Shark IW4621UKT Review | 52 Data compared

Avg. price:~£240Suction power (AW):150 AWBattery runtime:60 minutesCapacity:0.42 LWeight:2.9 kg

Shark IW4621UKT Review: Compare 52 technical specifications and user reviews to see how this product ranks in the Vacuum Cleaners category and whether it is worth buying.

7.9

Overall score

Score
7.9/ 10
✕
What it is
An overall evaluation of the vacuum cleaner's quality, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best vacuum cleaners on the market.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

80%

7.8

Technical Score

20%

8.4

User score

â–²Better than 87% of vacuum-cleaners
7.8

Technical Score

Technical score
7.8/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

28%

6.5

Performance

22%

8.0

Battery

18%

8.0

Filtration

14%

9.2

Attachments

10%

7.3

Design

8%

9.4

Smart features

â–²Better than 84% of vacuum-cleaners
8.4

User score

User score
8.4/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.6

User ratings

30%

7.8

Number of reviews

Based on 577 buyer reviews from online shops.
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–²Better than 77% of vacuum-cleaners
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Verdict

The Shark Detect Clean & Empty Cordless Pet Vacuum Cleaner IW4621UKT is a 240W stick vacuum weighing 3.01kg that features a 0.42L onboard dustbin and a bagless 2L auto-empty base holding up to 45 days of debris. It offers up to 60 minutes of runtime via an 18V lithium-ion battery, a 5-hour charge time, and utilizes three intelligent sensing technologies—DirtDetect, EdgeDetect, and FloorDetect—to dynamically adjust suction power and its QuadClean Anti Hair Wrap brush-roll. Main advantages include its ultra-lightweight design, effective automated suction adjustments, complete anti-allergen HEPA sealing, and the convenience of a self-emptying, self-charging dock that includes a motorized pet tool. However, it suffers from a small onboard bin capacity, a slightly above-average noise level of 82dB, and a basic LED display instead of a precise percentage readout.

Technical Specifications of vacuum cleaner Shark IW4621UKT

Technical Score
Technical score
7.8/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

28%

6.5

Performance

22%

8.0

Battery

18%

8.0

Filtration

14%

9.2

Attachments

10%

7.3

Design

8%

9.4

Smart features

7.8
Shark IW4621UKT has a technical score of 7.8 points, which is higher than 84.2% of vacuum cleaners.
User score
User score
8.4/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.6

User ratings

30%

7.8

Number of reviews

Based on 577 buyer reviews from online shops.
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
8.4
Shark IW4621UKT has a user score of 8.37 points, which is higher than 76.6% of vacuum cleaners.
Popularity
Popularity
7.8/ 10
✕
What it is
An indicator based on the number of reviews received by the vacuum cleaner.
When it matters
When you prefer a vacuum cleaner that has been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
Popularity:
Shark IW4621UKT has a popularity score of 7.8 points, which is higher than 69.6% of vacuum cleaners.
7.8
Shark IW4621UKT has a popularity score of 7.8 points, which is higher than 69.6% of vacuum cleaners.
Ratio quality/price
Value for money
8.3/ 10
✕
What it is
An indicator that combines the vacuum cleaner's overall score with its price.
When it matters
When you are looking for a vacuum cleaner with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

