Home Reno & DIY Calculators

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About this app

Home Reno & DIY Calculators puts 115 construction and home-improvement calculators in one fast, free app. Whether you're pouring a slab, ordering gravel, sizing an AC, or estimating a paint job, get the number you need in seconds — no sign-up, works offline.

MEASURE & AREA
• Square footage calculator — rooms, walls, multiple rooms, odd shapes
• Cubic yard, cubic feet and volume calculators
• Square feet to linear feet, board feet, square meters

CONCRETE & MASONRY
• Concrete slab, footing, column and sonotube calculators
• Bags of concrete (40/50/60/80 lb) and cost per yard
• Block, brick, mortar and paver calculators

LANDSCAPING & AGGREGATE
• Gravel, crushed stone and sand calculators (yards and tons)
• Mulch, topsoil, dirt and compost calculators
• Retaining wall and paver base calculators

DECKS, FENCES & STRUCTURES
• Deck board, joist, footing and stair calculators
• Deck and fence cost estimators
• Fence post, picket and baluster spacing

ROOFING
• Roofing squares and shingle bundle calculator
• Roof pitch, rise/run and rafter length calculator
• Roof replacement cost estimator

PAINT & INTERIOR FINISHING
• Paint calculator by square footage, coats and coverage
• Drywall / sheetrock and joint compound calculators
• Tile, backsplash and wallpaper calculators

HVAC & ENERGY
• BTU calculator and AC tonnage / unit size calculator
• Furnace and heat pump sizing
• kWh cost calculator, electricity bill and appliance cost
• Generator sizing calculator

POOL & SPA
• Pool volume / gallons calculator (rectangle, round, oval, kidney)
• Salt, chlorine, shock and pH balancing calculators
• Pool heater sizing

SOLAR & ELECTRICAL
• Solar panel system sizing and battery bank calculator
• Solar panel angle by location
• Wire size, voltage drop, conduit fill and Ohm's law

HOME INSURANCE & COST
• Home replacement / rebuild cost calculator
• Dwelling coverage and PMI calculators

Plus insulation R-value, ADA ramp slope, recessed lighting layout, lumber and framing calculators, and dozens more.

WHY CALCS.HOMES
• 115 calculators, one download
• Clean, fast, no clutter
• Works offline
• Free

More at https://calcs.homes

What’s new

Bug fix: some extreme or zero-value inputs (e.g. very large numbers, zero spacing/dimensions) could crash a calculator. All 115 calculators now handle these inputs safely and show 0 instead of crashing.