Concrete & masonry
Estimate concrete, masonry units, mortar, grout, reinforcement and related material quantities.
5 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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5calculators available
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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
Concrete, masonry, paving and asphalt quantity tools for practical construction estimating.
Concrete & MasonryAggregates, Paving & FillMeasurement & Material Estimating
Home Improvement Calculators
Home addition budgeting and renovation planning tools for homeowners and contractors.
Renovation & Structural Projects
Building Trades Calculators
HVAC airflow and duct-sizing tools for building-system planning.
HVAC & Airflow
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 → MaterialsBitumen Calculator
Estimate asphalt paving mix, bitumen binder, pavement layers, coverage, costs and truckloads.
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 → MaterialsLinear Feet Calculator
Calculate linear feet from pieces, runs, perimeter or area, then estimate stock pieces and cost per foot.
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 →Practical guides
Understand the number—not just the result.
Our guides explain formulas, assumptions, examples and edge cases connected to the calculators.
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.
Home guide
Build Up vs. Build Out: Home Addition Costs in 2026
Compare building up versus building out in 2026, including cost ranges, structural work, foundations, roof changes, zoning and worked examples.
Materials guide
CMU Block Sizes and Dimensions: 2026 Guide
Compare common U.S. CMU block sizes, nominal and actual dimensions, wall coverage, unit weight factors, and specialty masonry shapes.
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.
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.
HVAC & airflow
Work through duct dimensions, airflow, velocity, friction and pressure assumptions for HVAC planning.
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 5 tools by category, or open a practical guide when you want to understand the formula first.
