Free calculators for your home & DIY projects
How much concrete, mulch, paint, gravel or lumber do you really need? Enter your measurements and get quantities, bag counts and costs in seconds. No signup, no fluff.
Concrete, Brick & PavingSlabs, footings, posts, asphalt, block and brick. · 9 toolsLandscaping & GardenMulch, gravel, soil, sod, seed and pavers. · 13 toolsDecks, Roofs & FramingDeck boards, shingles, studs, stairs, lumber. · 9 toolsPaint, Flooring & WallsPaint, wallpaper, flooring, tile and drywall. · 8 toolsHeating, Cooling, Water & PowerAC, heaters, fans, generators, water heaters, pools. · 8 toolsHoliday & SeasonalChristmas lights for trees and rooflines, and more. · 3 toolsArea, Volume & WoodSquare feet, cubic yards, board feet, firewood. · 4 tools
Most-used calculators
- Concrete CalculatorCubic yards and bags for slabs, patios and pads.
- Mulch CalculatorCubic yards or bags of mulch for any bed, with a bulk vs bag cost check.
- Paint CalculatorGallons of paint for a room, with coats, doors and windows.
- Gravel CalculatorTons and cubic yards of gravel, crushed stone or road base.
- Fence Post Concrete CalculatorBags of concrete per post hole, deck post or column.
- Deck Board CalculatorDecking boards, joists and screws for a deck.
- Roofing CalculatorRoof area, squares and shingle bundles from your footprint and pitch.
- AC Size Calculator (BTU)What BTU air conditioner you need for a room.
- Generator Size CalculatorWhat wattage generator you need to run your appliances.
- Retaining Wall CalculatorBlocks, cap blocks, gravel backfill and pipe for a retaining wall.
- Tankless Water Heater CalculatorGPM, BTU and kW needed for a tankless water heater.
- Asphalt CalculatorTons of asphalt and base gravel for a driveway or parking area.
- Christmas Tree Lights CalculatorHow many lights and strands for a Christmas tree of any height.
- Exterior House Paint CalculatorGallons of paint for the outside of a house.
All calculators
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.
Holiday & Seasonal
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.
No calculators match that search. Try a broader word like “concrete” or “paint”.
Guides
- Building a Paver Patio: Base Depth, Sand and Materials NeededHow deep a paver base should be, how much gravel and sand to order for a patio or walkway, and the steps that stop pavers sinking, shifting and heaving.
- Fence Post Spacing, Depth and Concrete: A Practical GuideHow far apart to space fence posts, how deep to set them, how wide to dig the holes, and how much concrete you need for a typical wood fence.
- Gravel: Tons per Cubic Yard and How Much to OrderHow many tons are in a cubic yard of gravel, crushed stone, pea gravel and sand, how to convert between them, and how deep to lay it for paths and driveways.
- How Many Bags of Concrete Do I Need? (Slab & Post Chart)How many 40, 60 and 80 lb bags of concrete you need for a slab, footing or fence post, with charts, the formula, and when ready-mix is the better buy.