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Offline calculator: concrete, rebar, paint, tile & lumber for DIY jobs.
DIY Calc is the free, offline material calculator built for homeowners, DIY enthusiasts, and construction professionals. Get instant, accurate estimates for your renovation and building projects — no internet required, no registration, no subscription. CONCRETE CALCULATOR Calculate the exact amount of concrete you need for slabs, footings, columns, and circular pours. Get results in cubic yards and cubic meters, plus the number of bags (60 lb, 80 lb, 40 kg, or 50 kg). Whether you are pouring a patio, a driveway, or a foundation footing, this concrete calculator gives you fast and reliable results. REBAR CALCULATOR Estimate the total linear feet and weight of rebar for any concrete slab. Enter slab dimensions, bar spacing, and lap splice — get the exact number of 20-foot bars to order. Supports #3, #4, #5, and #6 bar sizes in both imperial and metric units. PAINT CALCULATOR Stop guessing how much paint you need. Enter your wall dimensions, number of coats, and coverage rate — get results in gallons and liters instantly. Supports door and window deductions so you never overpay for paint again. FLOORING AND TILE CALCULATOR Find out exactly how many tiles or floor planks you need for any room. Enter room size and tile dimensions — the calculator adds a customizable wastage allowance (5%, 10%, 15%, or 20%) so you always have enough material to complete the job. LUMBER AND BOARD FEET CALCULATOR Calculate board feet for framing, decking, and finish carpentry. Enter thickness, width, length, and quantity for instant results. Add a price per board foot to get the total material cost for your lumber order. KEY FEATURES - 100% offline — works without internet or Wi-Fi - Supports both imperial (feet, inches) and metric (meters, cm) units - Switch between imperial and metric with one tap - Clean, high-contrast interface — easy to read in sunlight on the job site - Fast and lightweight — no login, no account required - Accurate formulas trusted by contractors and DIY builders worldwide - Results include a 10% waste buffer for safe material ordering WHO IS THIS APP FOR? DIY Calc is designed for homeowners planning a renovation, weekend builders, general contractors, concrete workers, tile setters, painters, carpenters, and anyone who needs fast material estimates on a job site or at the hardware store. Use it before your next trip to Home Depot or Lowe's to calculate exactly how many bags of concrete, gallons of paint, or tiles you need. Stop overspending on materials you do not need. DISCLAIMER All results are estimates for planning and budgeting purposes only. Always verify final quantities with a qualified professional before purchasing materials or beginning construction work.