DecoMoldings

inspiration · Arched

Bathroom Arched Wall Molding

Bathroom Arched Wall Molding: wall elevation, bathroom layout for 5, 7, 9 ft walls, cut list, calculator and pre-cut kits.

Catalog snapshot View 2 sources ↓

Project calculator

Wall molding linear-foot estimate

Estimate for rectangular molding frames.

Estimated quantity52.43 linear feet

Divide by 7.87 ft (240 cm stick) and round up for the number of sticks.

Formula & assumptionsframe_count * 2 * (frame_width_inches + frame_height_inches) / 12 * (1 + waste_percent / 100)

Assumes identical rectangular frames. The waste allowance is editable. The estimate does not optimize cuts or include separate rails, baseboards, or other trim.

Overview

Upper frames finish in a half-round arch instead of a flat top. The curve softens a headboard or reading-nook wall. Soft curves behind beds, in nurseries and entryways.

Arched layout on a 7 ft bathroom wall

Molding over the full wall height, upper and lower rows divided by a chair rail. On a 7 ft wall with an 8 ft ceiling this gives 2 frames per row, each 36 in wide, with 50 in upper and 21 in lower frames. The layout uses about 17.47 m of 2.5 cm molding, or 8 sticks of 240 cm, including 10% waste. Use moisture-resistant polystyrene outside the shower spray zone and a bathroom-rated paint.

Building the arched pattern

Arched tops are pre-formed in MDF; the straight sides and the bottom rail are cut to the same width as the arch. Fix the arch first, then hang the sides from it.

Wall elevation

White wall, tone-on-tone trim, arched layout on a 7 ft wall. Colors are screen approximations.

Bathroom wall sizes: arched accent wall layout

Wall widthFrames per rowFrame widthFrame height (upper / lower)Molding incl. 10% waste240 cm sticksChair rail pieces (300 cm)
5 ft152 in50 / 21 in10.83 m51
7 ft236 in50 / 21 in17.47 m81
9 ft330.7 in50 / 21 in24.1 m111

Cut list for a 7 ft wall

Planning cut list
PieceQuantityLength
Frame top and bottom (lower row)436 in
Frame sides (lower row)421 in
Arch frame sides (upper row)432 in
Arch top + bottom rail (upper row)236 in span
Chair rail1300 cm lengths

Pre-cut kits for this wall

Pre-cut kits that fit this project. Open a kit for photos, options and pricing.

Arch Molding Kit, 3 Widths | Flexible Pre-Cut MDF Arch Trim for Accent Walls01 / KIT

Arch Molding Kit, 3 Widths | Flexible Pre-Cut MDF Arch Trim for Accent Walls

From $58.40

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Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation02 / KIT

Half Wall Arched Wainscoting Panels Kit | Pre-Cut MDF Easy Installation

From $73.60

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Double Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels03 / KIT

Double Arched Wall Molding Set | Pre-Cut MDF Decorative Wall Panels

From $133.60

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U Shaped Arch Wall Trim Molding Kit | Pre-Cut MDF Medium & Large04 / KIT

U Shaped Arch Wall Trim Molding Kit | Pre-Cut MDF Medium & Large

From $81.40

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Flexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels05 / KIT

Flexible Arch Trim Wall Molding Kit | Pre-Cut MDF Decorative Wall Panels

From $83.40

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Arched Accent Wall Trim Molding Kit, 3 Widths | Pre-Cut MDF06 / KIT

Arched Accent Wall Trim Molding Kit, 3 Widths | Pre-Cut MDF

From $58.40

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Questions

How much molding do I need for a 7 ft bathroom wall with arched frames?

About 17.47 m (57 linear ft) including a chair rail and 10% waste, which is 8 sticks of 240 cm. That assumes 2 frames per row, 36 in wide, on an 8 ft ceiling.

How high should the chair rail be in a bathroom?

About one third of the ceiling height: 32 in on an 8 ft ceiling, 36 in on 9 ft and 40 in on 10 ft. Use moisture-resistant polystyrene outside the shower spray zone and a bathroom-rated paint.

Trace the details

Sources & dates

Prices, options and photos come from our product catalog on the date shown. Layout tables are planning estimates; measure your wall before ordering.

  1. Paint color dataset (screen approximations; LRV calculated)Recorded November 11, 2026
  2. DecoMoldings product catalogRecorded November 11, 2026