Vacuum Cleaner Calculator
Tell us about your home and we will estimate the vacuum type, suction power, battery runtime and dust capacity you actually need — plus what it will cost to run each year.
Your recommendation
Updated every time you change an answer.
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How this vacuum calculator works
The calculator combines four factors that matter most when choosing a vacuum cleaner: the size of the area you clean, how much of it is carpet, how much debris your household creates, and how much time you are willing to spend. Each answer adjusts a score for the four main vacuum types — upright, canister, cordless stick and robot — and the highest score becomes your primary recommendation.
Suction targets are expressed in air watts (AW) for corded and cordless vacuums and in pascals (Pa) for robots, because those are the figures manufacturers actually publish. Air watts describe useful cleaning power (airflow multiplied by suction), unlike motor watts, which only describe electricity use. We start from a hard-floor baseline and add power for carpet share, carpet pile height and pets.
Battery runtime assumes an average cleaning speed of roughly 40 square feet per minute, slowed down on carpet where you typically need boost mode, plus a 30% safety margin so the battery is not run to zero. Running cost includes electricity and typical consumables such as filters, bags, brush rolls and, for cordless models, gradual battery wear.
Results are estimates designed to narrow your shortlist. Always compare them with the official specifications of the models you are considering.
Vacuum cleaner buying guide
1. Choose the type first
| Type | Best for | Watch out for |
|---|
| Upright | Large carpeted homes, deep cleaning, pets | Heavy on stairs, bulky storage |
| Canister | Mixed floors, stairs, upholstery, allergy sufferers (bagged) | Dragging the body around, needs storage space |
| Cordless stick | Apartments, quick daily cleans, multi-level homes | Limited runtime on max power, smaller bins |
| Robot | Busy people, pet hair maintenance, hard floors | Struggles with deep carpet, cables and stairs |
2. Understand suction numbers
Air watts are the most honest number for comparing corded and cordless vacuums. Around 100 AW is fine for hard floors, 150–200 AW handles mixed homes and 220+ AW suits thick carpet and heavy shedding. Robot vacuums list suction in pascals: 2,000–2,500 Pa is entry level, 4,000–6,000 Pa is strong, and newer flagship robots exceed 8,000 Pa.
3. Filtration matters more than you think
A HEPA filter only works if the whole machine is sealed. Look for "sealed system" or "whole-machine filtration" if anyone in your home has allergies. Washable pre-filters lower running costs, but they must dry completely (usually 24 hours) before reuse.
4. Brush roll design
Pet owners should look for anti-tangle or comb-style brush rolls that cut or release wrapped hair. Soft roller heads are better on hard floors because they pick up fine dust and larger debris without scattering it. Many cordless models include both heads.
5. Plan for ongoing costs
Bags, filters and replacement batteries can cost more over five years than the price difference between two vacuums. Check the price and availability of consumables before you buy, especially for less common brands.
Frequently asked questions
How much suction power does a vacuum need?
For mostly hard floors, about 100 air watts on a corded vacuum or 2,000–2,500 Pa on a robot is enough. Homes with thick carpet or shedding pets benefit from 180–250 AW corded, 120+ AW cordless or 4,000+ Pa robot suction.
How long should a cordless vacuum battery last?
Look for a standard-mode runtime at least 30% longer than the time you need to clean your whole home. Most apartments need 20–30 minutes; larger houses need 45–60 minutes or a second swappable battery.
Is a HEPA filter worth it?
If anyone has allergies or asthma, yes. A sealed HEPA system traps 99.97% of particles at 0.3 microns and stops fine dust from being blown back into the room.
Bagged or bagless?
Bagged models keep dust sealed away when you empty them, which helps allergy sufferers, but bags are an ongoing cost. Bagless models are cheaper to run but release some dust when emptied.
Can a robot vacuum replace a regular vacuum?
In apartments with mostly hard floors it often can. In larger homes with carpet, stairs or pets, a robot works best as a daily maintenance tool alongside a stick or upright vacuum for weekly deep cleaning.
Are motor watts the same as suction?
No. Motor watts show how much electricity the vacuum uses, not how well it cleans. Two vacuums with identical motor watts can have very different suction depending on the design of the airflow path.
About VacuumFit
VacuumFit is an independent, free tool created to help shoppers translate their real-life cleaning needs into concrete specifications. We are not affiliated with any vacuum manufacturer or retailer, and the calculator does not promote specific brands. Our formulas are based on publicly available manufacturer specifications, standard testing terminology and common household cleaning patterns.
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Last updated: October 2026
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By using this website you agree to these terms. The calculator and articles are provided for general information only and are offered "as is" without warranties of any kind. Results are estimates and may differ from real-world performance, which depends on the specific product, its settings and your usage. Always check the manufacturer's specifications and safety instructions before buying or using any appliance. We are not liable for any decision made on the basis of the information on this site. Product and brand names mentioned belong to their respective owners. Advertisements on this site are provided by third parties; we do not endorse advertised products.