Metal Density Calculator
Calculate density from measured mass and volume, or solve for mass or volume using a known density. Record the material condition, temperature, measurement method, and units so the result can be interpreted correctly.
Formula
Mass density is mass divided by volume: ρ = m / V.
Mass from density and volume: m = ρ × V.
Volume from mass and density: V = m / ρ.
The coherent SI unit for mass density is kg/m³; conversions must apply to both the mass and cubed-length unit.
Common examples
Load a calculated example, then adjust its dimensions or quantity.
| Example | Inputs | Calculated answer | Load example |
|---|---|---|---|
| Incoming material checkDensity from a machined metric couponMeasured coupon mass divided by geometric volume gives a screening density that should be compared only with an appropriate sourced range. | Calculation mode: Density from mass and volume; Mass: 0.6124 kg; Volume: 78 cm³ | Calculated mass density7,851.282051 kg/m³ | |
| Irregular sample screeningDensity from mass and displaced volumeA documented displacement method should address trapped air, liquid temperature, wetting, and instrument resolution before interpreting the measurement. | Calculation mode: Density from mass and volume; Mass: 0.4455 kg; Volume: 50 cm³ | Calculated mass density8,910 kg/m³ | |
| US machine-shop checkDensity from lb and in³ measurementsConversion should retain full working precision so rounded pounds and cubic inches are not compared as exact measurements. | Calculation mode: Density from mass and volume; Mass: 2.83 lb; Volume: 10 in³ | Calculated mass density7,833.413033 kg/m³ | |
| Machined blank estimateMass from aluminum-alloy density and volumeAlloy-specific nominal density gives a better blank estimate than treating every aluminum grade as the same material. | Calculation mode: Mass from density and volume; Volume: 1250 cm³; Material density preset: Documented custom density; Documented custom density: 2700 kg/m³ | Calculated mass3.375 kg | |
| Quote screeningMass from stainless density and volumeBefore multiplying density by modeled volume, confirm the stainless grade, density source, temperature basis, and unit system. | Calculation mode: Mass from density and volume; Volume: 250 in³; Material density preset: Documented custom density; Documented custom density: 0.289 lb/in³ | Calculated mass32.772049 kg | |
| Inventory reconciliationVolume from steel mass and densityEquivalent solid volume is useful for screening inventory differences, but it does not prove shape, grade, internal voids, or usable yield. | Calculation mode: Volume from mass and density; Mass: 785 kg; Material density preset: Documented custom density; Documented custom density: 7850 kg/m³ | Calculated volume0.1 m³ | |
| Busbar stock checkVolume from copper mass and densityCoating and alloy identity should remain outside a copper-volume inference unless their contribution is documented and measured. | Calculation mode: Volume from mass and density; Mass: 50 lb; Material density preset: Documented custom density; Documented custom density: 0.323 lb/in³ | Calculated volume0.002537 m³ | |
| Laboratory screeningSmall-part density from grams and cm³Small samples need adequate mass and volume resolution; otherwise the displayed digits can imply more certainty than the instruments provide. | Calculation mode: Density from mass and volume; Mass: 0.0426 kg; Volume: 5.4 cm³ | Calculated mass density7,888.888889 kg/m³ | |
| Production planningMass from brass density and modeled volumeModeled brass mass should use a grade-specific density and preserve the assumptions made for holes, machining stock, and net volume. | Calculation mode: Mass from density and volume; Volume: 320 cm³; Material density preset: Documented custom density; Documented custom density: 8499.999999999998 kg/m³ | Calculated mass2.72 kg | |
| High-value stock reconciliationVolume from titanium mass and densityDiscrepancies can guide an inventory investigation, followed by identity and quantity checks through approved records, measurement, or testing. | Calculation mode: Volume from mass and density; Mass: 18 lb; Material density preset: Documented custom density; Documented custom density: 0.163 lb/in³ | Calculated volume0.00181 m³ |
Frequently asked questions
What is mass density?
Mass density is mass divided by volume. NIST uses the symbol ρ and the coherent SI unit kg/m³.
Can density identify an unknown metal?
Density can narrow possibilities, but different alloys can overlap and measurement error can be significant. Identification may require chemistry, documentation, or approved testing.
Why does temperature matter?
Temperature changes volume and can also affect measurement conditions. Use density data and measured dimensions at a stated or compatible temperature when precision matters.
Should I use nominal or measured density for weight calculations?
Use a source-backed nominal alloy density for a repeatable theoretical estimate. Use measured density only when the sample, method, and intended application justify it.
Sources
NIST Guide to the SI, Chapter 8, Section 8.6.7 Mass density (Opens in a new tab)
National Institute of Standards and Technology
- Supports
- Geometry or calculation formula
- Checked
NIST Guide to the SI, Appendix B.8 and footnotes (Opens in a new tab)
National Institute of Standards and Technology
- Supports
- Unit conversion
- Checked
The International System of Units (SI Brochure), 9th edition (Opens in a new tab)
Bureau International des Poids et Mesures
- Supports
- Geometry or calculation formula
- Checked