Construction & Real Estate

Carpet Builtup Calculator

Convert carpet area to built-up area using customizable loading factors.

Square Footage Calculator

Calculate square footage of rectangles, circles, triangles, trapezoids and more. Free online square footage calculator with price per square foot option.

Stair Calculator

Calculate staircase dimensions including number of steps, riser height, tread depth, and stringer length. Free online stair calculator with building code compliance.

Tile Calculator

Estimate the total number of tiles needed to cover a floor, wall, roof, or any surface. Accounts for tile size, gap spacing, box sizes, and pricing.

Gravel Calculator

Calculate the amount of gravel needed for your landscaping or construction project. Estimate volume, weight, and cost based on area dimensions, depth, and gravel type.

Concrete Calculator

Calculate the amount of concrete needed for slabs, columns, tubes, curbs, and stairs. Estimate volume in cubic yards, cubic feet, and number of concrete bags required.

BTU Calculator

Calculate the required BTU (British Thermal Units) for heating or cooling a room based on dimensions, insulation, sun exposure, climate zone, and number of occupants.

Roofing Calculator

Calculate roof area, estimate materials needed for your roofing project. Free online roofing calculator with pitch correction and cost estimation.

Mulch Calculator

Calculate the amount of mulch needed for your garden or landscaping project. Free online mulch calculator with depth and cost estimation.

Cubic Yards Calculator

Calculate cubic yards volume for landscaping, construction, and fill materials. Free online cubic yards calculator with multiple shape options and cost estimation.

Cubic Feet Calculator

Calculate cubic feet volume for shipping, moving, storage, and construction. Free online cubic feet calculator with multiple shapes and unit conversions.

Feet and Inches Calculator

Add, subtract, multiply, divide, and convert feet and inches measurements. Free online feet and inches calculator with fractions, decimals, and mixed numbers.

Road Base Calculator

Calculate road base material volume for roads, driveways, and parking lots. Free online roadway fill volume calculator with material density and cost estimation.

Tank Volume Calculator

Calculate tank volume and fill level for horizontal and vertical cylinders, rectangles, ovals, capsules, and more. Free online tank volume calculator in gallons and liters.

Board Feet Calculator

Calculate board feet for lumber using nominal dimensions. Supports single piece, multiple identical pieces, and mixed orders with optional price per board foot.

Concrete Volume Calculator

Calculate concrete volume for slabs, footings, columns, and walls with bag counts and waste factor.

French Drain Calculator

Calculate French drain pipe diameter, gravel volume, and trench dimensions for effective drainage system design.

Gutter Design Calculator

Calculate gutter flow rate using the Manning equation for roadway and roof drainage design. Solve for flow rate, Manning n, cross slope, longitudinal slope, or flow spread.

Paint Coverage Calculator

Calculate how many gallons of paint you need for a room. Computes interior wall area, subtracts doors and windows, and divides by coverage rate.

Thrust Block Calculator

Calculate thrust block bearing area, thrust force, and soil bearing pressure for pipe fittings. Free online thrust block design calculator for engineers.

Air Conditioner BTU Calculator

Calculate the required BTUs for an air conditioner based on room dimensions, number of people, sun exposure, and insulation quality.

Beam Load Calculator

Calculate beam load capacity, bending moment, shear force, stress, and deflection for various support types and cross-sections.

Brick and Mortar Calculator

Calculate how many bricks and how much mortar you need for your wall project. Supports doors/windows, multiple brick sizes, bond patterns, and cost estimation.

Cone Flat Pattern Template Generator

Generate flat sheet layout pattern dimensions for making a full or truncated cone (frustum). Calculates radius, arc length, and angle for fabrication.

Decking Calculator

Calculate all materials needed for your deck project including decking boards, joists, beams, posts, and fasteners with waste allowance.

Drywall Calculator

Estimate the number of drywall sheets, joint compound, tape, and total cost needed for your wall and ceiling project. Calculate by room dimensions or total square footage.

Fabric Calculator

Calculate fabric yardage for sewing and quilting projects with seam allowance, directional prints, waste buffer, and cutting layout estimates.

Fence Calculator

Calculate fence materials including posts, rails, pickets, panels, concrete, and hardware for privacy, picket, post & rail, and panel fence styles.

Flooring Calculator

Calculate how much flooring material you need for any room shape with waste factor and cost estimation.

Miter Angle Calculator

Calculate the precise miter and bevel angles for simple frames or compound crown molding joints using your saw.

Bulb Spacing

Calculate exactly how many flower bulbs you need for your garden bed based on area dimensions, plant spacing, and grid layout patterns.

Compost Calculator

Calculate how much compost you need for your garden or lawn. Free online compost calculator to determine compost volume, cost, and weight for any project.

