Compute bar mass and weight using practical clear options. Choose units, shapes, materials, and gravity. Export clean CSV and PDF reports instantly for records.
| Shape | Dimensions | Material | Length | Mass (kg) | Weight (N) |
|---|---|---|---|---|---|
| Round (Solid) | Diameter 50 mm | Steel | 1.0 m | 15.413 | 151.170 |
| Rectangular | 50 mm × 20 mm | Aluminum | 1.0 m | 2.700 | 26.478 |
| Round (Hollow) | OD 60 mm, ID 40 mm | Stainless Steel | 1.0 m | 17.593 | 172.569 |
The calculator follows the standard mass and weight relationship:
Bar weight affects inertia, support reactions, and handling loads. A 1.0 m solid steel bar of 50 mm diameter is about 15.41 kg, producing roughly 151 N on Earth. Accurate mass values improve lab rigs, fixtures, and transport planning.
Mass depends on material density and volume. Weight force depends on gravity. The calculator reports both, so you can separate material choice from environment. On the Moon, using g ≈ 1.62 m/s², the same mass produces about 16.5% of Earth’s weight force. This distinction matters for simulations and lifting hardware.
Area is computed from geometry for round, hollow, rectangular, square, or hexagon sections. Area errors scale directly into volume and mass. For hollow bars, inner diameter must remain smaller than outer diameter to avoid nonphysical results.
Representative densities are used: steel ≈ 7850 kg/m³, aluminum ≈ 2700 kg/m³, copper ≈ 8960 kg/m³, and titanium ≈ 4500 kg/m³. Real alloys vary by composition and heat treatment, so use custom density when you have a certified material datasheet.
Dimensions can be entered in mm, cm, m, in, or ft, while density accepts kg/m³, g/cm³, or lb/ft³. Keep all dimensions in one unit system per run. If you measure diameter with calipers, mm inputs reduce rounding and transcription mistakes. After conversion, the calculator works internally in meters to keep formulas consistent.
For constant cross‑section, mass scales linearly with length. A 2% cut length deviation produces a 2% mass deviation. When ordering stock, combine length tolerance with density uncertainty to estimate worst‑case weight for lifting plans.
CSV exports are convenient for spreadsheets, batch comparisons, and material logs. PDF exports create a stable, shareable report for site folders or lab notebooks. Both exports reuse the same inputs that generated the on‑screen results. Saving exports alongside drawings improves traceability during reviews and audits.
Use mass for dynamic calculations like momentum and natural frequency. Use weight force for supports, anchors, and handling equipment ratings. If your project has strict limits, run multiple materials and shapes to quickly identify lighter alternatives. Comparing mass per length is a fast way to spot efficiency gains before detailed modeling.
Mass is the amount of matter, reported in kilograms or pounds. Weight is the force due to gravity, reported in newtons or lbf. Weight changes with gravity; mass does not.
If you lack a datasheet, 7850 kg/m³ is a common reference for carbon steel. Stainless grades can be slightly higher. For best accuracy, enter the certified density for your specific alloy.
Yes. Choose in or ft as the dimension unit, then enter length and section sizes in the same unit. The calculator converts internally to meters to keep geometry and volume calculations consistent.
The cross‑section area is the outer circle minus the inner circle. Enter outer and inner diameters, ensuring the inner diameter is smaller. The remaining steps are volume, mass, then weight.
Catalogs may assume nominal sizes, include coatings, or use grade‑specific densities. Manufacturing tolerances and moisture or surface treatments can also shift mass. Use measured dimensions and custom density when needed.
Set the length to 1 meter or 1 foot and calculate. The mass and weight results then represent per‑unit values. This is helpful for quick comparisons across materials and cross‑sections.
Yes. Enter the local gravitational acceleration in m/s². For example, Moon ≈ 1.62 and Mars ≈ 3.71. The calculator will keep mass the same and scale the weight force accordingly.
Accurate bar weight estimates help safer designs every day.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.