Free tool

Sheet metal weight calculator

Type the size, the thickness and the material. You get the weight of one piece and of the whole quantity, and the material cost at your price per kg.

SizeWidth (mm)Length (mm)MaterialThickness (mm)QuantityMaterial price (€/kg)

Weight per piece: 73.6 kg
Total weight: 73.6 kg
Material cost: €88.31
Area per piece: 3.125 m²
Density: 7,850 kg/m³

How it is worked out

Weight = width × length × thickness × density. In shop units: kg = area in m² × thickness in mm × density ÷ 1000.Mild steel at 7850 kg/m³ weighs 7.85 kg per square metre for every millimetre of thickness, so a 1250 × 2500 mm sheet of 3 mm weighs 73.6 kg.Material cost = weight × your price per kg. A quote usually adds a markup for handling and offcuts; this calculator shows the bare cost.

Nominal densities in kg/m³: Mild steel 7,850, Stainless steel 304 7,900, Aluminium 2,700, Galvanised steel 7,850, Brass 8,500, Copper 8,940. Alloys differ by a few percent; for an exact figure use the density on the mill certificate.

Weight per square metre (kg/m²)

Thickness (mm)	Mild steel	Stainless steel 304	Aluminium	Galvanised steel	Brass	Copper
0.5	3.93	3.95	1.35	3.93	4.25	4.47
1	7.85	7.90	2.70	7.85	8.50	8.94
1.5	11.78	11.85	4.05	11.78	12.75	13.41
2	15.70	15.80	5.40	15.70	17.00	17.88
3	23.55	23.70	8.10	23.55	25.50	26.82
4	31.40	31.60	10.80	31.40	34.00	35.76
5	39.25	39.50	13.50	39.25	42.50	44.70
6	47.10	47.40	16.20	47.10	51.00	53.64
8	62.80	63.20	21.60	62.80	68.00	71.52
10	78.50	79.00	27.00	78.50	85.00	89.40
12	94.20	94.80	32.40	94.20	102.00	107.28
15	117.75	118.50	40.50	117.75	127.50	134.10
20	157.00	158.00	54.00	157.00	170.00	178.80
25	196.25	197.50	67.50	196.25	212.50	223.50