The short answer
- Whole female crab = about $0.72/100g (median 1,047 KRW/100g). A 2.5kg jar sells for $15–$21 in real transactions.
- Frozen boneless gejang = about $3.82/100g — 5.3x more. But whole-crab weight includes shell and brine, so the gap isn't as wide as it looks.
- Discount percentages tell you nothing about value. Products with 50%+ discounts actually had a cheaper per-100g price than those with under 20% discounts ($0.69 vs $1.48/100g).
Ganjang gejang — raw crab marinated in soy sauce — is one of the most expensive Korean dishes a traveler can order in Seoul. A proper set meal at a famous gejang house runs $31–$40, which naturally makes you wonder: “What if I just bought a jar and ate it at my accommodation?” The problem is that online gejang listings are designed to make comparison shopping nearly impossible. Some sell 2.5kg jars, others 150g pouches. Some flash “60% OFF” in big red letters, but the base prices are all over the map.
So I counted. On July 29, 2026, I searched “간장게장” (ganjang gejang) on Coupang — Korea’s biggest e-commerce platform — and collected the price, weight, per-100g unit cost, and review count for every single one of the top 36 products sorted by sales volume. The numbers below are what those 36 listings tell us after grouping by product type.
So What's the Real Price of Ganjang Gejang Online in July 2026?
Depending on the product type, the price per 100g ranges from $0.35 to $5.07 — a 14x spread. The reason these don’t cluster into a single “market price” is simple: they’re fundamentally different products. The 36 listings split into four distinct categories.
📊 Price per 100g by product type — measured July 29, 2026 from Coupang's top 36 ganjang gejang listings
| Product type | Count | Median per 100g | Price range | Typical weight | Full jar price range |
|---|---|---|---|---|---|
| Whole female crab | 25 | $0.72 (1,047 KRW) | $0.35–$1.64 | 2–3kg | $9–$44 |
| Frozen boneless / flaked | 8 | $3.82 (5,572 KRW) | $3.08–$5.07 | 150–350g | $6–$26 |
| Yeosu stone crab | 2 | $0.74 (1,083 KRW) | $0.73–$0.75 | 3.5–5.5kg | $26–$40 |
| Soft-shell crab | 1 | $1.41 (2,063 KRW) | — | 650g | $9 |
For travelers, the real choice boils down to the first two rows: whole crab or boneless. And that 5.3x price gap is the most misunderstood number in this entire article.
Why Is Boneless Gejang 5x More Expensive Than Whole Crab?
Because the “per 100g” on each label measures something completely different. A 2.5kg whole-crab jar doesn’t contain 2.5kg of crab meat — it’s the combined weight of shells + meat + roe + soy brine. A 200g boneless pouch, on the other hand, is purely shelled meat.
So you can’t line up the whole crab’s $0.72/100g against the boneless $3.82/100g and call the boneless version a 5x rip-off. To compare fairly, you’d need to know what percentage of a whole crab jar is actually edible meat and roe — and that varies wildly depending on crab size and how much brine the seller uses.
Let's do the math
A typical 2.5kg whole-crab jar sells for a median price of $18 (26,005 KRW). If the edible portion (meat + roe) is roughly 25–30% of total weight — a reasonable estimate for flower crab — that gives you 625–750g of actual food. On that basis, the real unit cost is about $2.40–$2.88/100g (3,500–4,200 KRW/100g). The gap between whole crab and boneless shrinks from 5.3x to about 1.3–1.6x.
In other words, the premium on boneless gejang isn't a scam — you're paying for the labor of shelling and the eliminated waste. What you lose is the crab shell and roe that come with whole crab.
What Size Should You Buy?
2–3kg is the standard. Of the 25 whole-crab products, 17 (68%) cluster at 2.0kg, 2.5kg, or 3.0kg. This isn’t random — it means the market has settled on “enough for a family to eat twice” as the basic unit.
