Is california king profitable to sell on Amazon United States?

The niche generates $362K/yr across 156 tracked products. 59 of 73 products launched in the last 360 days are still selling. 90-day search growth is -9.2%. Flapen's verdict: Worth a look (53/100).

How competitive is the california king niche?

74 brands and 72 sellers compete. The top 5 products take 17% of clicks and top 5 brands hold 36% of demand.

What do buyers complain about in california king?

Top complaints mined from reviews: Size-Overall, Assembly/Installation, Durability. The return rate is 2.5%.

When does demand for california king peak?

Demand peaks in Dec; the busiest month runs 1.7× the quietest.

What does it cost to enter the california king niche?

Listings span $25.94–$825.71; the average listing price is $227.50 (sweet spot $15–$100). The average incumbent carries 7,267 reviews — the moat a new listing must climb.

california king

Worth a look

Shows a fragmented shelf (top 5 take 17% of clicks), but weak search conversion (0.7%) keeps it on the watch list.

Competition

Incredible17%

top-5 click share — an open shelf

Brand share

Incredible36%

top-5 brand share — no brand owns this niche

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Returns

Good2.5%

return rate — above 5% kills the launch gate

Market size

Good$362K

$362K/yr · 241K searches

Avg price

Okay$227.50

avg listing price — sweet spot $15–$100

Review moat

Bad7,266.53

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-9.2%

90-day search growth — must beat 0% to launch

Price range

Bad$25.94–$825.71

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Bad0.7%

search→purchase rate — share of searches ending in a sale

Signals No Dominant Brand High Price

According to Flapen's Amazon United States niche tracking, california king is a $362K/yr Amazon United States market (241K searches/yr). The top 5 brands hold 36% of demand. Demand peaks in Dec. Verdict: Worth a look — 53/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

california king market data

Units sold / yr: 1K–1K; avg 0–100/product
Revenue / yr: $228K–$284K; units × avg price
Conversion rate: 0.7%
Avg BSR: #647
Page quality: 0%
Prime: 65%
Sponsored: 94%
Out of stock: 13.0%
Avg brand age: 30 months
Avg seller age: 177 days

Competition & brand share

Clicks spread well past the top 5 (17% combined) — an open shelf where new products get seen.

Brands

74 rising

Sellers

Top-5 brand share

36%

Top 20: 67%

Top-5 click share

17%

Top 20: 39%

Open market

60%

LIKIMIO15%
LUMUNANCE7%
DICTAC6%
Amazon Basics5%
AMERLIFE4%
FANSACE4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -9.2% search growth over the last 90 days.

Peak months: Dec · busiest ÷ quietest = 1.7×

Open Trend

Top california king search terms

california king67K/yr -8.2%0.3% conv.
california king metal bed frame18K/yr +8.5%1.0% conv.
california king size bed14K/yr +5.7%0.1% conv.
cal king metal bed frame14K/yr +2.6%0.7% conv.
cali king bed13K/yr -0.9%0.1% conv.
camas california king9K/yr +2.5%0.2% conv.
california king platform bed frame with headboard8K/yr +16.8%0.1% conv.
clearance cal king bed frame10K/yr -17.4%0.2% conv.
california king beds9K/yr -10.7%0.1% conv.
california king bed frame wood8K/yr +2.9%0.2% conv.

All search terms

Top california king products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

LUMUNANCE Metal Bed Frame California King Size - 14 Inch Heavy-Duty Cal King Platform Bed Frame No Box Spring Needed Easy Assembly Noise-Free Sturdy Mattress Foundation Underbed Storage Space

LUMUNANCE$78.224.5★2,537 rev

Yaheetech Classic Metal Platform Bed Frame Mattress Foundation with Victorian Style Iron-Art Headboard/Footboard/Under Bed Storage/No Box Spring Needed/California King Size Black

