Framing Calculators - Walls, Floors, Roofs, and Stairs

Framing calculators provide accurate estimates for materials, costs, and dimensions for walls, floors, roofs, and stairs. Calculate the number of studs, joists, rafters, and sheathing required for a project. Roofing tools help determine rafter lengths, truss dimensions, and sheathing coverage. Deck and stair calculators assist in planning step rise, run, and stringer spacing. Whether working on residential or commercial framing, these tools help optimize material use and construction efficiency.

• Foot and Inch to Inches, Inches to Foot and Inch

Wall and Floor Framing Calculators

Use these calculators for figuring out the number of materials you need to do various framing jobs. Includes calculators for wall materials like studs and plywood, materials for building stairs, decks, and the amount of sheathing you require for a roof.

• Exterior Wall Sheathing + Cost Calculator Estimate sheathing area, sheets, and total cost based on wall size, openings, and sheath price.
• Gable Wall Upper Plate Length Calculate the diagonal plate length from the slope ratio and bottom plate length in feet and inches.
• Gable (Rake) Wall Framing - Wall Height Find peak height of a rake wall using slope, plate length, and lower wall height.
• Plywood or OSB Sheathing Cost Comparing Calculator Compare sheathing costs using plywood or OSB by entering wall size and material prices.
• Plywood Sheathing # of Sheets for Wall or Floor Calculator Calculate wall area, subtract openings, and estimate sheathing cost by sheet price.
• Steel Stud Wall Estimate steel studs and 10-foot tracks needed based on wall length and stud spacing.
• Stud Count Find number of studs needed using wall length and on-center spacing.
• Stud Length Increase - Gable Wall Framing Calculate stud length increase for gable walls based on slope and spacing.
• Stud Wall Framing Calculator + Cost Get studs, plates, and material costs using wall length, stud spacing, corners, and prices.
• Sub Floor Material Calculator Estimate joist length, rimboard, sheathing, glue, and screws based on floor size and spacing.
• Stud Wall Framing Material Calculator Calculate studs, plates, sheathing, and area from wall size, spacing, corners, and partitions.
• Wall Framing Calculator (mulitple walls) Estimate framing needs for walls with windows and doors using spacing, wall size, and features.
• Wall Section, Stud and Plate Cost (Metric) Estimate studs, plate length in metres, and cost using metric wall size, spacing, and prices.

Deck Framing

Estimate the materials needed to build a deck. Includes calculators for the framing materials and the deck railings.

• Deck Material plus Cost for Joist and Decking Estimate joists, beams, decking boards, lineal footage, and total cost based on deck size, spacing, board width, and material prices.
• Deck Material, Joist plus Decking Calculate joists, beams, and decking board quantities in lineal feet based on deck size, joist spacing, board width, and beam ply.
• Number of Pales Needed for a Deck Railing Calculate the number of pales, posts, and railing length based on deck size, pale width, and maximum post spacing.
• Drop in Inches from a Slope in a Percentage Calculate the elevation drop in inches over a given length using a slope expressed as a percentage.

Roof Framing

Estimate the materials needed for stick framing a roof plus calculators for plywood or OSB sheathing needed.