Grain Bin Calculator

Calculate grain bin volume and bushel capacity for round and rectangular bins. Free online grain bin calculator for farmers and grain storage management.

Pine Straw

Calculate how many bales of pine straw you need for your garden or landscaping project based on area dimensions and coverage per bale.

Sod Calculator

Calculate how many rolls of sod you need and the total cost based on your lawn area, waste factor, and sod roll dimensions.

AC Tonnage Calculator

Calculate recommended air conditioner tonnage from room size, ceiling height, occupants, and sunlight. Free online AC tonnage and BTU calculator.

Air Changes Per Hour Calculator

Calculate air changes per hour from room dimensions and airflow in CFM. Free online ACH calculator for ventilation planning.

Aluminum Weight Calculator

Calculate aluminum weight by alloy, shape, and dimensions. Supports plates, rods, tubes, spheres, and more with density-based mass formulas.

Angle Cut Calculator

Find knee bracing cut angles and plank lengths for woodworking and framing. Computes miter angles from room dimensions and plank thickness.

Angle of Depression Calculator

Calculate angle of depression from vertical and horizontal distances. Also solves line-of-sight distance using inverse trigonometry.

Arch Calculator

Calculate elliptical arch focal points, perimeter, and rise from base length. Plan doorway arches and construction templates.

Asphalt Calculator

Calculate asphalt volume, weight, and total cost from area dimensions, thickness, and density for driveways, roads, and paving projects.

Baluster Calculator

Calculate how many balusters you need for a railing based on length, posts, widths, and spacing with code-compliant spacing checks.

Beam Deflection Calculator

Calculate maximum beam deflection for common load cases using span, elastic modulus, moment of inertia, and applied loads.

Bending Stress Calculator

Calculate maximum bending stress from applied moment and beam cross-section dimensions for square, rectangle, circle, and more shapes.

Torque Calculator

Calculate torque from force, lever arm distance, and angle. Convert results between N·m, lb·ft, lb·in, and kgf·m.

Birdsmouth Cut Calculator

Calculate rafter run, rise, length, heel cut depth, and IRC minimum depths for birdsmouth roof cuts from building width and pitch.

Board and Batten Calculator

Estimate boards, battens, furring strips, and trim material for board and batten wall siding from wall dimensions and board spacing.

Board on Board Fence Calculator

Calculate pickets, posts, rails, and recommended overlap for board-on-board privacy fences with overlapping picket layout.

Boiler Size Calculator

Find minimum combi, heat-only, or system boiler size in kW from bedrooms, bathrooms, and property age for UK-style sizing.

Bowl Segment Calculator

Calculate cutting angles and inner/outer segment lengths for segmented wood bowl turning from ring radius and segment count.

Box Fill Calculator

Calculate NEC box fill volume allowances for conductors, clamps, devices, and grounding wires to choose the right electrical box size.

Carpet Calculator

Calculate carpet area for rectangle, circle, and polygon shapes and estimate material cost with waste allowance.

Cement Calculator

Calculate cement, sand, gravel, and water quantities for concrete or mortar mixes from wet volume and mix ratio.

CFM Calculator

Calculate CFM airflow from room size, air changes per hour, or duct dimensions for HVAC ventilation planning.

Concrete Block Calculator

Estimate concrete blocks, mortar bags, and total cost for cinder block walls from wall dimensions.

Concrete Block Fill Calculator

Calculate mortar or concrete volume to fill hollow concrete block cores for reinforced walls.

Concrete Column Calculator

Calculate concrete volume, weight, and premix bags for round, square, and rectangular columns with mix ratio breakdown.

Concrete Cylinder Calculator

Estimate concrete volume, weight, bags, and cement-sand-gravel quantities for cylindrical columns and test specimens.

Concrete Driveway Cost Calculator

Estimate concrete, gravel, rebar, forms, and total driveway construction cost from dimensions and material prices.

Concrete Weight Calculator

Calculate concrete weight from volume and density for Portland, reinforced, gravel, and other concrete types.

Crushed Stone Calculator

Estimate crushed stone volume in cubic yards and weight in tons for rectangular or circular areas with depth and waste factor.

Deck Stain Calculator

Calculate deck stain gallons needed for floor, railing, and steps based on area, coats, and coverage per gallon.

DIY Shed Cost Calculator

Estimate DIY shed build cost from dimensions and roof type with floor, wall, and roof area and material pricing.

Door Header Size Calculator

Find recommended door header lumber size from rough opening or maximum span for 4x4 through 4x12 headers.

Elevation Grade Calculator

Calculate terrain grade, slope percentage, and angle of elevation from vertical rise and horizontal run.

Epoxy Calculator

Estimate epoxy resin volume in gallons, ounces, and liters for rectangular or circular surfaces at any coating thickness.

