Welded Mesh Calculator

What this tool does

Mesh sheets have to overlap, and the overlap is not free: a 6 by 2.4 sheet with a 300 mm lap covers only 11.97 square metres, not 14.4. The mass comes from the bars themselves — diameter and spacing, in both directions, at the density of steel — so the page works for any mesh, not only the ones with a standard code name.

Formula

kg/m² = 2 × 7850 × π d² ÷ (4000 × spacing) · usable sheet = (L − lap)(W − lap) · sheets = ⌈area ÷ usable sheet⌉

Variables

Symbol	Meaning	Unit
`ar`	Area to cover	m²
`pl`	Panel length	m
`pw`	Panel width	m
`lap`	Lap between sheets	m
`d`	Bar diameter	mm
`sp`	Spacing between bars	mm
`NP`	Panels to buy	—
`EA`	Area one sheet really covers	m²
`GA`	Area of one sheet as sold	m²
`KM`	Mass per square metre	kg/m²
`TM`	Total mesh mass	kg
`LO`	Area lost to the laps	m²
`BM`	Mass of one metre of bar	kg/m
`BL`	Bar length in one square metre	m/m²

Worked example

Area to cover100 m²
Panel length6 m
Panel width2.4 m
Lap between sheets0.3 m
Bar diameter6 mm
Spacing between bars150 mm

Panels to buy9
Area one sheet really covers11.9700 m²
Area of one sheet as sold14.4000 m²
Mass per square metre2.9594 kg/m²
Total mesh mass383.54 kg
Area lost to the laps29.600 m²
Mass of one metre of bar0.22195 kg/m
Bar length in one square metre13.3333 m/m²

Limitations

The result is an estimate based only on the values you type. Real situations often include factors this calculator does not know about.
The calculation runs at full precision and only the display is rounded. If you copy an intermediate value and retype it, small differences can appear.
Mixing units is the most common source of error. Convert every input to the units shown next to each field before calculating.