pure collagen, which provides protein but with a different amino acid profile than muscle meat — high in glycine and proline but low in essential amino acids ^[2].

If you eat only the meat layers and leave the visible fat (which some preparations allow you to separate), the calorie content drops dramatically to approximately 200–250 kcal per 100g of lean portions only. However, most preparations (crispy, braised, grilled) cook the layers together, making separation impractical ^[3].