Yaheetech$144.294.5★15,659 rev

California King Size Mattress (High-End Upgraded) Hotel-Level Luxury 14 Inch Hybrid Cal King Mattress In A Box Cooling-Gel Memory Foam & Pocket Springs Extra Edge Support 365-Night Trial Medium Firm

FANSACE$453.594.0★26 rev

LIKIMIO California King Bed Frames Storage Headboard with Charging Station Solid and Stable Noise Free No Box Spring Needed Easy Assembly

LIKIMIO$169.554.5★9,605 rev

Amazon Basics Memory Foam Mattress Soft Plush Feel Breathable California King White/Grey 84 x 72 x 12 inches (LxWxH)

Amazon Basics$330.744.4★7,948 rev

Newest

by launch date

California King Size Mattress (High-End Upgraded) Hotel-Level Luxury 14 Inch Hybrid Cal King Mattress In A Box Cooling-Gel Memory Foam & Pocket Springs Extra Edge Support 365-Night Trial Medium Firm

FANSACE$453.5926 rev

today

GarveeHome Cal King Bed Frame with Adjustable Headboard Modern Linen Upholstered Platform Bed Frame with Wood Slats Support No Box Spring Needed Easy Assembly for Bedroom Apartment Beige

GarveeHome$151.90199 rev

3mo ago

DICTAC California King Bed Frame with Bookcase Headboard

DICTAC$239.2215 rev

4mo ago

LIKIMIO California King Bed Frame with Storage Headboard and LED Lights Metal Platform Bed with Charging Station Noise Free No Box Spring Needed Under Bed Storage Natural and Cream

LIKIMIO$181.18120 rev

5mo ago

BYSAUD California King Bed Frames Cal King Bed Frame with Storage Headboard & Hidden Space Platform Bed Frame with LED Lights & Charging Station No Noise No Box Spring Needed Dark Gray Linen

BYSAUD$128.86274 rev

7mo ago

What buyers say about california king

What buyers praise and complain about, mined from review topics.

What buyers love

Assembly/Installation15%

“Easy Assembly”

Comfort-Overall12%

“Comfortable and supportive mattress”

Strength10%

“Sturdy frame”

Quality-Overall10%

“Amazing quality”

Value For Money8%

“Great buy”

Size-Overall6%

“It is indeed true to size”

Soft Feel6%

“Feels smooth, comfortable”

Advertised Vs Actual Product4%

“As described”

Foam2%

“soft like it has that true memory foam feel”

Storage Capacity2%

“lots of storage”

What buyers complain about

Size-Overall11%

“Inaccurate size”

Assembly/Installation9%

“Difficult to put together”

Durability8%

“Broke”

Quality-Overall7%

“Awful quality”

Strength4%

“less sturdy than expected”

Thickness4%

“Not nearly as thick”

Advertised Vs Actual Product3%

“False advertisement”

Height3%

“Height IS NOT true”

Value For Money3%

“Not recommended for the price”

Instructions/User Manual/Troubleshooting3%

“No instructions”

Top return reasons

Size-Overall35%

Height11%

Advertised Vs Actual Product9%

Color8%

Material Quality4%

Defective Material/Parts4%

Comfort-Overall3%

Assembly/Installation2%

Quality-Overall2%

Value For Money2%

Common questions

Is california king profitable to sell on Amazon United States?: The niche generates $362K/yr across 156 tracked products. 59 of 73 products launched in the last 360 days are still selling. 90-day search growth is -9.2%. Flapen's verdict: Worth a look (53/100).
How competitive is the california king niche?: 74 brands and 72 sellers compete. The top 5 products take 17% of clicks and top 5 brands hold 36% of demand.
What do buyers complain about in california king?: Top complaints mined from reviews: Size-Overall, Assembly/Installation, Durability. The return rate is 2.5%.
When does demand for california king peak?: Demand peaks in Dec; the busiest month runs 1.7× the quietest.
What does it cost to enter the california king niche?: Listings span $25.94–$825.71; the average listing price is $227.50 (sweet spot $15–$100). The average incumbent carries 7,267 reviews — the moat a new listing must climb.