Material Weight Calculator (Steel, Aluminium, Plastics, Wood…) Community
Questions, answers and tips from people who use the Material Weight Calculator (Steel, Aluminium, Plastics, Wood…). Weight from dimensions and density for plates, bars, tubes, pipes and more.
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This page shows only real posts from real people, so it starts empty. The guide below has the questions people most often have about the Material Weight Calculator (Steel, Aluminium, Plastics, Wood…). Pick one to start a thread, or write your own.
From the tool guide: common questions about Material Weight Calculator (Steel, Aluminium, Plastics, Wood…)
The items below are not posts by community members. They come from the written guide for this tool and are here to get a conversation started. Use “Ask a follow-up” to open a thread about any of them.
How is weight calculated?
Volume × density, with volume from standard formulas for each shape.
From the tool guide Ask a follow-upAre the densities exact?
They are typical values; alloys vary by a few percent.
From the tool guide Ask a follow-upCan I use pounds and inches?
Yes — pick inches or feet as the dimension unit; the answer is given in kg and lb.
From the tool guide Ask a follow-upWhat this tool does
Choose a shape — plate, round bar, square bar, flat bar, round tube, rectangular tube, hex bar, sphere, hollow cylinder or a known volume — enter the dimensions in mm, cm, m, inches or feet, pick one of 40 materials (carbon and stainless steel, tool steel, cast iron, several aluminium alloys, copper, brass, bronze, titanium, zinc, lead, nickel, magnesium, precious metals, concrete, glass, woods, common plastics and 3D-printing filaments) or type a custom density, and the calculator returns the weight per piece and for the whole quantity in kg and lb, plus the volume.
How to use it, step by step
- Select the shape and unit.
- Pick the material or enter a custom density.
- Enter the dimensions and quantity.
- Read the weight, volume and cost.
Tips from the guide
- For standard sections use mill-sheet weights when exact.
- Densities vary by alloy and temper — use a custom density for exact values.
- Add 5–10% for offcuts when buying stock.
- Convert dimensions to the chosen unit before entering them.
Common mistakes to avoid
- Mixing units between dimensions.
- Using steel density for stainless in precise work (about 2% different).
- Forgetting hollow sections have an inner dimension.
Who uses it
- Fabricators and machinists. Quote stock weight and cost.
- Engineering students. Check mass in design projects.
- Makers. Estimate shipping and print weights.
How to ask a question people can answer
A good thread on the Material Weight Calculator (Steel, Aluminium, Plastics, Wood…) saves everyone time. Start with a title that names the exact problem, such as the input you used, the result you expected and the result you got. A title like “Not working” is hard to answer, while a title with the specifics gets replies quickly.
- Say what you tried. List the steps you followed and any settings you changed, so replies do not repeat what you already did.
- Share a small example. A short sample input and the output you saw is worth more than a long description. Remove anything private first.
- Mention your setup. Your device, browser and whether you are on a phone or a computer can explain many odd results.
- One question per thread. Separate topics get clearer answers and are easier to find later with the search box above.
- Come back and reply. If a suggestion worked, say so and upvote it, and if you found the fix yourself, post it for the next person.
Community rules
Be kind, stay on topic and keep personal data out of your posts. Do not post adult, hateful or illegal content, advertising or repeated links. Every post is shown with its author’s username and date, and posts that break these rules can be hidden by moderators. This space is for help with the Material Weight Calculator (Steel, Aluminium, Plastics, Wood…) and related tasks, and it is separate from the sitewide discussion forum where broader topics live.