60%

7.9

Overall score

40%

9.3

Price

8.3
Shark IW4621UKT has a value-for-money score of 8.3 points, which is higher than 88% of vacuum cleaners.
Suction power (AW)
150 AW
Suction power (AW)
150 AW
This vacuum cleaner has a suction power of 150 AW, which is higher than that of 43.9% of vacuum cleaners and equal to that of 11.1% of vacuum cleaners.
Suction power (kPa)
16.81 kPa
Suction power (kPa)
16.81 kPa
This vacuum cleaner has a suction pressure of 16.81 kPa, which is lower than that of 69.6% of vacuum cleaners and equal to that of 0.2% of vacuum cleaners.
Airflow
?
Motor type
digital
Power consumption
240 W
Power consumption
240 W
This vacuum cleaner draws 240 W, which is lower than the power consumption of 81.4% of vacuum cleaners and equal to that of 1.5% of vacuum cleaners.
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Cordless
yes
Cordless
yes
This vacuum cleaner works cordlessly. 49.5% of vacuum cleaners offer cordless operation.
Battery runtime
60 minutes
Battery runtime
60 minutes
This vacuum cleaner offers a battery runtime of 60 minutes, which is longer than that of 62.8% of vacuum cleaners and equal to that of 22.8% of vacuum cleaners.
Charging time
5 hours
Charging time
5 hours
This vacuum cleaner charges in 5 hours, which is slower than 73.8% of vacuum cleaners and equal to 20.4% of vacuum cleaners.
Battery capacity
?
Battery voltage
18 V
Battery voltage
18 V
This vacuum cleaner uses a battery voltage of 18 V, which is lower than that of 79.8% of vacuum cleaners and equal to that of 16% of vacuum cleaners.
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Filter class
hepa
Filter class
hepa
This vacuum cleaner uses filter class hepa, which is more advanced than the class used by 16% of vacuum cleaners and the same as the class used by 46% of vacuum cleaners.
Minimum overall efficiency
99.97%
Minimum overall efficiency
99.97%
This vacuum cleaner reaches 99.97% minimum overall efficiency, which is higher than that of 59.1% of vacuum cleaners and equal to that of 19.4% of vacuum cleaners.
Suitable for allergy sufferers
yes
Suitable for allergy sufferers
yes
This vacuum cleaner is suitable for allergy sufferers. 82.4% of vacuum cleaners are allergy-friendly.
Capacity
0.42 L
Capacity
0.42 L
This vacuum cleaner has a dust capacity of 0.42 L, which is smaller than that of 90.2% of vacuum cleaners and equal to that of 0.3% of vacuum cleaners.
Bagless
yes
Bagless
yes
This vacuum cleaner uses a bagless design. 78.6% of vacuum cleaners use this setup.
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Main brush type
roll brush
Roller type
multi-surface
Anti-tangle brush
yes
Anti-tangle brush
yes
This vacuum cleaner includes an anti-tangle brush. 25.7% of vacuum cleaners include this feature.
Mini motorized brush
yes
Mini motorized brush
yes
This vacuum cleaner includes a mini motorized brush. 26.9% of vacuum cleaners include this attachment.
Suitable for pet owners
yes
Suitable for pet owners
yes
This vacuum cleaner is suitable for pet owners. 72% of vacuum cleaners handle pet hair well.
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Vacuum type
stick
Weight
2.9 kg
Weight
2.9 kg
This vacuum cleaner weighs 2.9 kg, which is lower than the weight of 64.6% of vacuum cleaners and equal to that of 1.3% of vacuum cleaners.
2-in-1 design
yes
2-in-1 design
yes
This vacuum cleaner offers a 2-in-1 design. 53% of vacuum cleaners offer this flexible format.
Self-standing
no
Self-standing
no
This vacuum cleaner does not stand on its own. 18.9% of vacuum cleaners offer this convenience.
Adjustable tube height
no
Adjustable tube height
no
This vacuum cleaner does not include adjustable tube height. 47.4% of vacuum cleaners offer this ergonomic feature.
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Auto suction adjustment
yes
Auto suction adjustment
yes
This vacuum cleaner supports automatic suction adjustment. 19.9% of vacuum cleaners support this feature.
Dust particle sensor
yes
Dust particle sensor
yes
This vacuum cleaner includes a dust particle sensor. 8% of vacuum cleaners include this feature.
LED display
yes
LED display
yes
This vacuum cleaner includes an LED display. 25.9% of vacuum cleaners include this interface feature.
Nozzle light
yes
Nozzle light
yes
This vacuum cleaner includes a nozzle light. 43.4% of vacuum cleaners include this visibility feature.
Mopping support
no
Mopping support
no
This vacuum cleaner does not support mopping. 3.7% of vacuum cleaners support this multi-function feature.

