Concrete & masonry
Estimate concrete, masonry units, mortar, grout, reinforcement and related material quantities.
17 calculators live and free
Free calculators for construction, home improvement and building trades.
Estimate material quantities, project costs, dimensions and building-system requirements without wrestling with a spreadsheet. Efficienco gives builders, contractors, homeowners and DIYers clear inputs, instant results and transparent breakdowns.
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Calculator categories
Start with the work you are doing.
Choose the area you are working in, then open one of the calculators currently available.
Construction Materials Calculators
Brick, masonry, reinforcing steel, lumber, aggregates, paving and measurement tools for practical construction estimating.
Concrete & MasonryAggregates, Paving & FillLumber, Drywall & FinishesMeasurement & Material Estimating
Home Improvement Calculators
Home addition budgeting, pool planning and renovation tools for homeowners and contractors.
Renovation & Structural ProjectsExterior Projects
Building Trades Calculators
HVAC airflow and duct-sizing tools for building-system planning.
HVAC & AirflowElectrical & Solar
Popular starting points
Useful calculators, ready now.
Open a tool, adjust the inputs and get a result immediately. Nothing to install and no account to create.
Home
Home Addition Cost Calculator
Estimate home addition costs with editable local rates, itemized low-to-high ranges, permits and contingency. Compare options and save your budget report.
Calculate now → HomePool Salt Calculator
Calculate pool salt additions or dilution from tested ppm, pool volume, product purity and bag size.
Calculate now → MaterialsBitumen Calculator
Estimate asphalt paving-mix tonnage and, separately, its bitumen-binder portion, layers, coverage, costs and truckloads.
Calculate now → MaterialsBrick Calculator
Estimate wall bricks, waste, mortar volume, bags and cost from verified brick and joint dimensions.
Calculate now → MaterialsBuilding Material Calculator
Estimate construction materials from area, wall dimensions, volume, linear length or item count, including waste and package rounding.
Calculate now → MaterialsConcrete Block Calculator
Concrete, cinder block and CMU calculator for wall takeoffs, openings, waste, mortar, grout/core fill, rebar, pallets and costs.
Calculate now → MaterialsCrushed Stone & Stone Tonnage Calculator
Estimate crushed stone and stone tonnage from project dimensions, depth and an editable bulk density.
Calculate now → MaterialsCrusher Run Calculator
Estimate crusher run volume, tonnage, loads and cost for a measured base using explicit density and ordering assumptions.
Calculate now → MaterialsCubic Yards to Tons Calculator
Convert cubic yards and short tons in either direction using an explicit, editable material bulk density.
Calculate now → MaterialsLinear Feet Calculator
Calculate linear feet from pieces, runs, perimeter or area, then estimate stock pieces and cost per foot.
Calculate now → MaterialsLumber Calculator
Estimate lumber boards, purchased length, board feet and optional cost for linear requirements or surface coverage.
Calculate now → MaterialsPea Gravel Calculator
Estimate pea gravel volume, tonnage, bag count and cost from dimensions, depth and editable supplier assumptions.
Calculate now → MaterialsRebar Calculator
Estimate rebar grid counts, total length, stock bars and weight from drawing-specified spacing and cover.
Calculate now → MaterialsRiver Rock Calculator
Estimate river rock or river stone in yards, tons, bags and loads with visible density and allowance assumptions.
Calculate now → MaterialsStud Calculator
Estimate wall studs and plate stock from wall length, spacing, openings and editable framing allowances.
Calculate now → TradeHVAC Duct Calculator
Size round, rectangular and flat-oval HVAC ducts; check airflow capacity, velocity, friction and available pressure with editable assumptions and reports.
Calculate now → TradeRecessed Lighting Calculator
Plan recessed-light grids, fixture count, beam spacing and wall-wash rows from explicit room and product inputs.
Calculate now →Practical guides
Understand the number—not just the result.
Our guides explain formulas, assumptions, examples and edge cases connected to the calculators.
Trade guide
Recessed Lighting Layout Guide 2026: Spacing, Lumens & Can Lights
Plan a recessed lighting layout in 2026 using room dimensions, maximum spacing, lumen targets, ceiling height, beam angle and wall-wash geometry.
Home guide
How Much Does a Home Addition Cost in 2026? Prices by Size and Type
Plan a realistic 2026 home addition budget using cost-per-square-foot ranges, project size, room type, structural work, and overlooked expenses.
Materials guide
How to Estimate Building Materials in 2026: Step-by-Step Guide
Learn how to create a construction material estimate from area, volume, linear length and item counts, including waste, package rounding and cost.
What you can calculate
From a rough question to a usable estimate.
Efficienco connects calculators and practical guides around the same topics, so you can calculate a result and then understand the assumptions behind it.
Paving & aggregates
Estimate asphalt, aggregate, paving, base, fill and related purchasing quantities.
Lumber & finishes
Estimate lumber, sheet goods, drywall and finish-material quantities for building projects.
Measurement & estimating
Convert dimensions and estimate areas, volumes and material quantities for construction planning.
Renovation & structures
Plan renovation and structural-project quantities, scope and preliminary costs with editable assumptions.
Exterior projects
Plan exterior home-improvement quantities and preliminary project requirements.
HVAC & airflow
Work through duct dimensions, airflow, velocity, friction and pressure assumptions for HVAC planning.
Electrical & solar
Calculate practical electrical and solar planning values with explicit inputs and assumptions.
How Efficienco works
Transparent enough to check. Fast enough to use.
A calculator should help you make sense of a problem, not merely produce a confident-looking number.
Enter the real inputs
Inputs use familiar units, practical defaults and visible hints. Change the assumptions that matter for your situation.
Review the breakdown
Results show supporting values and units so you can see how the total was built, copy it and compare scenarios.
Check the context
Related explanations cover formulas, limitations and sources. Professional or safety-critical decisions still deserve qualified review.
Common questions
Before you calculate.
The short version: the tools are free, immediate and designed to make their assumptions visible.
Are Efficienco calculators completely free?
Yes. You can use every live calculator without creating an account or entering payment details.
How accurate are the calculator results?
The arithmetic follows the displayed inputs and assumptions, but the quality of any estimate depends on the information entered and the limits of the model. Product specifications, local prices, regulations and project conditions should be verified when they matter.
Can I use the results for a professional project?
Use the tools for planning, comparison and preliminary estimation. Structural, financial, electrical, mechanical, legal or safety-critical decisions may require current documentation and review by a qualified professional.
What if I find a calculation problem?
Every calculator and guide includes a small problem-report link. Send the page URL and a short description to viaan@efficienco.com so the issue can be investigated.
Find the right calculator and get moving.
Browse all 17 tools by category, or open a practical guide when you want to understand the formula first.
