Garage Shelving Calculator
Garages fill up fast without proper shelving, leaving items stacked awkwardly on the floor. Enter your available wall length and shelving unit width below to see how many units fit and roughly how much storage volume you'll gain.
Work out how many shelving units fit your garage
Enter your available wall length and the shelving unit width.
Standard boltless garage units are usually around 90cm wide.
Along 3m of wall, you can fit:
3 shelving units
That's 15 shelf tiers, giving roughly 2,100L of usable storage volume (assuming 5 tiers per unit).
Recommended products
A few well-reviewed garage storage solutions.
Currently unavailable
Pros
- Metal-reinforced shelves and hinges for durability
- Weatherproof resin suits unheated garages
- Compact 88 x 45 x 99.5cm footprint
Cons
- Needs two people to assemble comfortably
- Steel
- 875kg Total Load Capacity
£29.99
Pros
- Holds up to 875kg across all shelves (175kg per shelf)
- Boltless design assembles in under 30 minutes
- Budget-friendly for the capacity offered
Cons
- Steel frame can mark unpainted concrete floors
Currently unavailable
Pros
- 1200L capacity fits two 240L wheelie bins or bikes and tools
- Piston-assisted lid opens from the top or front
- Fully weatherproof and low maintenance
Cons
- Large footprint needs a flat, level base
- Heavier and pricier than shelving alternatives
Frequently asked questions
How much weight can garage shelving units hold?
It varies by product, but boltless steel shelving units commonly support 100-250kg per shelf, well suited to tools, paint tins and stored boxes. Always check the manufacturer's per-shelf weight rating before loading up heavier items.
Should I leave a gap between shelving units and the garage door?
Yes — check the clearance needed for an up-and-over or roller door to fully open before positioning units, and leave some space around a car if the garage is also used for parking.
Is it better to use fewer tall units or more shorter ones?
Taller units maximise storage for a given floor footprint, which usually matters more in a garage than shelf height, so it's generally worth going as tall as ceiling height and door clearance allow.
What should I store on the top shelves versus the bottom?
Keep heavier, frequently used items on lower or middle shelves for easy, safer access, and reserve the top shelves for lighter, less frequently needed items like seasonal decorations or spare parts.
How this calculator works
The calculator uses a simple multiplication process. You input the available wall space (length and height) in centimetres, then select a standard shelving unit size – we offer common UK options like 90cm wide x 30cm deep or 120cm wide x 40cm deep. The calculator then calculates the number of units that can fit along each dimension. Finally, it estimates the total storage volume (in cubic metres) based on the chosen unit dimensions and the number of units calculated.
UK Garage Storage Dimensions & Typical Item Sizes
- **Shelf Depth:** Common garage shelving depths range from 25cm (ideal for tools) to 60cm (suitable for longer items like garden hoses or lumber). Consider the largest item you regularly store when selecting your shelf depth.
- **Wall Height:** Most UK garages have wall heights between 2.4m and 3m. Be realistic about the usable height – account for electrical outlets, doors, and headroom.
- **Tool Dimensions:** A typical spade might be 80cm long, a wheelbarrow 120cm long and 90cm wide. Larger tools like lawnmowers can easily exceed 180cm in length.
- **Storage Box Sizes:** Standard storage boxes often measure 45cm x 35cm x 30cm – this is a good starting point for calculating volume estimates, but always double-check the dimensions of your intended items.
- **Material Considerations:** Metal shelving units are generally sturdier and better suited to heavier loads (tools, bricks), while wooden shelves can handle lighter items like gardening gloves and seed packets more effectively.
- **UK Regulations:** Ensure any shelving you install complies with UK building regulations regarding wall stability – particularly when supporting heavy items. Check the weight capacity of your chosen unit.
Worked example: Optimising a 2.7m x 1.8m Garage Wall
Let’s say you have a garage wall measuring 2.7 metres (length) by 1.8 metres (height). You decide to use shelving units that are 90cm wide x 30cm deep. The calculator will first determine how many 90cm shelves can fit along the 2.7m length: 2.7 / 0.9 = 3 shelves. Then, it calculates how many 30cm deep shelves can fit across the 1.8m height: 1.8 / 0.3 = 6 shelves. This means you could accommodate a total of 3 x 6 = 18 shelving units within this space.
Assuming each unit holds approximately 0.075 cubic metres (0.9m³ / 100), the total storage capacity would be 18 units * 0.075 m³/unit = 1.35 m³. This is enough to store a surprising amount – roughly equivalent to around 20 standard storage boxes measuring 45cm x 35cm x 30cm. You could purchase these shelves and associated storage containers from Amazon UK for an estimated total of £270 - £450 depending on the chosen material and quantity.
More questions answered
What if my garage wall isn't a perfect rectangle?
The calculator assumes rectangular walls. If your wall is significantly irregular, you’ll need to manually adjust the calculations based on the usable space along each dimension. Consider using a measuring tape and marking out sections to get an accurate measurement.
How does this calculator handle angled walls?
Angled walls will reduce the amount of shelving units you can fit. The calculator doesn’t automatically account for angles; you'll need to factor in a reduction of approximately 10-20% depending on the angle, using your own measurements.
What if I want to use different sized shelves?
Simply adjust the shelf dimensions within the calculator. The volume calculation will automatically update based on the new dimensions you enter – just remember that this is an estimate.
Does the calculator account for doors and windows?
No, the calculator focuses solely on wall space. You must subtract the area occupied by any doors or windows when determining your usable shelving space.
What does 'cubic metres' actually mean?
Cubic metres is a unit of volume – it represents the amount of space enclosed within a three-dimensional object. It’s a useful way to compare the storage capacity of different shelving units and containers.
Can I use this calculator to plan for overhead storage racks?
No, this calculator is specifically designed for wall-mounted shelving. Overhead storage requires separate calculations based on ceiling height and rack dimensions.
How accurate are the volume estimates?
The volume estimates are approximations. They rely on standard shelf dimensions and assume items are stored neatly. For more precise calculations, consider using a measuring tape to measure your specific items and containers.
What if I’m storing very bulky items like garden furniture?
These bulky items will significantly reduce the number of units you can fit. Consider using wider shelves or adjustable shelving systems to accommodate larger dimensions.
I've entered my measurements, but the calculator suggests a really low number of units – what does this mean?
This could indicate that your wall space is smaller than initially assumed, or that you’re trying to fit very large items into the shelves. Double-check your measurements and consider reducing the dimensions of your planned shelving.
Where can I buy the shelves suggested by the calculator?
You'll find a wide selection of garage shelving units available on Amazon UK, covering various styles and price ranges – from metal wire shelving to heavy-duty wooden options. Be sure to check product dimensions and customer reviews before purchasing.