Shark IW4621UKT vs the average vacuum cleaner

246810TotalPerformanceBatteryFiltrationAttachmentsDesignSmart features
  • Cordless operation
    Cordless
    yes
    This vacuum cleaner works cordlessly, the average vacuum cleaner does not.
  • Includes mini motorized brush
    Mini motorized brush
    yes
    This vacuum cleaner includes a mini motorized brush, the average vacuum cleaner does not.
  • Includes anti-tangle brush
    Anti-tangle brush
    yes
    This vacuum cleaner includes an anti-tangle brush, the average vacuum cleaner does not.
  • Automatic suction adjustment
    Auto suction adjustment
    yes
    This vacuum cleaner supports automatic suction adjustment, the average vacuum cleaner does not.
  • Includes dust particle sensor
    Dust particle sensor
    yes
    This vacuum cleaner includes a dust particle sensor, the average vacuum cleaner does not.
  • Includes removable battery
    Removable battery
    yes
    This vacuum cleaner includes a removable battery, the average vacuum cleaner does not.
  • 10 minutes longer runtime
    Battery runtime
    60 minutes
    This vacuum cleaner offers longer battery runtime than the average vacuum cleaner (60 minutes vs 50 minutes).
    60 minutes vs 50 minutes
  • Includes full bin indicator
    Full bin indicator
    yes
    This vacuum cleaner includes a full bin indicator, the average vacuum cleaner does not.
  • 8.8% better value for money
    Shark IW4621UKT offers better value for money than the average vacuum cleaner (8.32 vs 7.6).
    8.32 vs 7.65
  • 4.6% higher user score
    User score
    8.4/ 10
    ✕
    What it is
    A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
    When it matters
    When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Shark IW4621UKT
    the average vacuum cleaner
    Shark IW4621UKT has a higher user score than the average vacuum cleaner (8.37 vs 8.000).
    8.37 vs 8
  • 360 W lower power consumption
    Power consumption
    240 W
    This vacuum cleaner draws less power than the average vacuum cleaner (240 W vs 600 W).
    240 W vs 600 W
  • 1 more power levels
    Number of speeds
    3
    This vacuum cleaner offers more speed levels than the average vacuum cleaner (3 vs 2).
    3 vs 2
  • Cordless operation
    Cordless
    yes
    This vacuum cleaner works cordlessly, the average vacuum cleaner does not.
  • Includes removable battery
    Removable battery
    yes
    This vacuum cleaner includes a removable battery, the average vacuum cleaner does not.
  • 10 minutes longer runtime
    Battery runtime
    60 minutes
    This vacuum cleaner offers longer battery runtime than the average vacuum cleaner (60 minutes vs 50 minutes).
    60 minutes vs 50 minutes
  • Includes battery indicator
    Battery level indicator
    yes
    This vacuum cleaner includes a battery level indicator, the average vacuum cleaner does not.
  • 3 minutes longer turbo runtime
    Turbo mode runtime
    15 minutes
    This vacuum cleaner offers longer turbo runtime than the average vacuum cleaner (15 minutes vs 12 minutes).
    15 minutes vs 12 minutes
  • Includes full bin indicator
    Full bin indicator
    yes
    This vacuum cleaner includes a full bin indicator, the average vacuum cleaner does not.
  • 0.02 % higher filtration efficiency
    Minimum overall efficiency
    99.97 %
    This vacuum cleaner has higher filtration efficiency than the average vacuum cleaner (100 % vs 99.95 %).
    99.97 % vs 99.95 %
  • Includes mini motorized brush
    Mini motorized brush
    yes
    This vacuum cleaner includes a mini motorized brush, the average vacuum cleaner does not.
  • Includes anti-tangle brush
    Anti-tangle brush
    yes
    This vacuum cleaner includes an anti-tangle brush, the average vacuum cleaner does not.
  • Includes foldable tube
    Foldable tube
    yes
    This vacuum cleaner includes a foldable tube, the average vacuum cleaner does not.
  • 19.9% lower weight
    Weight
    2.9 kg
    This vacuum cleaner is lighter than the average vacuum cleaner (2.9 kg vs 3.62 kg).
    2.9 kg vs 3.62 kg
  • Newer release date
    Release date
    2024
    This vacuum cleaner has a newer release date than the average vacuum cleaner (2024 vs 2021).
    2024 vs 2021
  • Includes dust particle sensor
    Dust particle sensor
    yes
    This vacuum cleaner includes a dust particle sensor, the average vacuum cleaner does not.
  • Automatic suction adjustment
    Auto suction adjustment
    yes
    This vacuum cleaner supports automatic suction adjustment, the average vacuum cleaner does not.
  • Includes nozzle light
    Nozzle light
    yes
    This vacuum cleaner includes a nozzle light, the average vacuum cleaner does not.
  • Includes LED display
    LED display
    yes
    This vacuum cleaner includes an LED display, the average vacuum cleaner does not.
  • More operating noise
    Noise level (Min-Max)
    82-82 dB
    This vacuum cleaner is noisier than the average vacuum cleaner (82-82 dB vs 77-77 dB).
    82-82 dB vs 77-77 dB
  • 0.58 L smaller dust container
    Capacity
    0.42 L
    This vacuum cleaner has a smaller dust capacity than the average vacuum cleaner (0.4 L vs 1 L).
    0.42 L vs 1 L
  • 1 hours slower charging
    Charging time
    5 hours
    This vacuum cleaner charges slower than the average vacuum cleaner (5 hours vs 4 hours).
    5 hours vs 4 hours
  • 3.19 kPa lower suction pressure
    Suction power (kPa)
    16.81 kPa
    This vacuum cleaner has lower suction pressure than the average vacuum cleaner (16.8 kPa vs 20 kPa).
    16.81 kPa vs 20 kPa
  • 4.2 V lower voltage
    Battery voltage
    18 V
    This vacuum cleaner has a lower battery voltage than the average vacuum cleaner (18 V vs 22.2 V).
    18 V vs 22.2 V
  • 51 mm narrower cleaning path
    Cleaning path width
    209 mm
    This vacuum cleaner has a narrower cleaning path than the average vacuum cleaner (209 mm vs 260 mm).
    209 mm vs 260 mm
  • 88 mm deeper body
    Depth
    353 mm
    This vacuum cleaner is deeper than the average vacuum cleaner (353 mm vs 265 mm).
    353 mm vs 265 mm
  • 60% more expensive
    Shark IW4621UKT is more expensive than the average vacuum cleaner (£240 vs £150).
    £240 vs £150
  • 60% more expensive
    Shark IW4621UKT is more expensive than the average vacuum cleaner (£240 vs £150).
    £240 vs £150
  • More operating noise
    Noise level (Min-Max)
    82-82 dB
    This vacuum cleaner is noisier than the average vacuum cleaner (82-82 dB vs 77-77 dB).
    82-82 dB vs 77-77 dB
  • 3.19 kPa lower suction pressure
    Suction power (kPa)
    16.81 kPa
    This vacuum cleaner has lower suction pressure than the average vacuum cleaner (16.8 kPa vs 20 kPa).
    16.81 kPa vs 20 kPa
  • 51 mm narrower cleaning path
    Cleaning path width
    209 mm
    This vacuum cleaner has a narrower cleaning path than the average vacuum cleaner (209 mm vs 260 mm).
    209 mm vs 260 mm
  • 1 hours slower charging
    Charging time
    5 hours
    This vacuum cleaner charges slower than the average vacuum cleaner (5 hours vs 4 hours).
    5 hours vs 4 hours
  • 4.2 V lower voltage
    Battery voltage
    18 V
    This vacuum cleaner has a lower battery voltage than the average vacuum cleaner (18 V vs 22.2 V).
    18 V vs 22.2 V
  • 0.58 L smaller dust container
    Capacity
    0.42 L
    This vacuum cleaner has a smaller dust capacity than the average vacuum cleaner (0.4 L vs 1 L).
    0.42 L vs 1 L
  • 88 mm deeper body
    Depth
    353 mm
    This vacuum cleaner is deeper than the average vacuum cleaner (353 mm vs 265 mm).
    353 mm vs 265 mm