• Birdsmouth Cut, The HeelCalculate maximum heel and seat cuts for rafters based on pitch, rafter depth, and top plate width while automatically adjusting to meet code limits.
• Birdsmouth: Heel Cut, Seat CutCalculate heel cut, notch depth, and remaining rafter depth based on roof pitch, seat cut, and rafter size while ensuring code-compliant cuts.
• Birdsmouth Seat CutCalculate the seat cut, notch depth, and remaining rafter depth based on roof pitch, heel cut, wall width, and rafter size to ensure safe framing.
• Convert a Roof Pitch to an AngleConvert roof slope (rise over 12 inches) into degrees using trigonometric calculation with adjustable decimal precision.
• Heel Cut of a BirdsmouthDetermine the maximum heel cut length based on roof pitch, rafter depth, and code-based notch limits to ensure safe and code-compliant rafter cuts.
• Heel Cut Length - MetricCalculate heel and seat cuts in millimetres based on roof pitch, rafter depth, and top plate width, with auto-adjustments to meet framing standards.
• Height Above Plate (HAP) with Heel Cut DepthCalculate the height above the top plate based on roof pitch, rafter depth, and heel cut, with outputs for seat cut length and HAP in inches.
• Height Calculation for a Common TrussCalculate the total truss height from building width, roof pitch, and heel height, with results in inches and feet-and-inches.
• Rafter LengthCalculate total rafter length from building width, overhang, ridgeboard thickness, and roof pitch, with results in feet, inches, and degrees.
• Rafter Length (Metric)Calculate rafter length in metres and millimetres using building width, overhang, ridgeboard thickness, and roof slope in degrees.
• Rafter Length Calculated in Metres (with rise, run, post height, birdsmouth)Calculate rafter run, rise, full-length, heel cut, HAP, and ridge/post height using roof slope in degrees and metric inputs for precise framing.
• Rafter Lengths, Hip and CommonCalculate common and hip rafter lengths from building width, overhang, ridgeboard thickness, and roof pitch, with results in feet and inches.
• Rafter Length (with rise, run, post height, birdsmouth)Calculate rafter run, rise, full-length, diagonal A-B, heel cut, HAP, ridge height, and post height using building width, pitch, and seat cut.
• Roof MeasurementCalculate total roof area and number of roofing squares using building size, overhangs, and roof pitch-ideal for estimating material needs.
• Roof PitchCalculate roof pitch as a ratio, grade percentage, and angle in degrees using rise and run measurements in feet and inches.
• Roof Sheathing - Gable (Imperial)Estimate roof area and number of 4x8 plywood sheets needed, including waste, based on building size, overhangs, roof pitch, and waste percentage.
• Roof Sheathing - Gable (Metric)Estimate roof area and number of plywood sheets needed, including waste, using metric inputs for building size, overhangs, and roof pitch.
• Roof Sheathing - Hip Roof (Imperial)Estimate total roof area and number of 4x8 plywood sheets needed for a hip roof, including waste, using building size, overhang, pitch, and waste percentage.
• Roof Sheathing - Mansard (Imperial)Calculate total roof area and number of 4x8 plywood sheets needed for a mansard roof, including upper and lower slopes, overhangs, and waste factor.
• Roof Sheathing - Shed (Imperial)Estimate roof area and number of 4x8 plywood sheets needed for a shed roof using building dimensions, overhangs, pitch, and waste percentage.
• Slope, Roof, Hip Valley, Height and Width FactorsQuick-reference guide to calculating roof dimensions, bevel cuts, and rafter lengths using slope-related factors:

Stair Calculators

Calculators to help you with the lay out of your stairs and the materials needed.

• Stair Riser HeightQuickly calculate stair riser height based on total rise and your chosen number of risers.
• Rough Framing, Stairs Material Plus CostEstimate materials and total cost for constructing stairs with closed risers, including treads, stringers, and risers.
• Number of Stair Risers Based on Building CodeDetermine the range of risers allowed for a staircase based on total rise and local code limits in inches.
• Number of Stair Risers Based on Building Code (Metric)Determine minimum and maximum riser count using total rise in metres and code-based riser limits in centimetres.
• Stair Design CalculatorCalculate stair riser height, slope, total run, stringer length, and required floor opening based on stair layout and building dimensions.
• Stair Slope in Degrees and Rise and Run RelationshipsAnalyze stair slopes in degrees and check rise/run relationships against best practice and code guidelines.
• Stair Well Floor Opening SizeCalculate the minimum required floor opening length based on stair rise, run, headroom, floor thickness, and nosing.
• Stringer Length CalculatorCalculate stair stringer length, riser height, and total run based on total rise, number of risers, and tread run depth.

How To:

• Calculate Square FootageLearn to compute square or rectangular area in square feet and estimate plywood sheets needed for coverage.
• Square your FootingsLearn how to square footing forms on level or sloped ground using setback measurements, diagonal checks, and the 3-4-5 method.
• Layout House for FramingStart all wall, stud, joist, and floor layouts from one consistent corner to ensure alignment, accuracy, and easier plumbing and HVAC installations.
• Plywood or OSB SheathingWall and roof sheathing using plywood or OSB; thickness and fastening must follow building code.

Slopes Grades and Angles

• Angle from Rise Divided by RunCalculates angle in degrees using rise and run measurements with arctangent function.
• Angle to Grade PercentageConverts an angle in degrees to slope percentage using the tangent function.
• Angle to PitchConverts a roof angle in degrees to a rise-in-12 roof pitch using the tangent function.
• Arctan Function using Rise & RunCalculates the angle in degrees or radians from rise and run using the arctangent (Atan) function.
• Grade in Percentage to Angle in DegreesConverts slope given as a percentage into an angle in degrees and radians using the arctangent function.
• Pitch to AngleConverts roof pitch (rise over 12 inches) into the roof angle in degrees.
• Roof Pitch to AngleConverts a rise-in-12 roof pitch into degrees using arctangent for precise roof slope angle.