Construction Calculators
for Site Work
Formula-based calculators for concrete, masonry, rebar, aggregates, asphalt, drainage, excavation, slope, layout, structural checks, outdoor structures, fabrication, and construction unit conversions.
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Type a tool name or category. Matching calculator links appear in the index below.
Popular Construction Calculators
Common calculators for material takeoffs, volume estimates, slope checks, paving work, drainage, decking, and fabrication planning.
Concrete Calculator
Concrete calculator for slabs, footings, post holes, circular pours, and tube/ring shapes.
PopularCubic Yard Calculator
Cubic Yard Calculator estimates cu yd from length, width, depth, shape, quantity,
PopularPea Gravel Calculator
Pea gravel calculator estimates cubic yards, tons, cubic feet, bags, and material
PopularPercent Slope Calculator
Percent Slope Calculator calculates grade percentage from vertical rise and horizontal run
PopularPipe Slope Calculator
Pipe Slope Calculator for finding slope from run and fall, with pitch,
PopularRoad Base Calculator
Road Base Calculator to estimate tons, cubic yards, loose spread depth, truck
PopularFrench Drain Calculator
French Drain Calculator estimates gravel volume, US tons or tonnes, fabric area,
PopularBeam Deflection Calculator
Simply Supported Beam Deflection Calculator to find mid-span deflection, max bending moment,
Latest Calculators
New tools added to the library across drainage, sitework, fabrication, layout, and outdoor structures.
Square Meter Calculator
Square Meter Calculator finds sq m area from meters, cm, mm, feet,
NewSquare Yard Calculator
Square Yard Calculator converts length and width or known area into sq
NewSquare Footage Calculator
Square Footage Calculator calculates sq ft, sq yd, sq in, perimeter, acres,
NewSquare Feet to Cubic Yards Calculator
Square Feet to Cubic Yards Calculator converts sq ft and depth into
NewGallons per Square Foot Calculator
Gallons per Square Foot Calculator estimates gal/sq ft, total gallons, coverage rate,
NewBoard Foot Calculator
Board Foot Calculator calculates lumber board feet from thickness, width, length, quantity,
NewCountersink Depth Calculator
Countersink Depth Calculator finds axial plunge depth from countersink diameter, through-hole diameter,
NewBolt Circle Calculator
Bolt Circle Calculator finds BCD hole coordinates, angle step, pitch radius, and
Construction Calculator Categories
Choose a category when you know the job type: concrete, masonry, aggregate base, drainage slope, excavation, structures, outdoor builds, or fabrication.
Concrete, Cement, Masonry & Rebar
Estimate concrete, cement, brick, block, grout, rebar, columns, stairs, sonotubes, retaining walls, and masonry material quantities.
- Brick Calculator
- Rebar Calculator
- Retaining Wall Calculator
- Sonotube Calculator
- Cement Calculator
- Concrete Calculator
Aggregates, Stone, Sand & Base
Calculate gravel, crushed stone, limestone, rip rap, river rock, paver sand, polymeric sand, road base, and stone weight.
- Pea Gravel Calculator
- Crushed Stone Calculator
- Limestone Calculator
- Rip Rap Calculator
- River Rock Calculator
- Paver Sand Calculator
Driveway, Paving & Sitework
Plan asphalt, cold patch, concrete and gravel driveways, pavers, cut and fill, excavation productivity, infiltration, and site slopes.
- Cut And Fill Calculator
- Excavator Productivity Calculator
- Driveway Slope Calculator
- Asphalt Calculator
- Gravel Driveway Calculator
- Paver Calculator
Layout, Grade, Angles & Stairs
Convert rise, run, slope, grade, angle, elevation, ramps, stairs, miter cuts, vertical curves, and layout geometry.
- 3-4-5 Rule Calculator
- Percent Slope Calculator
- Ramp Slope Calculator
- Stair Calculator
- Miter Angle Calculator
- Vertical Curve Calculator
Plumbing, Drainage, Water & Tank
Find pipe slope, drainage fall, flow rate, pipe volume, tank volume, pond and pool volumes, French drain quantities, and rolling offsets.
- Sewer Line Slope Calculator
- Pipe Slope Calculator
- French Drain Calculator
- Drainage Fall Calculator
- Tank Volume Calculator
- Gutter Slope Calculator
Structural Loads & Forces
Preliminary checks for ground pressure, bearing pressure, beam load, beam deflection, bending stress, punch force, and rivet length.
- Ground Pressure Calculator
- Bearing Pressure Calculator
- Beam Deflection Calculator
- Beam Load Calculator
- Bending Stress Calculator
- Punch Force Calculator
Deck, Fence & Outdoor Structures
Estimate deck slope, deck stain, decking, fences, post depth, pickets, balusters, sheds, coops, hoop houses, and round pens.
- Decking Calculator
- Wood Fence Calculator
- Fence Picket Calculator
- Round Pen Calculator
- DIY Shed Cost Calculator
- Baluster Calculator
Mechanical, Fastener & Fabrication
Shop calculators for clearance holes, bolt torque, carbon equivalent, K-factor, material removal rate, pitch diameter, threads, welding, and countersinks.
- Clearance Hole Calculator
- Bolt Torque Calculator
- Welding Calculator
- Thread Calculator
- K-Factor Calculator
- Countersink Depth Calculator
Measurement, Quantity & Conversion
Convert and estimate board feet, cubic yards, gallons per square foot, and other quantity measurements used across construction planning.
