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Calcimator

Crown Molding Calculator

Linear feet and miter angles for rooms with corners.

Inputs

%

Results

Room perimeter (ft)

52

Linear ft (with waste)57.2
Pieces to buy8
Miter angle (°)31.62
Bevel angle (°)52
Scarf joints4
Material cost$192.00
Total Cuts10
How to Use This Calculator
  1. Enter Room length (ft), Room width (ft), and Spring angle (°).
  2. Set Cost per linear ft ($), Waste factor (%), and Piece length (ft).
  3. Review the Room perimeter (ft) result.
  4. Use Linear ft (with waste) and Pieces to buy to inform your decision.

How the result changes with Room length (ft)

Room length (ft)Room perimeter (ft)
2166
71166
130284
180384

What each input means

Room length (ft)
Length of the room in feet.
Room width (ft)
Width of the room in feet.
Spring angle (°)
Angle the crown sits off the wall. Common values: 38° (38/52 crown) or 45° (45/45 crown).
Cost per linear ft ($)
Price per linear foot of crown molding.
Waste factor (%)
Extra material for mitered cuts and waste.
Piece length (ft)
Length of each crown molding piece you will purchase.

What each result means

Room perimeter (ft)
Total ceiling perimeter requiring crown molding.
Linear ft (with waste)
Total footage including waste factor.
Pieces to buy
Number of full-length pieces to purchase.
Miter angle (°)
Saw miter setting for 90° inside corners at your spring angle.
Bevel angle (°)
Saw bevel setting for 90° inside corners at your spring angle.
Scarf joints
Mid-wall splice joints needed where walls exceed board length.
Material cost
Estimated cost for crown molding material.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Room length (ft) = 14, Room width (ft) = 12, Spring angle (°) = 38, Cost per linear ft ($) = 3 = 6 input(s) provided
  2. Calculate Room perimeter
    Room perimeter = 2 * (roomLength + roomWidth)
    52 = 52
  3. Calculate Linear ft
    Linear ft = perimeter * (1 + wastePct / 100)
    57.2 = 57.2
  4. Calculate Pieces to buy
    Pieces to buy
    8 = 8

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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