Fence Cost Calculator

Estimate total fence material cost for posts, rails, pickets, and concrete footings from fence dimensions and unit prices.

Fence Perimeter Calculator

Calculate total fence length for rectangular yards from length, width, area, or gate opening dimensions.

Fence Picket Calculator

Estimate how many fence pickets you need from fence length, picket width, and spacing.

Fence Post Depth Calculator

Calculate ideal post burial depth and total post length from fence height and depth ratio.

Fire Flow Calculator

Calculate required fire flow in GPM using NFA and Iowa methods for fire suppression planning.

Fire Glass Calculator

Calculate fire glass volume and weight for fire pits and fireplaces by shape, depth, and glass type.

Floor Area Ratio Calculator

Calculate carpet area, built-up area, super built-up area, FAR, FSI, loading factor, and open space ratio for real estate.

Floor Joist Calculator

Estimate floor joist quantity, end joist length, and material cost from room size, joist size, and on-center spacing.

Framing Calculator

Calculate how many wall studs you need for framing based on wall length, on-center spacing, and stud price.

Square Feet to Cubic Yards Calculator

Convert square feet to cubic yards using depth or height. Calculate mulch, soil, and concrete volume instantly.

Furnace Size Calculator

Calculate recommended furnace BTU capacity by climate zone, room area, insulation, and sunlight exposure.

Gallons Per Minute Calculator

Calculate GPM flow rate from volume and time. Convert between gallons per minute, liters per minute, and more.

Gallons Per Square Foot Calculator

Calculate gallons per square foot from area and depth. Convert square feet to gallons for pools, tanks, and aquariums.

Gambrel Roof Calculator

Calculate gambrel roof angles, rafter lengths, roof area, and attic volume using two-pitch or half-circle methods.

Glass Weight Calculator

Calculate glass sheet weight from dimensions, thickness, glass type density, and quantity for windows, panels, and aquariums.

Grout Calculator

Estimate tile grout volume and number of bags from area, tile size, gap width, and gap depth.

Heat Loss Calculator

Estimate room heat loss and required heater power from dimensions, insulation, floor level, and temperature difference.

Hole Volume Calculator

Calculate hole volume for circular and rectangular excavations, plus concrete needed for post holes with waste allowance.

Insulation Calculator

Calculate total R-value and U-value for multi-layer wall, attic, and floor insulation assemblies from material types and thicknesses.

Junction Box Sizing Calculator

Determine minimum junction box length and height from conduit sizes for straight and angle wire pulls per NEC Article 314.28.

Ladder Angle Calculator

Calculate ladder angle, working length, and bottom distance using the 4-to-1 safety rule for safe ladder setup.

Limestone Calculator

Estimate crushed limestone volume, weight, and project cost from area dimensions, depth, density, and wastage.

Log Weight Calculator

Estimate log weight from species density, tapered dimensions, and quantity using Huber's formula for logs and boards.

Lumber Calculator

Calculate lumber volume, total length, and project cost from piece dimensions and quantity.

Lumber Weight Calculator

Estimate lumber weight and volume by wood species, beam dimensions, and quantity using green wood densities.

Metal Roof Cost Calculator

Estimate metal roof area, panel count, and total material cost from roof and panel dimensions.

Metal Weight Calculator

Calculate metal weight from alloy density, shape, and dimensions. Supports steel, aluminum, copper, brass, and many more materials.

Mortar Calculator

Calculate how many mortar bags you need for bricks or concrete blocks based on piece count, size, and bag yield.

Paver Calculator

Estimate paver count, coverage, and project cost from patio area and paver dimensions with common size presets.

Paver Sand Calculator

Calculate paver sand volume, weight, and cost from patio area and bedding depth for stable paver installations.

Pea Gravel Calculator

Estimate pea gravel volume, weight, bag count, and project cost from area dimensions and depth for patios, pathways, and drainage.

Pipe Volume Calculator

Calculate pipe internal volume and liquid mass from inner diameter and length with metric and imperial units.

Pipe Weight Calculator

Calculate pipe weight and linear density from material, outer diameter, wall thickness, and length for steel, PVC, copper, and more.

Plate Weight Calculator

Calculate plate weight from material density, dimensions, and quantity. Supports rectangular, square, circular plates and custom area.

Plywood Calculator

Calculate how many plywood sheets you need to cover a surface, including waste factor and total material cost.

Pond Calculator

Calculate pond volume, liner dimensions, and liner area for rectangular, oval, round, and triangular ponds.

Pool Calculator

Calculate swimming pool volume in gallons, liters, and cubic feet from pool dimensions and depth.