📦 Weight distribution of whole-crab products (25 items)
| Weight | Product count | Median per 100g | Price range |
|---|---|---|---|
| 1.0–1.5kg | 2 | $1.59 (2,325 KRW) | $16–$23 |
| 1.8–2.0kg | 8 | $0.70 (1,017 KRW) | $9–$27 |
| 2.5kg | 6 | $0.71 (1,040 KRW) | $16–$20 |
| 3.0kg | 5 | $0.86 (1,250 KRW) | $22–$44 |
| 4.0kg+ | 4 | $0.39 (569 KRW) | $15–$30 |
Two things stand out.
First, small jars under 1.5kg have the highest unit price ($1.59/100g). Buying small means paying more — and those products are all “freshly made” premium lines anyway, so the pricing logic is fundamentally different.
Second, 4kg+ bulk jars drop dramatically in unit price ($0.39/100g). But here’s the catch: those bulk products have only 33, 148, and 196 reviews respectively. The real bestsellers with 10,000+ reviews are all in the 2.5–3kg range. Cheap doesn’t mean popular.
Frozen vs Refrigerated — Is There a Price Difference?
You’re asking the wrong question. Of the 9 products labeled frozen, 7 were boneless small-pouch packs. Only 2 were whole-crab frozen items (Salgadeuk 2.5kg at $20 and WithFresh 1.8kg at $18).
❄️ Price per 100g by storage label
| Category | Count | Median per 100g | Notes |
|---|---|---|---|
| Labeled frozen | 9 | $3.76 (5,487 KRW) | 7 out of 9 are boneless packs |
| Not labeled (refrigerated) | 27 | $0.73 (1,067 KRW) | Mostly whole crab |
| — Frozen whole crab only | 2 | $0.90 (1,317 KRW) | Too few samples |
| — Refrigerated whole crab only | 23 | $0.72 (1,045 KRW) | Market baseline |
In practice, on Korean e-commerce, “frozen” doesn’t describe storage — it describes product format. Choosing frozen means choosing boneless small portions by default. Choosing refrigerated means choosing whole crab. The two frozen whole-crab products had a higher unit price ($0.90 vs $0.72) but with only 2 samples, you can’t generalize “frozen is more expensive.”
How to choose
- 1–2 people, eating in small amounts over time → Frozen boneless 150–250g ($6–$10). Thaw and throw on rice — done.
- 3–4+ people, want the full crab-shell experience → Refrigerated whole crab 2.5kg ($16–$20).
- Bulk 4kg+ jars → Half the unit price, but very few reviews. Not recommended for first-time buyers.
- If shelling feels like too much work → Soft-shell crab (edible shell) 650g at $9 is a solid middle ground.
Does "60% Off" Actually Mean a Good Deal?
No. The discount rate tells you about the product tier, not the value.
26 out of 36 products (72%) carried a discount tag. The median discount rate was 39%, and the maximum was 68%. But when we calculate the correlation between discount rate and actual per-100g price across the 22 whole-crab items that carried a discount, we get -0.52 — meaning higher discounts clearly correlate with a lower unit price.
Here’s what’s happening. Products with 60%-off tags tend to be mass-market, high-volume budget lines. Sellers set a high list price, then slash it to grab attention. Meanwhile, “freshly made” premium lines offer only 10–17% discounts but charge $1.48–$1.64/100g — more than double the price. Ignore the list price and the discount percentage. Just look at the price per 100g — Coupang helpfully displays this on every product page.
What Review Counts Tell You About the Real Market Price
The most reliable benchmark isn’t the calculated average — it’s what people are actually buying. Here are the top products by review count, which show you exactly where the market clusters.
If you line up the 9 whole-crab products with 1,000+ reviews by per-100g price, the pattern is clear: 972 · 1,107 · 1,140 · 1,250 · 1,283 · 2,161 · 2,163 · 2,260 · 2,390 KRW. That’s two distinct clusters. The first five are the $0.69–$0.89/100g mass-market tier — these are the real bestsellers. The last four are the $1.48–$1.64/100g premium-fresh tier. And the gap between $0.90 and $1.47/100g? Virtually empty.
