TrimTally / Wall project planner: paint, wallpaper and battens

Wall project planner: paint, wallpaper and battens

Measure multiple walls and openings once, then get paint quantities, wallpaper drop estimates and decorative batten positions in one printable plan.

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1. Walls and openings

DimensionsWalls · width, heightOne wall per line. Up to 12 walls. Use the selected unit.Openings · wall number, left, bottom, width, heightDistances start at the left and floor. Enter 0 for no openings. Overlaps and openings outside a wall are rejected.

2. Paint

Paint coatsProduct coverage · sq ft per US gallonRead your paint label. This editable example is not a product claim.Paint allowance · %Can size · US gallons

3. Wallpaper

Wallpaper roll width · selected unitRoll length · selected unitTop + bottom trimming total · selected unitPattern matchVertical pattern repeat · selected unitExtra full rolls

4. Decorative battens

Actual batten width · selected unitPreferred clear gap · selected unitVertical batten height · selected unitExtra vertical trim length · %

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Example output · Generate your plan to use your current inputs.

Your room, measured once.

156 sq ft

paintable area after openings

Wall 1 · 120 × 96 in

Wall 2 · 144 × 96 in

Paint shopping list

Measurement	Amount
Net wall area	156 sq ft
Coats / entered coverage	2 / 350 sq ft per US gal
Paint including 10% allowance	0.98 US gal
Buy full cans	1 × 1 US gal

Decorative vertical battens

Quantity	Amount
Batten pieces	14 × 48 in
Combined length	56 linear ft
Length with 10% extra	61.6 linear ft

Wall / clear run	Battens	Clear gap	Left edges from wall start · in
1 / 0–42 in	3	18 in	0, 20, 40
1 / 78–120 in	3	18 in	78, 98, 118
2 / 0–144 in	8	18.29 in	0, 20.29, 40.57, 60.86, 81.14, 101.43, 121.71, 142

Openings below the batten top divide the wall into clear full-height runs; this plan does not place shortened battens beneath windows. Each run has flush edge battens. Rails, opening surrounds, stock lengths, kerfs and installation details need a separate check. Linear feet is not a stock-board count.

Wallpaper cutting estimate

Wall	Full-height strips	Conservative cut length
1	6	105 in
2	8	105 in

Quantity	Result
Rolls used by cutting plan	5
Spare rolls	1
Buy rolls	6

Openings are not deducted from wallpaper. Full-height strips, longest cuts first; offcuts are not optimized into short pieces. Half-drop allows an extra half-repeat per strip. Confirm pattern alignment, batch numbers and roll dimensions with the supplier.

Measure once, use the same geometry

Enter each rectangular wall as width, height. Give openings their wall number and coordinates from the left edge and floor. The tool checks that rectangles fit and do not overlap before subtracting their areas for paint. Mixed units are not supported within one plan; the unit selector converts the dimensional fields together.

Two walls, one worked example

A 120 × 96-inch wall and a 144 × 96-inch wall total 176 square feet. A 36 × 80-inch door removes 20 square feet, leaving 156. Two coats at an entered coverage of 350 square feet per US gallon use 0.89 gallon before allowance. With 10% extra, the estimate is 0.98 gallon, rounded to one 1-gallon can.

What measurements cannot decide

Coverage changes with surface, application and product. This planner does not assess substrate condition, concealed utilities or structural safety. Check important dimensions on site and follow the product manufacturer’s instructions. Ceilings and opening reveals are not included.

Openings become clear decorative runs

Any opening that starts below the batten top divides that wall into clear horizontal sections. Each section gets two flush edge battens plus a count chosen near the preferred gap. Positions refer to left edges from the original wall start. This version deliberately leaves the entire opening width free; it does not design short battens below windows.

A shopping estimate with visible limits

Paint subtracts measured openings. Wallpaper keeps full-height strips and does not subtract openings. Vertical batten length includes the selected allowance but is not a stock-board purchase count. Rails, mitres, kerf, casing, uneven walls and installation design remain separate. The sheet helps you compare quantities before discussing the final material order.

Straight and half-drop assumptions

For straight match, wall height plus total trimming is rounded up to a whole repeat. Half-drop adds another half-repeat to every such strip. This deliberately generous method allows alignment but may overbuy compared with a skilled alternating-drop plan. Free match uses height plus trimming with no repeat adjustment. Confirm the hanging sequence with your supplier.

A worked roll estimate

A 120 × 96-inch wall needs six 20.5-inch-wide strips. With 4 inches total trimming and a 21-inch straight repeat, each cut is 105 inches. A 396-inch roll fits three such cuts, so two rolls cover the wall before an optional spare. A half-drop allowance raises each cut to 115.5 inches in this model.

Questions, answered

Can I use this to plan load-bearing work?

No. These are decorative dimensions and material estimates only.

Why are paint and wallpaper areas different?

Paint can usually be omitted from openings; wallpaper pattern matching may still require full strips around them.