Material weights calculators
14 material weight calculators: steel pipe, stainless pipe, plate, round and flat bar, equal angle, sections, aluminium, glass, stone, timber volume, aggregate tonnage and haulage.
▩Stone Weight CalculatorMass per square metre and total for stone slabs by density.◎Steel Pipe Weight CalculatorMass per metre, per length and in total from OD and wall thickness.▬Steel Plate Weight CalculatorMass per square metre, per plate and in total from size and thickness.▮Round, Square and Flat Bar Weight CalculatorMass per metre and total for round, square and flat bar.∟Equal Angle Weight CalculatorMass per metre and total for equal angle steel.◍Stainless Steel Tube Weight CalculatorMass per metre and total for stainless tube.▤Aluminium Plate Weight CalculatorMass per square metre, per plate and in total for aluminium.▢Glass Weight CalculatorMass per square metre, per pane and in total for glass.▥Timber Volume and Weight CalculatorVolume, board area and weight for timber by species density.▦Sand and Gravel Tonnage ConverterCubic metres to tonnes by bulk density, with truck loads.▨Soil Haulage CalculatorNatural to loose volume, tonnes and truck loads without overloading.▣Cement Bag CalculatorTotal cement, exact bags and whole bags to order.⌷Section Steel Weight CalculatorPick a section type, enter height, flange width and thickness to get weight per metre, per piece and total tonnage.⌇Weld Consumable CalculatorWeld area, deposited metal and the electrode you actually need to buy.
What this group solves
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.
Almost nothing here is calculated — it is tables and conversion, yet it underpins pricing, lifting and structural load: steel by theoretical mass, stone by bulk density, glass at 2.5 kg per square metre per millimetre of thickness. Get a density wrong by a factor and both the quotation and the lifting sling selection are wrong. The only rule: confirm the material and its density convention, multiply by volume, then sanity-check the order of magnitude.
Which one for your case
| Mass per metre of steel tube, round or square | Steel Pipe Weight Calculator |
| Mass per square metre of steel plate | Steel Plate Weight Calculator |
| Section properties of H-beams, I-beams and channels | Section Steel Weight Calculator |
| Mass per metre of angle | Equal Angle Weight Calculator |
| Stainless plate or tube | Stainless Steel Tube Weight Calculator |
| Aluminium sheet or extrusion | Aluminium Plate Weight Calculator |
| Glass mass for facade and rooflight loading | Glass Weight Calculator |
| Stone mass for bracket selection | Stone Weight Calculator |
| Timber volume — cubic metres and board feet | Timber Volume and Weight Calculator |
| Sand and soil between cubic metres and tonnes | Sand and Gravel Tonnage Converter |
| Bags of cement needed | Cement Bag Calculator |
Where this group goes wrong
- Taking steel density as 7.85 and multiplying by volume directly. 7.85 is g/cm³; in kg/m³ it is 7850. Skip that step and a steel column weighs one thousandth of the truth.
- Computing glass as total thickness × 2.5 kg/m². Insulating units are the sum of the two panes, not the sum of the thicknesses: 6+12A+6 is 15+15 = 30 kg/m², while treating 24 mm as solid gives 60 kg/m² — double.
- Using a flat 'one cubic metre equals 1.5 tonnes' for sand and soil. Medium sand bulks 1450-1600 kg/m³, gravel 1450-1550, clay 1800-2000, and each 1% of moisture adds 10-15 kg/m³.
- Applying 2.7 t/m³ to every stone. Granite 2.6-2.8, marble 2.5-2.7, sandstone as low as 2.2-2.4 — pricing sandstone as granite overstates it by 20% and directly affects bracket and cast-in anchor selection.
FAQ
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.
Why use theoretical mass rather than weighbridge figures?
Schedules, settlement and lifting loads all use theoretical mass because it is reproducible. Sections are permitted about ±5% per piece and plate is supplied on negative thickness tolerance, so delivered mass typically differs by 3-5%. Tender and settlement must use the same basis or the two will not reconcile.
How many tonnes in a cubic metre of sand?
Medium sand bulks at 1450-1600 kg/m³, so about 1.45-1.6 t; coarse runs heavier and fine lighter. At 5% moisture add 50-80 kg/m³. Note bulk density is not apparent density — apparent density is around 2600, but loose heaps contain voids, so use bulk density.
How is glass weight calculated?
About 2.5 kg per square metre per millimetre. 6 mm monolithic is 15 kg/m²; 6+12A+6 insulating is 30 kg/m² (sum of the panes); 6+1.14PVB+6 laminated is about 30.3 kg/m²; 8+12A+8 is 40 kg/m². Facades and rooflights must be designed on these figures, not habit.
How much does a cubic metre of timber weigh?
Depends on species and moisture: softwood air-dry 500-550 kg/m³, hardwood 700-900, and green timber up to 900-1100. Log volume follows the GB/T 4814 tables, which allow for taper — not a simple πr²h. Sawn timber is measured length × width × thickness, with board feet used for pricing (1 board foot = 1/12 cubic foot).
Related data tables
Material density tableCheck this before converting volume to weight — bulk and solid density differ by a factor of two, and picking the wrong one ruins the tonnage.Pipe size chart (DN to inch)DN15 to DN300: the inch equivalent, outside diameter, common wall, weight per metre and external area for insulation take-off.
Other groups
Results are estimating aids only and are not a design basis. Construction and final accounts must follow the drawings, the applicable standards and an approved method statement. Anything affecting structural safety, shoring or falsework must be checked by a suitably qualified engineer.