Concrete Calculators
Free calculators for every concrete job. Each one shows the formula it uses, handles imperial and metric units, and exports a PDF.
Concrete Bag Calculator: How Many Bags in a Yard?
45 bags of 80 lb or 60 bags of 60 lb make one cubic yard (72 of 50 lb, 90 of 40 lb). Free calculator converts bags to yards for slabs, posts and pads.
CMU Block Calculator (Cinder Block)
Free CMU and cinder block calculator. Estimate block count, mortar bags and grout fill for walls and foundations, with openings and waste factor.
Concrete Column Calculator
Free concrete column calculator for round and square columns. Get cubic yards and bag counts for deck posts, porch columns, piers and sonotubes.
Concrete Footing Calculator
Free concrete footing calculator. Get cubic yards, bag count and cost for pad footings, deck piers and foundation pads, with waste factor and PDF.
Concrete Material Estimator
Calculate cement bags, sand, gravel and water for any concrete volume. Supports 1:2:4, 1:1.5:3 and 1:1:2 mix ratios in cubic yards, feet or meters.
Concrete Slab Calculator
Free concrete slab calculator. Get cubic yards, 80 lb bag counts and cost for patios, pads, driveways, garage floors and sidewalks, with waste factor.
Concrete Stairs Calculator
Free concrete steps calculator. Enter step count, rise, run and width to get cubic yards and bag counts for porch steps, entry stairs and landings.
Concrete Weight Calculator
A cubic yard of concrete weighs about 4,050 lb (150 lb/ft³). Calculate the weight of any slab or volume in pounds, kilograms and tons, by mix type.
Curb & Gutter Calculator
Free curb and gutter concrete calculator. Estimate cubic yards, bags and cost for curb only, gutter only or combined sections, with waste factor.
Post Hole Concrete Calculator
Free post hole concrete calculator for fence and deck posts. Get bags per hole and total volume from hole size, depth and post size, with waste.
Rebar Calculator
Free rebar calculator for slabs, footings and walls. Get bar count each way, total linear feet, weight and lap splices for #3 to #8 bar at any spacing.
Strip Footing Calculator
Free strip footing calculator for continuous foundation footings. Get cubic yards, bags and materials from perimeter, width and depth, with waste.