All calculators
59 free calculators for home improvement, landscaping and DIY projects.
Concrete, Brick & Paving
- Concrete CalculatorCubic yards and bags for slabs, patios and pads.
- Concrete Footing CalculatorConcrete for continuous footings, piers and pads.
- Fence Post Concrete CalculatorBags of concrete per post hole, deck post or column.
- Concrete Block CalculatorNumber of cinder / CMU blocks and mortar for a wall.
- Rebar CalculatorRebar grid for a slab: bars, linear feet and weight.
- Asphalt CalculatorTons of asphalt and base gravel for a driveway or parking area.
- Retaining Wall CalculatorBlocks, cap blocks, gravel backfill and pipe for a retaining wall.
- Brick CalculatorNumber of bricks and pallets for a wall, patio or veneer.
- Sonotube (Concrete Tube) CalculatorConcrete for round footings and columns by tube size and height.
Landscaping & Garden
- Mulch CalculatorCubic yards or bags of mulch for any bed, with a bulk vs bag cost check.
- Gravel CalculatorTons and cubic yards of gravel, crushed stone or road base.
- Topsoil CalculatorCubic yards, tons and bags of topsoil, compost or fill.
- Raised Bed Soil CalculatorHow much soil and mix for raised garden beds.
- Sod CalculatorSquare feet, rolls and pallets of sod for a lawn.
- Grass Seed CalculatorPounds of grass seed for a new lawn or overseeding.
- Paver CalculatorPavers, base gravel and sand for a patio or walkway.
- Fence CalculatorPosts, rails, pickets and concrete for a fence run.
- French Drain CalculatorGravel, pipe and fabric for a French drain trench.
- Lawn Fertilizer CalculatorPounds of fertilizer for your lawn, from its N-P-K label.
- Plant Spacing CalculatorHow many plants fit a bed at a given spacing.
- Chicken Coop Size CalculatorCoop, run, roost and nesting box space for your flock.
- Planter & Container Soil CalculatorQuarts and cubic feet of potting soil for pots and planters.
Decks, Roofs & Framing
- Deck Board CalculatorDecking boards, joists and screws for a deck.
- Roofing CalculatorRoof area, squares and shingle bundles from your footprint and pitch.
- Roof Pitch CalculatorPitch, angle, slope percent and rafter length.
- Wall Stud CalculatorStuds, plates and sheathing for a framed wall.
- Stair CalculatorRisers, treads, run and stringer length for a staircase.
- Attic Ventilation CalculatorIntake and exhaust vent area, ridge vent length and soffit vents.
- Deck Stain CalculatorGallons of deck stain or sealer for a deck and railings.
- Wheelchair Ramp CalculatorRamp length, landings and runs for a given rise.
- Attic Insulation CalculatorDepth and volume of insulation to reach a target R-value.
Paint, Flooring & Walls
- Paint CalculatorGallons of paint for a room, with coats, doors and windows.
- Wallpaper CalculatorRolls of wallpaper for a room, with pattern waste.
- Flooring CalculatorBoxes of laminate, vinyl plank or hardwood for a room.
- Tile CalculatorTiles, boxes, grout and thinset for a floor or wall.
- Drywall CalculatorSheets of drywall, screws, tape and joint compound.
- Lumens CalculatorHow many lumens and bulbs a room needs.
- Baseboard & Trim CalculatorLinear feet and boards of baseboard or crown molding for a room.
- Exterior House Paint CalculatorGallons of paint for the outside of a house.
Heating, Cooling, Water & Power
- AC Size Calculator (BTU)What BTU air conditioner you need for a room.
- Space Heater Size CalculatorWatts of heater for a room, plus running cost.
- Pool Volume CalculatorGallons in a rectangular, round or oval pool.
- Rainwater Collection CalculatorGallons you can collect from a roof, and how many rain barrels.
- Generator Size CalculatorWhat wattage generator you need to run your appliances.
- Tankless Water Heater CalculatorGPM, BTU and kW needed for a tankless water heater.
- Ceiling Fan Size CalculatorBlade span and downrod length for a room.
- Water Softener Size CalculatorGrain capacity of softener for your household and water hardness.
- Portable Power Station Size CalculatorBattery capacity (Wh) and output (W) to run your devices, plus solar panels.
- Battery & Power Station Runtime CalculatorHow many hours a battery or power station will run a device.
- Furnace Size CalculatorBTU output and input rating of a furnace for your house.
Holiday & Seasonal
- Christmas Tree Lights CalculatorHow many lights and strands for a Christmas tree of any height.
- Outdoor Christmas Lights CalculatorBulbs, strands and clips to outline a roofline, windows or railing.
- Christmas Lights Circuit Load CalculatorHow many strands one outlet or circuit can safely run.
- Christmas Lights Electricity Cost CalculatorWhat your holiday lights cost to run, LED vs incandescent.
- How Much Firewood Do I Need for Winter?Cords of firewood to heat a house, by climate, stove and wood type.
Area, Volume & Wood
- Square Footage CalculatorArea of a rectangle, triangle, circle, trapezoid or ellipse.
- Cubic Yard CalculatorCubic yards, cubic feet and weight for any material.
- Board Foot CalculatorBoard feet and cost of lumber from thickness, width and length.
- Firewood Cord CalculatorCords and face cords in a stack of firewood.