Post Hole Concrete Calculator

Calculate how much concrete you need for fence post holes. Enter post dimensions, depth, and quantity to get exact concrete volume for cuboid or cylindrical posts.

Rafter Length Calculator

Calculate roof rafter length from rise and run or roof pitch. Also estimate truss count and total roof truss cost for your building project.

Ramp Slope Calculator

Calculate wheelchair ramp slope, length, run, and grade. Enter rise and choose ADA or custom slope ratio to design compliant ramps.

Rebar Calculator

Calculate rebar grid dimensions, total rebar length, number of pieces, and total cost for concrete slab reinforcement. Enter slab size, spacing, and price.

Retaining Wall Calculator

Calculate the number of blocks, gravel volume for backfill, and total cost for your retaining wall project.

Rip Rap Calculator

Calculate rip rap rock size using the Isbash equation and estimate volume and weight for your erosion control project.

River Rock Calculator

Calculate the amount of river rock needed for landscaping, gardens, and pathways.

Rolling Offset Calculator

Calculate pipe rolling offset travel length, true offset, and run for any bend angle. Free online pipe offset calculator for piping and plumbing.

Roof Pitch Calculator

Calculate roof pitch, slope, angle, and rafter length for any roof. Free online roof pitch calculator with rise, run, and pitch ratio.

Roof Shingle Calculator

Calculate how many roof shingles, bundles, and squares you need for your roofing project. Free online roof shingle estimator.

Roof Truss Calculator

Calculate roof truss dimensions, rafter length, truss count, and cost for your roofing project. Free online roof truss calculator.

Sag Calculator

Calculate the sagitta (SAG) of an arc using radius of curvature and chord diameter for suspension design, arches, and construction.

Sand Calculator

Calculate the volume, weight, and cost of sand needed for your construction or landscaping project.

Sealant Calculator

Calculate the amount of sealant needed for construction joints based on joint dimensions and sealant type.

Shiplap Calculator

Calculate the number of shiplap boards needed for your wall or ceiling project based on area and board dimensions.

Siding Calculator

Calculate the amount of siding material needed for your home exterior based on wall area, openings, and siding dimensions.

Size to Weight Rectangular Cuboid Calculator

Calculate the weight of a rectangular cuboid based on its dimensions and material density.

Snow Load Calculator

Calculate roof snow load based on ground snow load, roof pitch, exposure, and thermal factors for building safety.

Sonotube Calculator

Calculate how much concrete you need for Sonotube cylindrical concrete columns. Estimate volume, bags, weight, and cost for your construction project.

Spindle Spacing Calculator

Calculate even spindle spacing for stair and deck railings. Determine number of spindles needed, centered spacing, and end gaps for your railing project.

Spiral Staircase Calculator

Calculate spiral staircase dimensions including tread measurements, number of steps, handrail length, and headroom clearance for your DIY spiral staircase project.

Square Meter Calculator

Calculate area in square meters for any shape including square, rectangle, circle, triangle, pentagon, hexagon, octagon, and custom shapes with our easy-to-use m2 calculator.

Square Yard Calculator

Calculate area in square yards for rectangles, squares, triangles, and circles with material cost and labor estimation for your construction projects.

Square Yards Calculator

Calculate square yards from length and width measurements. Convert between square feet, square yards, and acres with our easy-to-use square yards calculator.

Stair Carpet Calculator

Calculate the exact amount of carpet needed for your stairs including risers, treads, and landings. Free online stair carpet calculator with cost estimation.

Steel Plate Weight Calculator

Calculate the weight of steel plates based on dimensions, shape, and steel type. Free online steel plate weight calculator with multiple shapes and steel alloys.

Steel Weight Calculator

Calculate the weight of steel bars, rods, pipes, plates, and other shapes based on dimensions and steel type. Free online steel weight calculator.

Stone Calculator

Calculate the weight, volume, and cost of stone for construction projects. Free online stone calculator supporting rectangular and circular shapes with multiple stone types.

Thinset Calculator

Calculate how much thinset you need for your tiling project based on area, tile size, and thickness. Free online thinset calculator with bag and cost estimation.

Vertical Curve Calculator

Calculate elevation at any point on a vertical curve for road design and civil engineering projects.

Wainscoting Calculator

Calculate wainscoting panel dimensions, stile spacing, and vertical measurements for your DIY wall project.

Wallpaper Calculator

Calculate how many wallpaper rolls you need for a room based on dimensions, pattern repeat, doors, and windows.

Wall Square Footage Calculator

Calculate the total square footage of walls for painting, wallpapering, or tiling projects.

Wood Beam Span Calculator

Calculate maximum span for wood beams based on species, size, load, and spacing for residential construction.

Scale Calculator

Convert between scaled and real dimensions using map scales, architectural ratios, and scale factors for length, area, and volume.