Shed Calculators
From foundation to roof, a shed has many parts to size. Plan floor area, rafters, ventilation and cost, with carports and greenhouses covered too.
Shed Calculator
Plan a full shed with size, materials and cost in one place.
Shed Size Calculator
Choose a shed size that fits your storage needs and lot.
Carport Calculator
Plan a carport with size, posts and roof.
Greenhouse Calculator
Plan a greenhouse with size, frame and cover.
Shed Foundation Calculator
Plan the base your shed will sit on.
Shed Insulation Calculator
Estimate the insulation needed for shed walls and roof.
Shed Rafter Calculator
Work out rafter length and count for your shed roof.
Shed Ventilation Calculator
Find the vent area your shed needs.
Shed Weight Calculator
Estimate the weight of your shed and its contents.
Shed Material Calculator
Estimate the lumber and materials for a shed.
Shed Cost Calculator
Estimate the total cost of your shed project.
Shed Area Calculator
Measure shed floor area in square feet or square metres.
Shed Roof Calculator
Estimate roofing material for your shed.
Carport Cost Calculator
Estimate the cost of building a carport.
Carport Material Calculator
Estimate the materials needed for a carport.
Greenhouse Cover Calculator
Work out the film or panels needed to cover a greenhouse.
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How to Use Our Shed Calculators
Follow four simple steps to turn your shed measurements into a clear material list.
Pick a calculator
Choose the shed calculator that fits your job, such as the Shed Size or Shed Foundation calculator.
Enter your measurements
Add length, width and height, plus any material details the calculator asks for.
Check the result
Read the amount you need, with a waste allowance and the formula shown.
Plan your purchase
Use the figures to compare suppliers and order the right amount of lumber, roofing and hardware.
Why Use Our Shed Calculators
Simple tools that save you time, and help you avoid over-buying or running short.
Built for shed projects
Every calculator in this category is made for shed jobs, so the inputs match what you measure on site.
Clear, checkable math
Each result shows the formula behind it, so you can verify the numbers before you buy.
Free, with no signup
Use every shed calculator as often as you like, without creating an account.
Shed Calculator FAQs
Quick answers to common questions about our shed calculators.
Are the shed calculators free?
Yes. Every shed calculator is free to use, and you do not need an account.
How accurate are the shed calculator results?
Results follow standard formulas and use the measurements you enter. Treat them as planning figures, and confirm structural details with local codes or a professional.
How much extra material should I order for a shed?
Most projects need 5 to 10 percent more than the exact figure to cover cuts, breakage and uneven ground.
Which shed calculator should I start with?
Start with the main Shed calculator for an overview, then open the specific tools for size, foundation, roof and materials as you plan each stage.
Browse More Categories
Explore calculators for the rest of your backyard projects.