# Measure walls without simply using a formula

Instructions and assistance for measuring the walls often include mathematical or geometric formulas. However, to calculate the surface measures for which paint, wallpaper or other decorative material needs to be provided, one single formula is sufficient. All further steps are solved by subtracting or adding.

### The basic formula is called width times length

Of course, it is possible to pack the walls into mathematical or geometric formulas. But since not everyone who wants to create a wall, the numbers works is inclined, the measuring and calculating can be done with common sense and almost no formula. In principle, only one basic rule has to be heeded.

Rectangular surface dimensions result from the multiplication of the two side lengths.

All other measuring and invoicing steps only require the ability to deduct or count numbers. When working in the units of measure and scale of centimeters, the digits also fall off after the comma.

#### 1. Measure the base area

Almost all walls have a rectangular shape. The width multiplied by the length gives the base area. If only in centimeters is calculated, decimal places are usually omitted, if no pronounced precision work is required.

#### 2. Surfaces of projection or indentation

A protruding from the wall projection such as a fireplace or a recess consists of two rectangular additional surfaces on the sides. They are again measured in width times height and added to the base area.

#### 3. Window and door reveals

The side soffits are three rectangular areas that are measured and added individually. The lower and thus fourth surface is usually omitted because a window sill covers it.

#### 4. Recesses such as passageways, windows and doors

Passageways, windows and doors are subtracted from the base area after measuring.

Measuring instruments are tape measure, light beam measuring device (infrared or laser) and folding rule.

### Tolerance for material costing

For all wall work such as priming, painting or wallpapering, it is necessary to calculate the actual wall to be covered. In material costing, about twenty percent overhang should be added to the result.

### Tips & Tricks

For oblique courses, for example on the ceiling, measure the lengths on both sides of the wall. The difference results in an imaginary rectangle, the dimension of which you cut in half and add to the base area, which arises on the lower length side.

Artikelbild: Lordn / Shutterstock