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Construction calculators and data transformation utilities β all free, all private, all running in your browser. No signup, no uploads, no tracking.
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Construction
Construction Calculators
Accurate material estimates for builders, contractors, and DIYers.
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Board Feet Calculator - Lumber Volume, Weight & CostFree board feet calculator. Instantly calculate lumber volume and cost. Enter thickness, width, length, and quantity for accurate estimates.Open ββ€Construction
Brick Calculator - Bricks, Mortar, Sand & CostFree brick calculator with cost estimation. Calculate bricks, mortar bags, sand, and pallets needed for any wall. Supports 6 brick sizes, bond patterns, and openings.Open ββ§Construction
Concrete Calculator - Cubic Yards, Bags & CostFree concrete calculator. Estimate cubic yards, bag counts (40lb/60lb/80lb), and cost for slabs, footings, and patios. Supports multiple pours and metric.Open ββConstruction
Deck Calculator - Boards, Joists, Beams, Railing & CostFree deck calculator. Calculate exact boards, joists, posts, and screws needed for any deck size. Supports 16 and 24 inch joist spacing.Open ββ₯Construction
Drywall Calculator - Sheets, Mud, Tape, Screws & CostFree drywall calculator with cost estimation. Calculate sheets, joint compound, tape, screws, and cost for any room. Supports 3 sheet sizes and ceiling coverage.Open ββConstruction
Fence Calculator - Posts, Rails, Pickets, Concrete & CostFree fence calculator with cost estimation. Calculate posts, rails, pickets, concrete bags, and material costs for privacy, picket, and rail fences.Open βtConstruction
Gravel Calculator - Tons, Cubic Yards, Cost & CompactionFree gravel calculator with compaction factor and cost estimation. Calculate tons, cubic yards, bag counts, and cost for driveways, pathways, and drainage. Supports 6 gravel sizes.Open βRConstruction
Insulation Calculator - Batts, Blown-In, R-Value & CostFree insulation calculator for attics, walls, and floors. Calculate batts, blown-in bags, thickness, cost, and R-value based on your climate zone. Supports fiberglass, cellulose, spray foam, XPS, and mineral wool.Open ββ¬Construction
Lumber Calculator - Wall Framing Studs, Plates, Headers & CostFree lumber and wall framing calculator. Calculate studs, plates, headers, sheathing, and total cost for wall framing. Includes IRC 2021 header recommendations and board counts.Open βydΒ³Construction
Mulch Calculator - Cubic Yards, Bags & CostFree mulch calculator with cost estimation. Calculate cubic yards, bag counts, and cost for garden beds. Supports multiple beds, circular areas, and bulk pricing.Open ββConstruction
Paint Calculator - How Much Paint Do I Need?Free paint calculator to estimate how much paint you need for any room or wall. Accounts for doors, windows, multiple coats, and waste. Results in gallons or liters.Open ββ°Construction
Siding Calculator - How Many Squares of Siding Do I Need?Free siding calculator. Enter your house dimensions, wall height, gable height, and door and window count to get squares of siding needed and estimated cost.Open ββ¦Construction
Tile Calculator - Tiles, Grout, Thinset & CostFree tile calculator with cost estimation. Calculate tiles, boxes, grout, thinset, and cost for any room. Supports 4 patterns, exclusions, and floor/wall surfaces.Open βAdvertisement
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Data & Text
Data Transformation Tools
Clean, convert, and transform text and data instantly.
βData tool
Add Line NumbersPrefix every line with a line number. Choose 0-indexed or 1-indexed output. Free and private.Open β{ }Data tool
CSV to JSON ConverterConvert CSV data to formatted JSON instantly. Supports headers, custom delimiters, and empty line skipping. All processing happens in your browser.Open ββ§Data tool
Deduplicate ListRemove duplicate lines from any list instantly. Preserve original order or sort results. Optional case-sensitive matching. Free and private.Open βΞData tool
Diff CheckerCompare two blocks of text and see the differences line by line. Free and private.Open β@Data tool
Extract EmailsExtract all email addresses from any block of text. Removes duplicates automatically. Free and private.Open ββData tool
Extract URLsPull all web links from pasted text. Great for scraping links from documents. Free and private.Open ββData tool
Find and ReplaceBulk find and replace across text with support for regular expressions, case sensitivity, and replace-all. Free and private.Open βHEICData tool
HEIC to JPG ConverterConvert iPhone HEIC photos to JPG right in your browser. 100% offline, no upload, no signup β your photos never leave your device.Open βHEICData tool
HEIC to PNG ConverterConvert iPhone HEIC photos to lossless PNG right in your browser. No upload, no signup β your photos never leave your device.Open βAVIFData tool
JPG to AVIF ConverterConvert JPG photos to next-generation AVIF right in your browser. No upload, no signup β your images never leave your device.Open βJPGData tool
JPG to PNG ConverterConvert JPG photos to lossless PNG right in your browser. No upload, no signup β your images never leave your device.Open ββData tool
JSON to CSV ConverterConvert JSON arrays to CSV format instantly. Perfect for exporting data to spreadsheets. All processing happens in your browser.Open βPNGData tool
PNG to JPG ConverterConvert PNG images to compact JPG files right in your browser. 100% offline, no upload, no signup β your images never leave your device.Open βPNGData tool
PNG to WebP ConverterConvert PNG images to compact WebP right in your browser. No upload, no signup β your images never leave your device.Open βΒΆData tool
Remove Empty LinesClean up text by removing blank and whitespace-only lines instantly. Free and private β runs entirely in your browser.Open ββData tool
Sort LinesSort lines alphabetically or numerically, in ascending or descending order. Free and private.Open βAaData tool
Text Case ConverterConvert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case instantly. Free and private.Open β%Data tool
URL Encode / DecodeEncode or decode URL parameters and special characters for safe web transmission. Free and private.Open βWEBPData tool
WebP to JPG ConverterConvert WebP images to universally-supported JPG right in your browser. No upload, no signup β your images never leave your device.Open βWEBPData tool
WebP to PNG ConverterConvert WebP images to lossless PNG right in your browser. 100% offline, no upload, no signup β your images never leave your device.Open βWhy CalcBuild?
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Instant Results
No submit buttons. Results update as you type.
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Mobile-First
Works perfectly on phones, tablets, and desktops.
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Privacy First
Nothing leaves your browser. No tracking, no storage.
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100% Free
No sign-up required. Unlimited use, forever.
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