BuildersCalculators.com

Professional Construction Estimating Tools

Simple, no-frills estimating tools built for real construction math.

Concrete, gravel, rebar, insulation, roofing, framing, flooring, drywall, HVAC, excavation, project cost, rural property, and oddball useful calculators.

Concrete

Slab Calculator

Estimate concrete for a slab.

Length (feet)Width (feet)Thickness (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Footing Calculator

Estimate concrete for a continuous footing.

Length (feet)Width (inches)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Sonotube Calculator

Estimate concrete for round tube forms.

Diameter (inches)Height (feet)Quantity (count)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Concrete Stairs Calculator

Estimate rough concrete volume for stairs.

Stair Width (feet)Total Rise (feet)Total Run (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Concrete Block Fill Calculator

Estimate concrete/grout for filled block cores.

Number of Blocks (count)Fill Per Block (cubic feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Concrete Cost Calculator

Estimate ready-mix concrete cost.

Cubic Yards (yd³)Price Per Cubic Yard ($)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Gravel / Dirt / Material

Gravel Calculator

Estimate gravel volume and tons.

Length (feet)Width (feet)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Topsoil Calculator

Estimate topsoil cubic yards.

Length (feet)Width (feet)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Fill Dirt Calculator

Estimate fill dirt cubic yards.

Length (feet)Width (feet)Depth (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Sand Calculator

Estimate sand cubic yards.

Length (feet)Width (feet)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Mulch Calculator

Estimate mulch cubic yards.

Length (feet)Width (feet)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Asphalt Calculator

Estimate asphalt volume and tons.

Length (feet)Width (feet)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Rebar / Structural

Rebar Grid Calculator

Estimate rebar runs and linear feet.

Slab Length (feet)Slab Width (feet)Spacing (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Rebar Weight Calculator

Estimate total rebar weight.

Total Rebar Length (feet)Weight Per Foot (lb/ft)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Anchor Bolt Spacing

Estimate anchor bolt count.

Wall Length (feet)Bolt Spacing (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Wire Mesh Calculator

Estimate wire mesh sheets.

Slab Area (sq ft)Sheet Coverage (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Beam Load Helper

Simple uniform load estimate.

Beam Span (feet)Uniform Load (lb/ft)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Insulation

Roll Insulation

Estimate insulation rolls needed.

Area to Insulate (sq ft)Coverage Per Roll (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Blown Insulation

Estimate blown insulation bags needed.

Area to Insulate (sq ft)Coverage Per Bag (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Spray Foam

Estimate board feet and kits.

Area (sq ft)Thickness (inches)Kit Yield (board feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

R-Value Calculator

Add insulation layer R-values.

Layer 1 R-Value (R)Layer 2 R-Value (R)Layer 3 R-Value (R)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Attic Heat Loss

Simple heat-loss estimate.

Area (sq ft)Temperature Difference (°F)R-Value (R)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Roofing

Roof Pitch Calculator

Convert rise/run to pitch and angle.

Rise (inches)Run (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Shingle Calculator

Estimate roofing squares and bundles.

Roof Area (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Metal Roofing Calculator

Estimate metal roof panels.

Roof Width (feet)Panel Length (feet)Panel Coverage Width (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Roof Area Calculator

Estimate roof area with pitch factor.

Building Length (feet)Building Width (feet)Pitch Factor (multiplier)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Ridge Vent Calculator

Estimate ridge vent pieces.

Ridge Length (feet)Piece Length (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Lumber / Framing

Board Foot Calculator

Calculate board feet.

Thickness (inches)Width (inches)Length (feet)Quantity (count)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Stud Calculator

Estimate wall studs.

Wall Length (feet)Stud Spacing (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Joist Calculator

Estimate joist count.

Framed Width (feet)Joist Spacing (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Deck Framing Calculator

Estimate joists and deck boards.

Deck Length (feet)Deck Width (feet)Joist Spacing (inches)Deck Board Coverage Width (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Rafter Length Calculator

Estimate common rafter length.

Horizontal Run (feet)Rise (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Stair Stringer Calculator

Estimate steps, actual rise, stringer length, and angle.

Total Rise (inches)Target Step Rise (inches)Tread Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Flooring / Tile

Tile Calculator

Estimate tile quantity.

Area (sq ft)Tile Coverage (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Flooring Calculator

Estimate flooring boxes.

Area (sq ft)Coverage Per Box (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Grout Calculator

Basic grout bag estimate.

Tile Area (sq ft)Coverage Per Bag (sq ft)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Hardwood Estimator

Estimate hardwood boxes.

Area (sq ft)Coverage Per Box (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Laminate Coverage

Estimate laminate boxes.

