Free Construction Calculators
Accurate, fast, and free calculators for construction professionals and DIY enthusiasts. Calculate material quantities, costs, and specifications for your next project.
Construction Calculators
Concrete Volume Calculator
Calculate how much concrete you need for slabs, footings, and columns. Results in cubic yards and number of bags.
Deck Board Calculator
Calculate how many deck boards you need for your project, including gap spacing and a 10% waste allowance for cuts and defects.
Drywall Calculator
Calculate how many 4x8 drywall sheets you need plus joint compound and tape. Accounts for doors and windows.
Fence Post Spacing Calculator
Calculate the number of fence posts and sections needed for your fence line. Includes total post material requirements.
Fill Dirt / Excavation Calculator
Calculate the volume of fill dirt needed or soil to excavate. Results in cubic yards, tons, truckloads, and estimated cost.
Gravel Calculator
Calculate cubic yards, tons, and truckloads of gravel or aggregate needed for your project. Includes waste factor adjustment.
Lumber Board-Feet Calculator
Calculate board feet for lumber purchases. Enter dimensions and quantity to get total board footage and estimated cost.
Mulch Calculator
Calculate how much mulch you need for garden beds and landscaping. Results in cubic yards, number of bags, and estimated weight.
Paint Coverage Calculator
Calculate how many gallons of paint you need for a room. Accounts for doors, windows, and multiple coats.
Post Hole Concrete Calculator
Calculate how much concrete you need for setting fence posts, mailbox posts, or deck posts in cylindrical holes. Results in cubic feet and number of bags.