Graphic comparison of Shark IW4621UKT and other vacuum cleaners

No results found

Third-party reviews

Based on 577 buyer reviews from online shops.
Reviews last updated: July 2026 · How we calculate this

What customers like about Shark IW4621UKT?

  • Extremely lightweight and balanced handling compared to traditional cordless models
  • Highly maneuverable slim floorhead that glides smoothly into tight spaces
  • Convenient auto-empty base station that automatically charges and clears debris hands-free
  • Responsive dirt and edge detection sensors that dynamically adjust suction power and light up dark zones
  • Effective Anti-Hair Wrap technology preventing pet and human hair tangling on the brushroll
  • Easy and quick assembly process out of the box
  • Attractive, modern, and compact visual design

What customers dislike about Shark IW4621UKT?

  • Lower overall suction power compared to heavier competitors or premium corded vacuums
  • Noticeable lag or delay between pressing the power button and the motor starting
  • Relatively small on-board dust bin capacity on the stick unit itself
  • Perceived build quality issues with noticeable flex and creaking in the extension wand plastic
  • Battery life can drop rapidly to around 10-15 minutes when running constantly on boost or max modes

Expert reviews

In-depth analysis and verdict from leading tech publications

V
vacuumwars.com
11/09/2023
Summary of the review
V
vacuumwars.com
01/03/2025
Summary of the review
T
trustedreviews.com
23/10/2024
Summary of the review
I
idealhome.co.uk
14/04/2026
Summary of the review
C
cleangear360.co.uk
13/01/2026
Summary of the review
L
leparisien.fr
06/12/2024
Summary of the review
Q
quel-aspirateurs.fr
03/07/2025
Summary of the review
C
capital.fr
02/07/2026
Summary of the review
C
clubic.com
03/07/2025
Summary of the review
O
ouest-france.fr
26/05/2025
Summary of the review
J
journaldugeek.com
13/02/2024
Summary of the review
L
lesnumeriques.com
10/12/2023
Summary of the review

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

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