Area (sq ft)Coverage Per Box (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Paint / Drywall

Paint Calculator

Estimate paint gallons.

Paint Area (sq ft)Coverage Per Gallon (sq ft)Number of Coats (count)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Drywall Sheet Calculator

Estimate drywall sheets.

Wall/Ceiling Area (sq ft)Sheet Coverage (sq ft)Waste Factor (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Joint Compound Calculator

Estimate joint compound buckets.

Drywall Sheets (count)Sheets Per Bucket (count)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Texture Coverage Calculator

Estimate texture material.

Area (sq ft)Coverage Per Unit (sq ft)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Plumbing / HVAC

Pipe Volume Calculator

Estimate liquid volume inside pipe.

Inside Diameter (inches)Pipe Length (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

BTU Calculator

Simple room BTU estimate.

Room Area (sq ft)BTU Per Square Foot (BTU)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Duct Sizing Helper

Estimate duct area from airflow and velocity.

Airflow (CFM)Velocity (FPM)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Water Heater Sizing

Simple peak hot water estimate.

People (count)Gallons Per Person (gal)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Drain Slope Calculator

Estimate total drain fall.

Pipe Run (feet)Slope (inches per foot)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Earthwork / Excavation

Excavation Calculator

Estimate excavation cubic yards.

Length (feet)Width (feet)Depth (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Trench Calculator

Estimate trench excavation volume.

Trench Length (feet)Trench Width (inches)Trench Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Backfill Calculator

Estimate backfill cubic yards.

Length (feet)Width (feet)Depth (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Slope Calculator

Calculate slope percent.

Rise (feet)Run (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Retaining Wall Material Calculator

Estimate retaining wall blocks.

Wall Length (feet)Wall Height (feet)Block Face Area (sq ft)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Project Cost

Labor Cost Calculator

Estimate labor cost.

Labor Hours (hours)Hourly Rate ($)Workers (count)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Markup Calculator

Calculate price after markup.

Cost ($)Markup (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Bid Calculator

Estimate bid with overhead and profit.

Material Cost ($)Labor Cost ($)Overhead (%)Profit (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Profit Margin Calculator

Calculate profit and margin.

Sale/Bid Price ($)Total Cost ($)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Dumpster Size Estimator

Estimate dumpster capacity.

Debris Volume (cubic yards)Extra Capacity (%)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Farming / Rural Property

Fence Calculator

Estimate fence posts and wire rolls.

Fence Length (feet)Post Spacing (feet)Wire Roll Length (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Pasture Seeding Calculator

Estimate seed needed.

Acres (acres)Seed Rate (lb/acre)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Gravel Driveway Calculator

Estimate driveway gravel.

Driveway Length (feet)Driveway Width (feet)Depth (inches)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Culvert Calculator

Estimate culvert pipe pieces.

Required Length (feet)Piece Length (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Pole Barn Estimator

Estimate floor area and posts.

Building Length (feet)Building Width (feet)Post Spacing (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Spray Coverage Calculator

Estimate spray volume.

Acres (acres)Gallons Per Acre (gal/acre)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Oddball Useful

Ladder Angle Calculator

Use the 4:1 ladder rule.

Working Height (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Generator Sizing

Estimate generator wattage.

Running Watts (watts)Largest Startup Surge (watts)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Septic Tank Estimator

Simple septic tank sizing helper.

Bedrooms (count)Gallons Per Bedroom (gal)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Crane Lift Estimator

Basic load moment estimate.

Load Weight (lb)Lift Radius (feet)

Result will appear here.

Estimator only. Field conditions, local codes, waste, product specs, and professional judgment may change final quantities.

Need a calculator we do not have yet?

Send calculator requests, corrections, or tool ideas to:

builderscalc@gmail.com

About BuildersCalculators.com

BuildersCalculators.com provides simple, no-frills estimating tools built for real construction math. The goal is to help builders, contractors, tradesmen, property owners, and do-it-yourself users make quick material and project estimates without digging through complicated spreadsheets.

These calculators are practical field helpers, not engineering approvals. Always verify important quantities, local code requirements, manufacturer specifications, and site conditions before ordering materials or starting work.

Privacy Policy

BuildersCalculators.com is designed as a simple utility website. We do not ask users to create accounts, and the calculators run directly in the browser.

Calculator entries are used only to display results on the page.
If you email us, your email address and message are used only to respond to your request.
Basic hosting, search, and analytics services may collect standard technical information such as browser type, approximate location, referring pages, and pages visited.
Future advertising or analytics tools may use cookies or similar technologies. This policy may be updated if those tools are added.

All calculator results are estimates only. BuildersCalculators.com does not guarantee quantities, costs, code compliance, or job-site suitability.