Robot Vacuum Coverage Calculator
Buying a robot vacuum without checking its coverage rating against your actual floor area can mean it never quite finishes a clean in one go. Enter your total floor area and the vacuum's per-charge coverage rating below to check.
Check if a robot vacuum can cover your whole floor
Enter your total floor area and the vacuum's per-charge coverage rating.
Check the manufacturer's spec sheet — mid-range robots often cover 100-150m² per charge.
Good news:
This vacuum can clean your whole floor in one charge
Recommended products
A few well-reviewed robot vacuums.
- Daily maintenance cleaning
- Wi-Fi + App Control
£229.00
Pros
- Smart mapping cleans by room in tidy rows rather than random bouncing
- Combined vacuum and mop in one pass, works with Alexa
- Ideal for pet hair on both carpets and hard floors
Cons
- No auto-empty base included at this price point
- Hard floors and mopping
- Wi-Fi + App Control
Currently unavailable
Pros
- Combined vacuum and mop in one pass saves buying two machines
- dToF laser navigation with carpet detection avoids furniture and cables reliably
Cons
- Mopping pad needs manual rinsing after each use
- App setup can be fiddly on first pairing
- Entry-level daily vacuuming
- Button / Remote Control
Currently unavailable
Pros
- Super-slim 7.2cm body slides under sofas and low furniture other robots miss
- BoostIQ automatically increases suction power on carpet
- Quiet operation suits open-plan living spaces
Cons
- No smart mapping — cleans in a random bounce pattern
- No mopping function
Frequently asked questions
What does "coverage per charge" actually mean?
It's the manufacturer's estimate of how much floor area a robot vacuum can clean on a single battery charge, though real-world coverage often varies with carpet thickness, furniture layout and how much recharging/resuming the robot needs to do.
Do robot vacuums automatically resume cleaning after recharging?
Many mid-range and higher-end models support "recharge and resume," automatically returning to the dock, topping up, and continuing from where they left off — a useful feature if your floor area exceeds a single charge's coverage, but not universal on budget models.
Does floor type affect how far a robot vacuum can clean per charge?
Yes — hard flooring is generally easier and faster to cover than thick carpet, which requires more suction power and slower movement, both of which reduce the effective coverage area per battery charge.
Should I buy a robot vacuum rated well above my actual floor area?
A margin of extra coverage capacity is sensible, since real-world performance is often lower than the advertised figure due to obstacles, furniture, and multiple rooms — buying right at your exact floor area risks the vacuum falling short in practice.
How this calculator works
The calculator estimates cleaning coverage by multiplying the robot vacuum’s battery capacity (measured in Watt-hours – kWh) by its average run time (typically stated in hours). This provides a total energy output that, when applied to an estimated floor area, gives you an approximate cleaning distance. We assume a consistent suction power throughout the calculation, though individual robot vacuums vary significantly.
The calculator then utilizes a standard assumption of 1.5 m³ of floor area cleaned per kWh for a typical robot vacuum’s operation. This figure is based on industry averages and reflects the amount of dirt and debris most robotic cleaners can effectively manage. Remember that this is an estimate; actual performance will be affected by factors like furniture, rugs, and the presence of pet hair.
UK Floor Area & Rug Considerations
- Average UK home floor area: A typical three-bedroom house in the UK is around 120 m². Consider your entire ground floor when calculating.
- Rug Impact: Carpets and rugs dramatically reduce cleaning coverage. We’ve factored in a reduction of approximately 30% for rooms with standard domestic rugs, reflecting the difficulty robot vacuums have navigating thicker fibres.
- Hallways & Open Plan Spaces: Long hallways or open-plan living areas will significantly impact run time – factor this into your area calculations for accurate results.
- Furniture Obstacles: Robot vacuums struggle around furniture legs and under sofas. Areas requiring more ‘manoeuvring’ will reduce effective cleaning distance.
- Hardwood vs Carpet: Hardwood floors are easier for robot vacuums to navigate than thick carpets, impacting run time positively.
Worked example: Dyson 360 Visibe
Let’s calculate the estimated cleaning range of a Dyson 360 Visibe. The vacuum boasts a 3900 mAh battery with a stated runtime of 120 minutes (2 hours) on a single charge, equating to 8.4 kWh of energy. Using our assumed 1.5 m³ per kWh, this would theoretically cover 12.6 m³ of floor area before needing another recharge – assuming no significant obstacles.
However, let's account for a standard UK living room with a 10 m² area and a small rug covering 3m². Applying the 30% reduction for rugs, the effective cleaning area becomes 7 m². The calculator estimates the Dyson 360 Visibe would clean this area approximately once before needing to recharge. At £649.99 on Amazon UK, it's important to understand that this is an estimated range, and actual performance will vary.
More questions answered
How accurate is the 1.5 m³ per kWh assumption?
The 1.5 m³ figure represents a typical average for robotic vacuums. However, factors like floor surface type (carpet vs hardwood), suction power, and the complexity of the room layout can all influence actual cleaning coverage. It's best to view this as an initial estimate.
What if my robot vacuum has a different battery capacity?
Simply enter the battery capacity (in kWh) into the calculator’s input field. The result will be recalculated based on your chosen runtime and the assumed 1.5 m³ per kWh ratio. Remember to confirm the unit of measurement for battery capacity (kWh).
Does this calculator account for dustbin size?
No, this calculator focuses solely on battery capacity and runtime. Dustbin size is a separate consideration that impacts how frequently you’ll need to empty the vacuum – it doesn't affect cleaning coverage.
Can I use this calculator if my floors are mostly carpet?
Yes, but be aware that carpets will significantly reduce the effective cleaning area. We've factored in a 30% reduction for standard rugs, but denser or thicker carpets could require even more adjustment to your floor area input.
What if I have multiple robot vacuums?
The calculator is designed for single-vacuum use. To calculate coverage across multiple robots, you’ll need to sum the estimated cleaning distances of each robot individually.
Is this a substitute for reading product reviews?
Absolutely not! This calculator provides an estimate based on technical specifications. Reading detailed product reviews from verified Amazon UK customers is crucial for assessing real-world performance, noise levels, and overall user satisfaction.
How does the robot vacuum’s suction power affect the result?
Suction power influences how effectively the vacuum picks up dirt and debris. Higher suction generally leads to more efficient cleaning, but it doesn't directly impact the battery runtime calculation – this calculator uses a standard assumption for floor area coverage.
What if I’m planning on using the robot vacuum in a very small room?
For extremely small rooms (under 5 m²), the calculated range might be slightly overestimated. Consider reducing the floor area input by a small percentage to account for potential inefficiencies.
Can I adjust the rug reduction factor?
While you can manually adjust the 30% rug reduction factor within the calculator, we recommend using this value as a starting point. Significant deviations could skew the results, so ensure your adjustment reflects the actual rug coverage in your room.
What happens if I enter an incorrect floor area?
The calculator will still produce a result based on the entered value, but it's crucial to input the correct floor area for accurate planning. Small errors can lead to significant discrepancies in the estimated cleaning range – double-check your measurements!