Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Floor area (sq ft)
120
Wall siding area (sq ft)
308
Roof area (with pitch) (sq ft)
138
Estimated material cost
$4,528
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter shed length (ft).
- 2Enter shed width (ft).
- 3Enter wall height (ft).
- 4Enter material price per sq ft ($).
- 5Read your floor area (sq ft) on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
10x12 is one of the most common backyard shed sizes, big enough for a riding mower and tools but still small enough to build in a weekend. This calculator estimates floor decking area, wall siding area based on your wall height, and roof area with pitch, plus a rough total material cost so you can plan your shed build budget.
Worked example
Using the values the calculator loads with:
Inputs
- Shed length: 12 ft
- Shed width: 10 ft
- Wall height: 7 ft
- Material price per sq ft: 8 $
Results
- Floor area (sq ft): 120
- Wall siding area (sq ft): 308
- Roof area (with pitch) (sq ft): 138
- Estimated material cost: $4,528
What each field means
Inputs
- Shed length (ft)
- The shed length used in the calculation, measured in ft. Starts at 12 ft so you have a working example on load.
- Shed width (ft)
- The shed width used in the calculation, measured in ft. Starts at 10 ft so you have a working example on load.
- Wall height (ft)
- The wall height used in the calculation, measured in ft. Starts at 7 ft so you have a working example on load. Accepted range: 6–12 ft.
- Material price per sq ft ($)
- The material price per sq ft used in the calculation, measured in $. Starts at 8 $ so you have a working example on load.
Results
- Floor area (sq ft)
- Returned as a whole number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Wall siding area (sq ft)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Roof area (with pitch) (sq ft)
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Estimated material cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Do I need a permit for a 10x12 shed?
Many jurisdictions exempt sheds under 120 sq ft (like a 10x12, at 120 sq ft) from permits, but always check your local building department since rules vary widely.
What's a good wall height for a 10x12 shed?
7 feet is standard for storage-only use; go to 8-9 feet if you want a loft or plan to stand comfortably near the walls.
Does this include the foundation?
No, use a dedicated shed pad or slab calculator for the foundation — this tool covers the floor deck, walls, and roof materials only.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). 10x12 Shed Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/10x12-shed-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/10x12-shed-calculator" target="_blank" rel="noopener">10x12 Shed Calculator — RevenueLab</a> (2026).</p>
Source: [10x12 Shed Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/10x12-shed-calculator) (2026).