Measure the wall. See the area.

Separate the whole rectangle from the opening you will leave out.

WORKSHOP NOTE / MEASURE FIRST

SEE THE WALL.
COUNT THE SURFACE.

A scale sketch from the measurements you enter. Start with one wall, then subtract one rectangular opening.

01
AREA
SKETCH

FRONT VIEW · ENTERED DIMENSIONSONE WALL / ONE OPENING

Whole wall10 m²

Opening1.2 m²

Remaining surface8.8 m²

One flat wall and at most one rectangular opening. Recesses, slopes, trim, surface preparation and coating choice are separate. Dimensions stay in this browser; nothing is saved.

USE THESE DIMENSIONS IN THE PAINT PLANNER ↗

Next, add the selected paint’s coverage, coat count and container size. The handoff carries measurements only.

Equipment to consider

Choose for the way you use it.

As an Amazon Associate I earn from qualifying purchases. These are researched product options, not hands-on test results. Check the exact model, current price and availability on Amazon.

Model matched · suitability first

Stanley PowerLock 25-foot tape measure

A retractable tape for room and furniture measurements. This listing uses imperial measurements; choose a metric alternative if that suits your plans.

View on Amazon ↗

Model matched · suitability first

Bosch GLL50-20 cross-line laser

An alignment aid for shelves and wall layouts. Check the mounting arrangement and working range; it does not detect hidden pipes or wires.

View on Amazon ↗

Compare before you choose

Match the task and setup before considering price. These notes are editorial research, not performance scores.

Product option	Fit and limits to check
Stanley PowerLock 25-foot tape measure	A retractable tape for room and furniture measurements. This listing uses imperial measurements; choose a metric alternative if that suits your plans.
Bosch GLL50-20 cross-line laser	An alignment aid for shelves and wall layouts. Check the mounting arrangement and working range; it does not detect hidden pipes or wires.