View all in index →Pick the calculator that matches the result you need
The best calculator is the one that matches the actual output: cubic yards, tons, slope percent, fall per foot, gallons, board feet, pressure, torque, pitch, or material count.
Formula-based outputs
Calculator pages are built around deterministic formulas, unit conversions, and result cards that show the exact estimate being produced.
Construction units
Use field-friendly measurements: feet, inches, yards, meters, cubic yards, tons, gallons, slope ratios, percent grade, and angles.
Estimate limits
Site conditions, density, compaction, product coverage, waste, and local requirements can change final quantities. Verify critical work before ordering.
Concrete, Cement, Masonry & Rebar
Estimate concrete, cement, brick, block, grout, rebar, columns, stairs, sonotubes, retaining walls, and masonry quantities.
- Brick Calculator
- Rebar Calculator
- Retaining Wall Calculator
- Sonotube Calculator
- Cement Calculator
- Concrete Calculator
- Concrete Block Calculator
- Concrete Block Fill Calculator
- Concrete Column Calculator
- Concrete Stairs Calculator
- CMU Grout Calculator
- Round Hole Volume Calculator
- Tile Mortar Calculator
- Concrete Slope Calculator
- Retaining Wall Slope Calculator
Aggregates, Stone, Sand & Base
Calculate gravel, crushed stone, limestone, rip rap, river rock, paver sand, polymeric sand, road base, and stone weight.
Driveway, Paving & Sitework
Plan asphalt, cold patch, concrete and gravel driveways, pavers, cut and fill, excavation productivity, infiltration, and site slopes.
Layout, Grade, Angles & Stairs
Convert rise, run, slope, grade, angle, elevation, ramps, stairs, miter cuts, vertical curves, and layout geometry.
- 3-4-5 Rule Calculator
- Percent Slope Calculator
- Ramp Slope Calculator
- Slope Per Foot Calculator
- Grade Slope Calculator
- Elevation Calculator Construction
- Sidewalk Slope Calculator
- SAG Calculator
- Spiral Staircase Calculator
- Arch Calculator
- Floor Area Ratio Calculator
- Ladder Angle Calculator
- Ramp Calculator
- Stair Calculator
- Angle Cut Calculator
- Angle of Depression Calculator
- Bowl Segment Calculator
- Elevation Grade Calculator
- Miter Angle Calculator
- Vertical Curve Calculator
Plumbing, Drainage, Water & Tank
Pipe slope, drainage fall, flow rate, pipe volume, tank volume, pond and pool volumes, French drain quantities, and rolling offsets.
- Sewer Line Slope Calculator
- Gutter Slope Calculator
- Shower Pan Slope Calculator
- Drainage Fall Calculator
- Pipe Slope Calculator
- Soil Pipe Fall Calculator
- Pool Slope Calculator
- Channel Slope Calculator
- French Drain Calculator
- Rolling Offset Calculator
- Fire Flow Calculator
- Gallons Per Minute Calculator
- Liters per Minute Calculator
- Pipe Volume Calculator
- Pond Calculator
- Pool Calculator
- Tank Volume Calculator
Structural Loads & Forces
Preliminary checks for ground pressure, bearing pressure, beam load, deflection, bending stress, punch force, and rivet length.
Deck, Fence & Outdoor Structures
Deck slope, stain, fences, post depth, pickets, balusters, sheds, coops, hoop houses, and round pens.
- Deck Slope Calculator
- Wood Fence Calculator
- Vinyl Fence Cost Calculator
- Fence Picket Calculator
- Round Pen Calculator
- Hoop House Calculator
- Fence Post Depth Calculator
- Rectangle Fence Perimeter Calculator
- Fence Calculator
- Deck Stain Calculator
- Chicken Coop Size Calculator
- Spindle Spacing Calculator
- DIY Shed Cost Calculator
- Decking Calculator
- Baluster Calculator
Mechanical, Fastener & Fabrication
Clearance holes, bolt torque, carbon equivalent, K-factor, material removal rate, pitch diameter, threads, welding, bolt circles, countersinks.
- Clearance Hole Calculator
- Bolt Torque Calculator
- Carbon Equivalent Calculator
- K-Factor Calculator
- Material Removal Rate Calculator
- Pitch Diameter Calculator
- Spindle Speed Calculator
- Taper Calculator
- Thread Calculator
- Thread Pitch Calculator
- True Position Calculator
- Welding Calculator
- Bolt Circle Calculator
- Countersink Depth Calculator
Measurement, Quantity & Conversion
Board feet, cubic yards, gallons per square foot, and other quantity measurements used across construction planning.
From the Blog
Practical guides on estimating materials, reading slopes, planning drainage, and using construction formulas in the field.
About CalcFormula
CalcFormula is a construction calculator resource for tradespeople, contractors, estimators, engineers, DIY builders, and site planners who need quick material, slope, quantity, and unit estimates.
- Calculator pages focus on the formula, inputs, result labels, assumptions, and practical use case.
- Results are meant for planning and estimating, not final engineering, code, or supplier approval.
- Tools are grouped by task so you can move from one related calculator to the next.
Important estimating note
Construction quantities can vary because of field measurements, compaction, waste, cutting loss, moisture, product density, application method, local code, and supplier coverage data.