Board Foot Calculator
Find the board feet and cost of hardwood or rough lumber from thickness, width and length.
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Calculators
Home Improvement Calculators
Twenty free tools for estimating materials, volume and equipment size. Each calculator has its own page with the formula, a worked example and answers to common questions. All free, from homesblogs.
Lumber & Woodwork
3 tools · Board feet, trim and curved work.BD FT Calculator
Quick bd ft totals for dimensional lumber like 2×4, 2×8 and 4×4 using nominal sizes.
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Arch Calculator
Find radius, arc length and angle of a segmental arch from its span and rise.
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Concrete & Landscaping
4 tools · Volume for concrete, soil, mulch and gravel.Cubic Yard Calculator
Convert length, width and depth into cubic yards for concrete, soil, mulch or gravel.
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Sonotube Concrete Calculator
Find the concrete volume and bag count for round Sonotube forms and post-hole footings.
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Square Feet to Cubic Yards
Convert an area in square feet and a depth in inches into cubic yards of material.
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Calculate Cubic Yards
Calculate cubic yards for rectangular, circular and triangular areas in one place.
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Flooring & Finishes
5 tools · Floor coverings, coatings, paint and wall panels.Carpet Calculator
Work out square feet, square yards and cost of carpet for a room, including seam waste.
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Epoxy Calculator
Calculate gallons of epoxy floor coating from area, film thickness, solids content and coats.
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Flooring Calculator
Calculate square footage, boxes of flooring and total cost with the right waste for your layout.
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Paint Calculator
Estimate gallons of wall paint for a room after subtracting doors and windows.
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Wainscoting Calculator
Estimate wall panel sheets, cap rail and baseboard for wainscoting around a room.
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Roofing & Exterior
4 tools · Roof area, fences and access ramps.Roof Square Footage Calculator
Estimate roof area, roofing squares and shingle bundles from the house footprint and pitch.
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Fence Calculator
Count posts, rails, sections and concrete bags for a wood fence of any length.
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Fence Picket Calculator
Count how many fence pickets you need from fence length, picket width and spacing.
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Ramp Calculator
Work out ramp length, slope angle and landings from the total rise and slope ratio.
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Heating & Cooling
3 tools · Sizing boilers, furnaces and air conditioners.Boiler Size Calculator
Estimate the heat output a hot-water or steam boiler needs for your home’s size and climate.
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Furnace Size Calculator
Estimate the BTU input rating for a gas furnace from square footage, climate zone and efficiency.
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AC Ton Calculator
Estimate air conditioner size in tons and BTU/h from area, climate, ceiling height and sun.
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Plumbing & Layout
1 tools · Pipe offsets and fitting geometry.Rolling Offset Formula
Solve rolling offsets for pipe: true offset, travel and setback for 45°, 22½°, 60° and 11¼° fittings.
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Lumber & Woodwork
Board Foot Calculator
Find the board feet and cost of hardwood or rough lumber from thickness, width and length.
Open calculator
Concrete & Landscaping
Cubic Yard Calculator
Convert length, width and depth into cubic yards for concrete, soil, mulch or gravel.
Open calculator
Roofing & Exterior
Roof Square Footage Calculator
Estimate roof area, roofing squares and shingle bundles from the house footprint and pitch.
Open calculator
Heating & Cooling
Boiler Size Calculator
Estimate the heat output a hot-water or steam boiler needs for your home’s size and climate.
Open calculator
Flooring & Finishes
Carpet Calculator
Work out square feet, square yards and cost of carpet for a room, including seam waste.
Open calculator
Flooring & Finishes
Epoxy Calculator
Calculate gallons of epoxy floor coating from area, film thickness, solids content and coats.
Open calculator
Roofing & Exterior
Fence Calculator
Count posts, rails, sections and concrete bags for a wood fence of any length.
Open calculator
Flooring & Finishes
Flooring Calculator
Calculate square footage, boxes of flooring and total cost with the right waste for your layout.
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Heating & Cooling
Furnace Size Calculator
Estimate the BTU input rating for a gas furnace from square footage, climate zone and efficiency.
Open calculator
Concrete & Landscaping
Sonotube Concrete Calculator
Find the concrete volume and bag count for round Sonotube forms and post-hole footings.
Open calculator
Roofing & Exterior
Fence Picket Calculator
Count how many fence pickets you need from fence length, picket width and spacing.
Open calculator
Lumber & Woodwork
BD FT Calculator
Quick bd ft totals for dimensional lumber like 2×4, 2×8 and 4×4 using nominal sizes.
Open calculator
Plumbing & Layout
Rolling Offset Formula
Solve rolling offsets for pipe: true offset, travel and setback for 45°, 22½°, 60° and 11¼° fittings.
Open calculator
Concrete & Landscaping
Square Feet to Cubic Yards
Convert an area in square feet and a depth in inches into cubic yards of material.
Open calculator
Concrete & Landscaping
Calculate Cubic Yards
Calculate cubic yards for rectangular, circular and triangular areas in one place.
Open calculator
Flooring & Finishes
Paint Calculator
Estimate gallons of wall paint for a room after subtracting doors and windows.
Open calculator
Heating & Cooling
AC Ton Calculator
Estimate air conditioner size in tons and BTU/h from area, climate, ceiling height and sun.
Open calculator
Lumber & Woodwork
Arch Calculator
Find radius, arc length and angle of a segmental arch from its span and rise.
Open calculator
Roofing & Exterior
Ramp Calculator
Work out ramp length, slope angle and landings from the total rise and slope ratio.
Open calculator
Flooring & Finishes
Wainscoting Calculator
Estimate wall panel sheets, cap rail and baseboard for wainscoting around a room.
Open calculator
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