40 ft extension cord
Skip itStrong incumbent ratings (4.8★) — this niche doesn't clear our bar today.
Price range
Incredible$15.22–$35.51cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great$21.35avg listing price — sweet spot $15–$100
Conversion
Great9.9%search→purchase rate — share of searches ending in a sale
Returns
Good2.5%return rate — above 5% kills the launch gate
Growth
Good+31.3%90-day search growth — must beat 0% to launch
Brand share
Okay85%top-5 brand share — brands hold most of the demand
Review moat
Bad5,570.3avg incumbent reviews — the moat a new listing must climb
Market size
Bad$74K$74K/yr · 35K searches
Competition
Bad79%top-5 click share — a locked-up shelf
Quality gap
Bad4.8★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, 40 ft extension cord is a $74K/yr Amazon United States market (35K searches/yr). The top 5 brands hold 85% of demand. Demand peaks in Nov–Dec. Verdict: Skip it — 44/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
40 ft extension cord market data
- Units sold / yr
- 4K–5K
- avg 250–500/product
- Revenue / yr
- $85K–$107K
- units × avg price
- Conversion rate
- 9.9%
- Avg BSR
- #263
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 60%
- Out of stock
- 7.7%
- Avg brand age
- 55 months
- Avg seller age
- 192 days
Competition & brand share
The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 flat
Sellers
10
Top-5 brand share
85%
Top 20: 100%
Top-5 click share
79%
Top 20: 100%
Open market
8%
- GE35%
- UltraPro17%
- huanchain16%
- Tiffcofio9%
- Conable7%
- Elecan7%
- Open — no brand owns it (3 brands, 8%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +31.3% search growth over the last 90 days.Peak months: Nov, Dec · busiest ÷ quietest = 2.0×
Top 40 ft extension cord search terms
- 40 ft extension cord12K/yr
- 40ft extension cord6K/yr
- 40 foot extension cord6K/yr
- extension cord 40 ft5K/yr
- 40 extension cord3K/yr
- 40 ft outdoor extension cord3K/yr
Top 40 ft extension cord 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.
All 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
GE Outdoor Extension Cord 40 Ft Grounded Heavy Duty Extension Cord 16AWG 3 Prong Outdoor Extension Cord ETL Listed Green 81601
GE$16.484.8★2,473 rev
UltraPro Outdoor Extension Cord 40 Ft Heavy Duty Extension Cord ETL Certified 3 Prong 16 AWG 125 VAC Outdoor Multipurpose Long Power Cord 1 Pack Black 36826
UltraPro$19.514.8★14,193 rev
HUANCHAIN Indoor Outdoor Black Extension Cord 50 ft Waterproof 16/3 Gauge Flexible Resistant Appliance Extension Cord Outside 13A 1625W 16AWG SJTW 3 Prong Electric Cable ETL Listed
huanchain$18.424.7★6,268 rev
TiFFCOFiO Indoor Outdoor Extension Cord Waterproof 40 Feet 3 Prong Power Cord for Home and Garden 16 AWG 13A/1625W ETL Listed
Tiffcofio$25.804.8★136 rev
3-Outlet Flat Extension Cord 40 FT 16 Gauge Extension Cord Flat Plug Multi Outlet 3 Prong Angled Plug SPT-3 Power Strip Indoor Extension Cable ETL Listed White
Conable$25.994.7★161 rev
Newest
by launch dateTiFFCOFiO Indoor Outdoor Extension Cord Waterproof 40 Feet 3 Prong Power Cord for Home and Garden 16 AWG 13A/1625W ETL Listed
Tiffcofio$25.80136 rev
3-Outlet Flat Extension Cord 40 FT 16 Gauge Extension Cord Flat Plug Multi Outlet 3 Prong Angled Plug SPT-3 Power Strip Indoor Extension Cable ETL Listed White
Conable$25.99161 rev
GE Outdoor Extension Cord 40 Ft Grounded Heavy Duty Extension Cord 16AWG 3 Prong Outdoor Extension Cord ETL Listed Green 81601
GE$16.482,473 rev
Skrizcable 16/3 50 FT Outdoor Extension Cord Waterproof Weatherproof & Flame Retardant Black 3 Prong Power Cord Outside for Lawn & Garden 13 Amps 1625 Watts 125 VAC 16AWG SJTW ETL Listed
Skrizcable$20.045,828 rev
Outdoor Extension Cord 40 Ft with 3 Outlets 14/3 SJTW 3 Prong Grounded Power Cord 14 Gauge 14AWG Heavy Duty Power Cable ETL Listed 15 Amp 125 V 1875 W-Multiple Outlets for Indoor/Outdoor-Black
Elecan$35.51831 rev
Trending
90-day click momentumTiFFCOFiO Indoor Outdoor Extension Cord Waterproof 40 Feet 3 Prong Power Cord for Home and Garden 16 AWG 13A/1625W ETL Listed
Tiffcofio$25.804.8★
3-Outlet Flat Extension Cord 40 FT 16 Gauge Extension Cord Flat Plug Multi Outlet 3 Prong Angled Plug SPT-3 Power Strip Indoor Extension Cable ETL Listed White
Conable$25.994.7★
GE Outdoor Extension Cord 40 Ft Grounded Heavy Duty Extension Cord 16AWG 3 Prong Outdoor Extension Cord ETL Listed Green 81601
GE$16.484.8★
Skrizcable 16/3 50 FT Outdoor Extension Cord Waterproof Weatherproof & Flame Retardant Black 3 Prong Power Cord Outside for Lawn & Garden 13 Amps 1625 Watts 125 VAC 16AWG SJTW ETL Listed
Skrizcable$20.044.7★
Power By GoGreen Go Green Power Inc. 16/3 50ft Black Outdoor Extension Cord - Durable Heavy Duty Moisture Resistant - Ideal for Tools & Equipment - GG-13750BK
Power By GoGreen$15.224.8★
What buyers say about 40 ft extension cord
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality cord”
“Works as advertised”
“Decent value”
“Durable”
“Nice extension cord”
“Good tan color”
“Sturdy plug ends”
“Works great”
“Heavy duty”
“it is indeed flexible”
What buyers complain about
“Not of quality construction”
“Cord overheats”
“I probably could have found a cheaper one in a store”
“Didnt last 2 months”
“hard to unwind”
“Thin and weak”
“The 25 feet one was to short for what I needed”
“Flimsy”
“50 feet can only get me so far I shouldve measured”
“just today I smelled something burning”
Top return reasons
Common questions
- Is 40 ft extension cord profitable to sell on Amazon United States?
- The niche generates $74K/yr across 10 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +31.3%. Flapen's verdict: Skip it (44/100).
- How competitive is the 40 ft extension cord niche?
- 9 brands and 10 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 85% of demand.
- What do buyers complain about in 40 ft extension cord?
- Top complaints mined from reviews: Quality-Overall, Heating, Value For Money. The return rate is 2.5%.
- When does demand for 40 ft extension cord peak?
- Demand peaks in Nov–Dec; the busiest month runs 2.0× the quietest.
- What does it cost to enter the 40 ft extension cord niche?
- Listings span $15.22–$35.51; the average listing price is $21.35 (sweet spot $15–$100). The average incumbent carries 5,570 reviews — the moat a new listing must climb.