DIY & Home Calculators
Home improvement stores love it when you guess — because guessing usually means buying too much. Our DIY and home calculators give you exact material estimates for paint, flooring, tile, mulch, fencing, wallpaper, and every other common home project. Enter your room dimensions and get precise quantities with waste factors already included. Know exactly how many gallons of paint to buy, how many boxes of laminate flooring you need, or how many bags of mulch will cover your garden beds. Stop overpaying for leftover materials and stop making extra trips to the store mid-project.
132 calculators available
Box Fill Calculator — NEC Electrical Box Capacity
Calculate NEC 314.16 box fill capacity. Enter box volume, wire gauge, and device count to verify your junction box meets code requirements.
Byte Converter — Convert Between Data Units
Convert bytes, kilobytes, megabytes, gigabytes, terabytes, and more. Instant calculations for file sizes and storage capacity.
Carpet Calculator — Square Yards & Cost Estimator
Calculate how much carpet you need in square yards. Enter room dimensions to estimate carpet area, waste, and total cost for your flooring project.
Circle Skirt Calculator — Determine Fabric Requirements
Calculate fabric needed for circle skirts. Full, half, or quarter circle designs with waist size and length.
Clay Shrinkage Calculator — Wet to Fired Size
Calculate the wet clay size needed for your target fired pottery dimensions. Enter shrinkage rate and fired size for accurate results.
Cleaning Cost Calculator — Estimate Service Pricing
Calculate house cleaning costs based on square footage, cleaning type, frequency, and bathrooms. Get instant per-visit estimates.
Clearance Hole Calculator — Drill Size for Any Bolt
Find the right clearance hole drill size for metric bolts. Pick close, normal, or loose fit and get instant drill bit recommendations.
Color Converter Calculator — RGB, HEX, HSL, CMYK
Convert RGB values to HEX, HSL, and CMYK instantly. Adjust red, green, and blue channels for accurate color conversions across digital and print projects.
Cord Wood Calculator — Estimate Firewood Volume & BTU
Calculate how many cords of firewood you have or need based on stack dimensions. Get volume in cubic feet, cords, and estimated BTU output.
Coronavirus Mask Calculator — Plan Your Mask Supply
Calculate how many face masks you need for your family, office, or facility. Estimate total masks, packs, and monthly cost.
Countersink Depth Calculator — Flush Screw Setup
Calculate exact countersink depth for any screw size and angle. Get flush, professional fastener results every time.
Countertop Calculator — Sq Ft & Material Cost
Calculate countertop square footage and cost for your kitchen or bathroom. Enter dimensions for each section to get total area, material cost, and edge detail
Cross-Stitch Calculator — Estimate Fabric & Thread Requirements
Calculate fabric size, thread length, and project time for cross-stitch patterns.
Crushed Stone Calculator — Tons & Yards for Any Project
Calculate crushed stone in tons or cubic yards. Enter project dimensions for instant driveway, patio, and foundation material estimates.
Curtain Panel Calculator — Panels & Width Needed
Calculate how many curtain panels you need based on window width, panel width, and desired fullness ratio. Get instant panel count recommendations.
Curtain Size Calculator — Perfect Drapes Every Time
Calculate exact curtain width and length for any window. Pick header style and length to get panel dimensions instantly.
Deck Calculator — Boards & Framing
Calculate deck boards, joists, posts, and total lumber needed for your deck project. Get a complete material list and cost estimate for deck construction.
Deck Stain Calculator — Estimate Stain for Your Deck
Calculate exactly how much deck stain you need based on deck dimensions, boards, and railings. Get coverage in gallons and square feet.