Is 21 inch lawnmower profitable to sell on Amazon United States?

The niche generates $136K/yr across 53 tracked products. 14 of 18 products launched in the last 360 days are still selling. 90-day search growth is +136.8%. Flapen's verdict: Worth a look (58/100).

How competitive is the 21 inch lawnmower niche?

20 brands and 42 sellers compete. The top 5 products take 35% of clicks and top 5 brands hold 69% of demand.

What do buyers complain about in 21 inch lawnmower?

Top complaints mined from reviews: Battery Life, Durability, Quality-Overall. The return rate is 2.4%.

When does demand for 21 inch lawnmower peak?

Demand peaks in Apr–May–Jun–Jul; the busiest month runs 9.6× the quietest.

What does it cost to enter the 21 inch lawnmower niche?

Listings span $128.43–$812.55; the average listing price is $327.61 (sweet spot $15–$100). The average incumbent carries 965 reviews — the moat a new listing must climb.

21 inch lawnmower

Worth a look

Shows demand growing +136.8% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Growth

Incredible+136.8%

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

Quality gap

Great4.0★

avg incumbent rating — lower means beatable quality

Competition

Great35%

top-5 click share — an open shelf

Returns

Good2.4%

return rate — above 5% kills the launch gate

Review moat

Good965.32

avg incumbent reviews — the moat a new listing must climb

Brand share

Good69%

top-5 brand share — brands hold most of the demand

Market size

Okay$136K

$136K/yr · 58K searches

Avg price

Okay$327.61

avg listing price — sweet spot $15–$100

Conversion

Bad0.7%

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

Price range

Bad$128.43–$812.55

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

According to Flapen's Amazon United States niche tracking, 21 inch lawnmower is a $136K/yr Amazon United States market (58K searches/yr). The top 5 brands hold 69% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 58/100.

Data updated Jul 16, 2026 · scored weekly · How we score niches

21 inch lawnmower market data

Units sold / yr: 250–500; avg 0–100/product
Revenue / yr: $82K–$164K; units × avg price
Conversion rate: 0.7%
Avg BSR: #172
Page quality: 0%
Prime: 81%
Sponsored: 89%
Out of stock: 19.7%
Avg brand age: 33 months
Avg seller age: 142 days

Competition & brand share

Clicks spread well past the top 5 (35% combined) — an open shelf where new products get seen.

Brands

20 flat

Sellers

Top-5 brand share

69%

Top 20: 100%

Top-5 click share

35%

Top 20: 74%

Open market

24%

Greenworks36%
Skil10%
Stihl8%
WORX7%
EGO Power+7%
LiTHELi7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +136.8% search growth over the last 90 days.

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 9.6×

Open Trend

Top 21 inch lawnmower search terms

electric self propelled lawn mower21K/yr +107.8%0.9% conv.
cordless self propelled lawn mower10K/yr +255.4%0.6% conv.
stihl mower5K/yr +200.8%0.0% conv.
stihl lawn mower battery powered4K/yr +217.3%0.3% conv.
stihl electric lawn mower4K/yr +167.6%0.2% conv.
hart electric lawn mower4K/yr +81.8%0.2% conv.
yard force lawn mower4K/yr +81.6%0.1% conv.
lawnmower gas self propelled4K/yr +48.8%0.2% conv.
push gas lawnmower1K/yr +137.6%0.2% conv.
21 inch lawnmower531/yr +130.3%0.9% conv.

All search terms

Top 21 inch lawnmower 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

SKIL PWR CORE 40 Brushless 40V 20-Inch Self-Propelled Mower Kit Includes 6.0Ah Battery and Auto PWR JUMP Charger - SM4910C-11

Skil$345.134.5★159 rev

Stihl RME 235 1.2 kW 13 kg Lightweight Electric Lawn Mower with 33 cm Cutting Width With 30 Litre Grass Collection with Level Indicator

Stihl$374.514.3★60 rev

Greenworks 80V 21 Self-Propelled Cordless Lawn Mower Brushless Motor LED Lights 4.0Ah Battery & Rapid Charger (75+ Compatible Tools)

Greenworks$467.984.5★548 rev

Greenworks 40V 16 (Push) Cordless Lawn Mower 4.0Ah Battery (1/3 Acre Push Button Start Compatible with 75+ Tools)

Greenworks$228.074.2★12,027 rev

Greenworks 60V 21 Brushless (Self-Propelled) Cordless Lawn Mower 2 x 4.0Ah Batteries (3/4 Acre Rapid Charger 4-in-1 LED Lights IPX4)

Greenworks$477.884.5★582 rev

Newest

by launch date

40V Cordless Lawn Mower 17 Walk Behind Electric 4.0 Ah Battery Powered Lawnmower with 50L Grass Bag Brushless Motor 6 Adjustable Cutting Heights for Garden/Patio/Yark/Lawn

etoolab$205.4451 rev

2mo ago

Litheli 18-inch 40V Self-Propelled Brushless Lawn Mower for Garden Yards Lightweight Cordless Mower with 6-Position Height Adjustment 25.0Ah Batteries Included

LiTHELi$214.1120 rev

3mo ago

18 Electric Lawn Mower 40V Self-Propelled Cordless Mower with 2x5.0Ah Batteries & Type-C Cables Brushless Motor 2-in-1 Mulching & Bagging 6-Position Height Adjustment for Small to Medium Yards

KraftSense$199.2425 rev

4mo ago

Litheli Lawn Mower 18 Electric Self Propelled for Garden Yards Lightweight Cordless Lawn Mower Brushless with 6-Position Height Adjustment 2 x 20V 4.0Ah Battery

LiTHELi$232.8136 rev

1y ago

Litheli 18 Self-Propelled Lawn Mower 40V Battery Lawn Mower(2 x 5.0Ah) Push Mower with Brushless Motor 2-in-1 Mulching & Bagging

LiTHELi$192.77280 rev

1y ago

What buyers say about 21 inch lawnmower

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

What buyers love

Ease Of Use13%

“Easy to attach”

Weight Light10%

“Lightweight and easy to use”

Cutting/Trimming9%

“Cut great”

Value For Money9%

“Very affordable”

Battery Life8%

“Battery is good”

Quality-Overall8%

“Excellent product”

Assembly/Installation8%

“Assembly is simple”

Motor Power4%

“PLENTY of power”

Advertised Vs Actual Product3%

“AS DESCRIBED”

Charging3%

“Charges fast”

What buyers complain about

Battery Life19%

“Battery drained”

Durability8%

“broke after one use”

Quality-Overall7%

“Bad quality”

Functionality-Overall6%

“Didn't work”

Charging5%

“Can't hold charge”

Value For Money4%

“It's a little expensive”

Size-Overall4%

“it doesn't fit”

Ease Of Use3%

“Difficult to use”

Cutting/Trimming2%

“It does not cut evenly”

Weight Heavy2%

“Very heavy”

Top return reasons

Functionality-Overall17%

Battery Life16%

Size-Overall13%

Defective Material/Parts8%

Cutting/Trimming7%

Advertised Vs Actual Product6%