# Material weights

Weight underpins everything quoted or hauled by the tonne — structural steel, rebar, sand and gravel, glass and stone. Get it wrong and the transport and lifting plan are wrong with it: a truck rated at 30 t loaded to 34 t is an overweight vehicle on the first weighbridge.

Everything here uses theoretical weight: steel at 7850 kg/m³, stainless at 7930, aluminium 2700, glass 2500, granite 2800, marble 2700 and timber 400-800 by species. Actual weighed material differs by 1-5%, heavier when the mill rolls to positive tolerance, so purchasing and freight need a margin while settlement uses theoretical weight.

- Category page: https://jianzhujisuan.com/en/c/material-weight
- Data checked: 2026-10-25

## Tools in this group

- [Steel Pipe Weight Calculator](https://jianzhujisuan.com/en/steel-pipe-weight): Mass per metre, per length and in total from OD and wall thickness.
- [Steel Plate Weight Calculator](https://jianzhujisuan.com/en/steel-plate-weight): Mass per square metre, per plate and in total from size and thickness.
- [Round, Square and Flat Bar Weight Calculator](https://jianzhujisuan.com/en/steel-bar-weight): Mass per metre and total for round, square and flat bar.
- [Equal Angle Weight Calculator](https://jianzhujisuan.com/en/steel-angle-weight): Mass per metre and total for equal angle steel.
- [Stainless Steel Tube Weight Calculator](https://jianzhujisuan.com/en/stainless-weight): Mass per metre and total for stainless tube.
- [Aluminium Plate Weight Calculator](https://jianzhujisuan.com/en/aluminum-weight): Mass per square metre, per plate and in total for aluminium.
- [Glass Weight Calculator](https://jianzhujisuan.com/en/glass-weight): Mass per square metre, per pane and in total for glass.
- [Stone Weight Calculator](https://jianzhujisuan.com/en/stone-weight): Mass per square metre and total for stone slabs by density.
- [Timber Volume and Weight Calculator](https://jianzhujisuan.com/en/timber-volume): Volume, board area and weight for timber by species density.
- [Sand and Gravel Tonnage Converter](https://jianzhujisuan.com/en/sand-ton): Cubic metres to tonnes by bulk density, with truck loads.
- [Soil Haulage Calculator](https://jianzhujisuan.com/en/soil-ton): Natural to loose volume, tonnes and truck loads without overloading.
- [Cement Bag Calculator](https://jianzhujisuan.com/en/cement-bag): Total cement, exact bags and whole bags to order.
- [Section Steel Weight Calculator](https://jianzhujisuan.com/en/section-steel-weight): Pick a section type, enter height, flange width and thickness to get weight per metre, per piece and total tonnage.
- [Weld Consumable Calculator](https://jianzhujisuan.com/en/weld-material): Weld area, deposited metal and the electrode you actually need to buy.

## Questions

### How is steel pipe weight calculated?

Weight in kg/m = (outside diameter − wall thickness) × wall thickness × 0.02466, with both dimensions in millimetres. A 108 × 4 pipe works out at (108 − 4) × 4 × 0.02466 = 10.26 kg/m. That factor is for carbon steel; use 0.02491 for stainless.

### How much does a square metre of steel plate weigh?

Thickness in millimetres × 7.85 kg. A 10 mm plate is 78.5 kg/m². Chequered plate adds about 2.5 kg/m². Plate is rolled to a negative tolerance but settlement uses nominal thickness times theoretical density.

### How many tonnes in a cubic metre of aggregate?

It depends on bulk density and moisture: about 1.45-1.65 t/m³ for medium sand, 1.45-1.55 for crushed stone and 1.6-1.8 for graded base. Each 1% of moisture adds roughly 1% to the weight. Haulage is weighed, settlement is by compacted or loose volume — keep the two bases consistent.