Two price ranges to remember
- Mass-market tier = $0.69–$0.89/100g. 2.5kg for $16–$20. Products with 10,000+ reviews live here.
- Premium-fresh tier = $1.48–$1.64/100g. Smaller jars, lower discount rates.
- Under $0.41/100g is bulk-budget territory — products under 200 reviews. Don't buy just because it's cheap.
Restaurant vs Online — How Much More Are You Paying to Dine Out?
A famous Seoul ganjang gejang restaurant’s per-person set meal runs $31–$40 (45,000–59,000 KRW). Pro Ganjang Gejang’s female-crab two-piece course goes all the way up to $63 (92,000 KRW). Meanwhile, a 2.5kg whole-crab jar online has a median price of just $18 (26,005 KRW) — one restaurant portion buys you an entire jar with money left over.
🦀 Seoul gejang restaurant vs online whole-crab jar (July 2026, exchange rate 1,459.45 KRW/USD)
| Famous Seoul gejang house | Online whole-crab 2.5kg | |
|---|---|---|
| Price | $31–$40 per person | $16–$20 per jar |
| Portion | 1 serving (1 female crab + rice + sides) | 2.5kg total (multiple crabs + brine) |
| Crab quality | Fresh daily, consistent size | Lottery on size and roe content |
| Extras | Shell rice · banchan · hangover soup · refills | Nothing |
| Traveler access | Reservation needed, often sold out | Hotel delivery, needs fridge |
What this means for travelers
Think of the online price as a benchmark for judging whether restaurant pricing is reasonable, not as a viable alternative for a short trip. A Seoul gejang restaurant's $31–$40 per person looks steep, but that price covers fresh preparation, aging expertise, crab-shell rice, unlimited sides, and a bowl of hangover soup. Knowing that the raw ingredient itself costs about $6–$8 per serving lets you decide whether the rest is worth the experience.
For short-term visitors, ordering a refrigerated whole-crab jar to your hotel isn't practical. It needs fridge space, and raw marinated crab can't go in carry-on or checked luggage. If you want to bring some home, frozen boneless small packs (150–250g, $6–$10) are a much more realistic option — but even then, check your airline and destination country's customs regulations before buying.
If you’re planning to actually visit a gejang restaurant in Seoul, I’ve put together a separate guide on which places are famous for what and how much they charge.
🦀 See Seoul’s Top 8 Soy Crab Restaurants
What to Watch Out For When Buying
Buying checklist
- Only look at the price per 100g. The list price and discount rate are set to different baselines across products — they're not comparable.
- Check whether the weight is total weight. Whole-crab weight includes soy brine. Two 2kg jars can have very different actual crab content depending on how much brine was used.
- Avoid ultra-cheap bulk jars under 200 reviews. The $0.34–$0.41/100g products have very short sales histories.
- Confirm it's female crab (roe-filled). Top products all lead with am-ge (female crab) or albaegi (roe-packed) — the roe is what makes *gejang* special.
- It's raw, uncooked seafood. Skip it if pregnant or immunocompromised. Check storage temperature and expiration date on arrival.
Data and sources
- Price, weight, per-100g unit cost, and review count: Directly collected on July 29, 2026 from Coupang's top 36 "간장게장" search results sorted by sales volume — 25 whole crab, 8 boneless, 2 stone crab, 1 soft-shell crab.
- Median unit prices, weight distribution, and discount-rate correlation calculated from the raw 36-item dataset. Correlation based on 22 whole-crab products that carried a discount label.
- Exchange rate: 1 USD = 1,459.45 KRW (July 28, 2026, Frankfurter / ECB rate).
- Seoul restaurant price range: Based on the data in Seoul's Top 8 Soy Crab Restaurants guide.
- Online prices change hourly depending on coupons, membership discounts, and stock. The figures above are a snapshot as of July 29, 2026.