window-treatments
Inside vs. Outside Mount Blinds: Casing Depth & Measurement Rules
How to measure for inside mount and outside mount window blinds. Includes bracket casing depth requirements, factory deductions, and light gap solutions.
Architectural Measurement Studio • US Imperial & Metric
Measure Confidently.
Plan Beautifully.
Buy the Right Size.
Eliminate costly furniture returns and awkward room layouts. Use our free, client-side visual studios to calculate drapery fullness, compare rug dimensions side-by-side, check doorway fits, and map gallery wall nail marks.
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ADA & NKBA True Clearance Math
Interactive Room Elevation
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Curtain Rod Placement & Stack-Back
Rule 1 of 3Mount rod 4″–8″ above the window frame and extend 8″–12″ past each side. This allows open curtain panels to stack clear of the glass, maximizing natural daylight.
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Interactive Design Workflows
What are you planning today?
Select your project to launch calibrated 2D visualizers, accurate formulas, and printable checklists.
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New Studio
Product Fit & Clearance
Check if that sofa, table, or bed physically fits before ordering. Tests doorway clearance, rotations, and 36″ walkways.
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Side-by-Side
Rug Comparison Studio
Compare 5×7, 8×10, and 9×12 rugs simultaneously. See bare floor perimeter margins and furniture contact in 2D.
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Fullness Math
Curtain & Drapes Sizer
Calculate exact fabric fullness (1.5×–3.0×), retail panel quantities, rod overhang extensions, and finished lengths.
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Nail Map
Gallery Wall Planner
Arrange mixed frames with custom spacing and hanger offsets. Generates exact floor-to-nail coordinates.
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Bevel Math
Frame & Mat Calculator
Calculate custom mat openings, 1/8″ rabbet overlaps, optical bottom weighting, and exterior frame dimensions.
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Ergonomics
Furniture Spacing Planner
Verify 36″ circulation corridors, 14″–18″ coffee table reach, and SMPTE/THX 4K TV viewing distances.
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Pattern Repeat
Wallpaper Roll Estimator
Factor pattern repeat drop match, ceiling heights, door/window deductions, and 15% trimming waste.
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Depth Check
Blinds Inside vs. Outside Mount
Check casing depth requirements for flush bracket mounting or calculate outside overlap coverage.
🏠 Connected Multi-Room Studio • 100% Local-First
Measure Your Room Once.
Use Everywhere.
Tired of retyping room dimensions across different calculators? In DecorMeasure's Room Studio, enter your walls, windows, doors, and fireplace hearths once. They automatically sync into your rug, curtain, and furniture spacing planners.
Open Shared Room Workspace →
Stored safely in browser storage • Zero tracking
Main Living Room (14′ × 18′) Synced
Front Window Trim: 72″ W × 60″ H
Entry Door Opening: 36″ W (Inward Swing)
Fireplace Hearth Obstacle: 60″ × 18″ Flush East
Recommended Rug Size: 8′ × 10′ or 9′ × 12′
Active in 4 Tools Manage Room →
Visualizing Sizing Mistakes
Compare: Common Mistakes vs. Architectural Standards
Toggle between typical sizing errors and recommended architectural solutions to see why proportions matter.
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Common Mistake
Rod Mounted on Trim, Zero Stack-Back
Mounting the rod right on the window frame and choosing rod width equal to the window blocks 30% of natural light with bunched drapery. The window feels small and the ceiling low.
Result: 24″ of glass covered by stacked fabric
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Architectural Standard
Mounted High & 8″–12″ Beyond Trim
Mount rod 4″–8″ above the frame (or halfway to ceiling) and extend 8″–12″ past sides. Drapes stack clear of the glass when open, making the window look grand and ceilings taller.
Result: 100% of glass exposed + 2× fullness
Architectural Standards
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Illustrated Measurement Guides
Authoritative, worked mathematical examples with zero fluff or keyword stuffing.
furniture-spacing
Residential Hallway & Entryway Clearances: The Architectural Circulation Guide
Ergonomic standards and ADA circulation guidelines for residential hallways, door swings, entryway consoles, and runner rug margins.
furniture-spacing
Bedroom Ergonomics: Walking Clearance Around Beds & Wardrobes
Calculate walking corridors around beds, dresser drawer clearances (36″), and closet door swings to create an accessible, stress-free bedroom layout.
rugs
Bedroom Rug Placement: Sizing Under Queen & King Beds
Master bedroom rug sizing. Compare under-nightstand layouts vs the lower two-thirds rule for Queen and King beds, with bedside step-off clearance standards.
curtains
The Definitive Guide to Curtain Fullness & Fabric Calculation
Master the mathematics of drapery fullness. Learn how to calculate 1.5x, 2.0x, and 2.5x fullness, bolt yardage requirements, and seam allowances for custom curtains.
curtains
Puddle vs. Floating Curtains: Drapery Length Guide & Hem Allowances
Compare sill, apron, floating, trouser break, and puddled curtain lengths. Learn how to calculate floor clearances, hem allowances, and choose the right style.
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Deterministic Calculations
Every formula is derived from architectural drafting standards (ADA Title III, NKBA, SMPTE 4K, museum curatorial guidelines) with complete mathematical transparency.
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Your room dimensions and uploaded floorplans stay strictly on your local device. We never transmit your floor dimensions to external databases or generative AI models.
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We never fabricate user testimonials, synthetic reviews, or fake testing. All hypothetical examples are clearly identified to maintain strict publisher standards.