Construction
Concrete, paint, flooring, roofing — estimate materials before you build.
Browse 9 free construction tools that run entirely in your browser. No signup, no uploads, and no data stored — everything calculates or processes locally on your device. Use these tools for quick calculations, conversions, and everyday tasks with clear explanations and FAQs on every page.
Concrete Calculator
Cubic yards of concrete and number of bags for any slab or footing.
Paint Calculator
Gallons of paint needed for a room, with door and window deductions.
Flooring Calculator
Square feet of flooring with waste allowance and box count.
Gravel Calculator
Cubic yards and tons of gravel for driveways, paths, and landscaping.
Mulch Calculator
Cubic yards and bags of mulch for garden beds and landscaping.
Fence Calculator
Posts, rails, and pickets needed for any wood fence.
Roof Pitch Calculator
Roof pitch in X:12, degrees, and area multiplier from rise and run.
Staircase Calculator
Steps, riser height, and total run for building a staircase.
Concrete Volume Calculator
Calculate concrete volume for slabs, footings, and columns.
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Mortgage Calculator
See your monthly payment, total interest, and PMI risk for any home loan.
Finance & MoneyLoan Calculator
Monthly payment, total interest, and total cost for any fixed-rate loan.
Health & FitnessBMI Calculator
Body mass index, WHO category, and your healthy weight range.
Math & EducationPercentage Calculator
Percent of a number, percent one number is of another, and percent change.
Developer ToolsJSON Formatter & Validator
Format, validate, and minify JSON with precise error messages.
Text ToolsWord Counter
Words, characters, sentences, paragraphs, and reading time — live.
PDF ToolsMerge PDF
Combine several PDF files into one, in any order.
Image ToolsImage Compressor
Shrink image file size with a live quality preview.