Choose your primary intended use — garden tools, bikes and mower, workshop, or vehicle storage — to get a recommended shed floor area.
Shed Size Calculator
Recommended shed size from what you plan to store, with a floor-area check against your list of items.
Choosing a Shed Size by Intended Use
This calculator gives a general recommended shed size based on what you primarily plan to store, from small garden tool storage up to space for a small vehicle or ATV. Actual needs vary based on your specific item list, so check this recommendation against a rough inventory of what you plan to store.
This covers related searches such as shed size calculator, what size shed do I need, and shed size by use.
How the Shed Size Calculator Works
Recommended size (ft²) by primary use: Garden tools/small equipment ≈ 48 ft² (6×8), Bikes + tools + mower ≈ 80 ft² (8×10), Workshop/larger equipment ≈ 120–160 ft² (10×12–10×16), Small vehicle/ATV storage ≈ 200 ft²+ (10×20+).
Worked Example
Primary use of bikes, tools, and a mower: Recommended size ≈ 80 ft², commonly an 8×10 shed.
Frequently Asked Questions
What if I want to use my shed as a workshop with a workbench?
A workshop use case generally needs more floor area than simple storage, both for the workbench itself and for working space around it, which is reflected in the larger recommended size for that category.
Should I size up if I plan to add items to my shed over time?
Yes — if you expect your storage needs to grow, sizing up from the minimum recommendation for your current use case can avoid needing to replace or add a second shed later.
Does shed height matter in addition to floor area?
Yes — taller sheds allow for wall-mounted storage and taller equipment, which can effectively increase usable storage capacity beyond what floor area alone suggests; consider height needs for items like ladders or tall shelving.
Do local building codes limit shed size?
Many jurisdictions have setback requirements and size thresholds above which a shed needs a building permit, so check your local zoning and building codes before finalizing a shed size, especially for larger workshop or vehicle-storage sizes.
Should I list out my specific items before choosing a size?
Yes — while this calculator gives a general starting point by use category, listing your specific items and their approximate footprint can help confirm whether the recommended size will actually fit everything comfortably.
Does a shed need aisle space to access stored items?
Yes — similar to a storage unit, leaving some walking space to access items without fully unloading the shed is worth factoring in, especially for a shed storing frequently used tools or equipment.
Can I combine storage and workshop use in one shed?
Yes — many sheds serve dual purposes; if combining uses, consider sizing toward the higher end of the relevant categories to ensure adequate space for both storage and working area.
Does shed size affect what foundation type I need?
Larger sheds, especially those in the vehicle-storage category, often require a more substantial foundation (like a concrete slab) compared to smaller sheds that may sit on a gravel pad or skids — check manufacturer and local code requirements for your specific size.
