Engineering · Reference + tools

Material density — data & comparator.

Density for 75 engineering materials in g/cc, kg/m³, lb/in³ and lb/ft³ — plus a substitution comparator to see the weight delta of swapping one alloy for another on the same part, a unit converter, and a searchable, sortable table. Built for quick part-weight estimates, shipping mass, dead-load work, and lightweighting decisions.

Materials

Lightest

Nylon 6/6

1.14 g/cc

Heaviest

Tungsten (W)

19.25 g/cc

Range

17×

Interactive

Density tools.

Compare two materials for a substitution, or convert a density value between units. For full part-and-stock weight from geometry, use the material weight calculator.

Substitution comparator

Same part, different material — how much does the weight change?

From (material A)To (material B)

Part weight in A

Unit converter

Convert a density value across all four units.

ValueUnit

g/cc (= specific gravity)
kg/m³
lb/in³
lb/ft³

Reference

Full density table.

Material	Family	g/cc	kg/m³	lb/in³	lb/ft³	vs steel
A286 superalloy	Fe-Ni-Cr superalloy	7.94	7,940	0.2869	495.7	1.01×
Acrylic (PMMA)	Engineering plastic	1.18	1,180	0.0426	73.7	0.15×
Aluminum 2024-T3	Aerospace aluminum	2.78	2,780	0.1004	173.5	0.35×
Aluminum 5052	Aluminum	2.68	2,680	0.0968	167.3	0.34×
Aluminum 6061-T6	Aluminum	2.70	2,700	0.0975	168.6	0.34×
Aluminum 7050-T7451	Aerospace aluminum	2.83	2,830	0.1022	176.7	0.36×
Aluminum 7075-T6	Aerospace aluminum	2.81	2,810	0.1015	175.4	0.36×
Aluminum bronze C630	Aluminum bronze	7.58	7,580	0.2738	473.2	0.97×
Beryllium (S-200F)	Light metal	1.85	1,850	0.0668	115.5	0.24×
Beryllium copper C172	Cu-Be alloy	8.36	8,360	0.3020	521.9	1.06×
Brass C260 (cartridge)	Brass	8.53	8,530	0.3082	532.5	1.09×
Brass C360	Free-machining brass	8.50	8,500	0.3071	530.6	1.08×
Bronze C932 (bearing)	Bearing bronze	8.91	8,910	0.3219	556.2	1.14×
Carbon fiber (CFRP)	Composite	1.55	1,550	0.0560	96.8	0.20×
Cobalt-chrome (CoCrMo, F75)	Cobalt alloy	8.30	8,300	0.2999	518.2	1.06×
Copper C110 (ETP)	Pure copper	8.94	8,940	0.3230	558.1	1.14×
Delrin / POM	Engineering plastic	1.42	1,420	0.0513	88.6	0.18×
Duplex 2205	Duplex stainless	7.80	7,800	0.2818	486.9	0.99×
G-10 / FR-4	Composite laminate	1.85	1,850	0.0668	115.5	0.24×
Hastelloy C-276	Nickel superalloy	8.89	8,890	0.3212	555.0	1.13×
Incoloy 825	Nickel-iron alloy	8.14	8,140	0.2941	508.2	1.04×
Inconel 600	Nickel superalloy	8.47	8,470	0.3060	528.8	1.08×
Inconel 625	Nickel superalloy	8.44	8,440	0.3049	526.9	1.08×
Inconel 718	Nickel superalloy	8.19	8,190	0.2959	511.3	1.04×
Invar 36	Controlled-expansion	8.05	8,050	0.2908	502.5	1.03×
Kovar	Controlled-expansion	8.36	8,360	0.3020	521.9	1.06×
M2 high-speed steel	High-speed steel	8.16	8,160	0.2948	509.4	1.04×
Magnesium AZ31	Magnesium alloy	1.78	1,780	0.0643	111.1	0.23×
MIC-6 cast aluminum	Cast aluminum plate	2.80	2,800	0.1012	174.8	0.36×
Molybdenum (Mo)	Refractory metal	10.22	10,220	0.3692	638.0	1.30×
Monel 400	Nickel-copper alloy	8.80	8,800	0.3179	549.4	1.12×
Nickel 200	Commercially pure nickel	8.89	8,890	0.3212	555.0	1.13×
Niobium (Nb)	Refractory metal	8.57	8,570	0.3096	535.0	1.09×
Nitronic 60	Austenitic stainless	7.62	7,620	0.2753	475.7	0.97×
Nylon 6/6	Engineering plastic	1.14	1,140	0.0412	71.2	0.15×
PEEK	Engineering plastic	1.32	1,320	0.0477	82.4	0.17×
Phosphor bronze C510	Phosphor bronze	8.86	8,860	0.3201	553.1	1.13×
Polycarbonate (PC)	Engineering plastic	1.20	1,200	0.0434	74.9	0.15×
PPS (Ryton)	Engineering plastic	1.35	1,350	0.0488	84.3	0.17×
PTFE (Teflon)	Fluoropolymer	2.20	2,200	0.0795	137.3	0.28×
Stainless 13-8 Mo (PH13-8Mo)	PH stainless	7.76	7,760	0.2803	484.4	0.99×
Stainless 15-5PH	PH stainless	7.81	7,810	0.2822	487.6	0.99×
Stainless 17-4PH	PH stainless	7.75	7,750	0.2800	483.8	0.99×
Stainless 17-7PH	PH stainless	7.81	7,810	0.2822	487.6	0.99×
Stainless 303	Austenitic stainless	8.00	8,000	0.2890	499.4	1.02×
Stainless 304	Austenitic stainless	8.00	8,000	0.2890	499.4	1.02×
Stainless 316L	Austenitic stainless	8.00	8,000	0.2890	499.4	1.02×
Stainless 321	Austenitic stainless	8.03	8,030	0.2901	501.3	1.02×
Stainless 347	Austenitic stainless	8.03	8,030	0.2901	501.3	1.02×
Stainless 410	Martensitic stainless	7.80	7,800	0.2818	486.9	0.99×
Stainless 416	Martensitic stainless	7.70	7,700	0.2782	480.7	0.98×
Stainless 440C	Martensitic stainless	7.70	7,700	0.2782	480.7	0.98×
Steel 1018 (mild)	Carbon steel	7.87	7,870	0.2843	491.3	1.00×
Steel 1045	Carbon steel	7.87	7,870	0.2843	491.3	1.00×
Steel 12L14 (free-machining)	Free-machining steel	7.87	7,870	0.2843	491.3	1.00×
Steel 4130	Chromoly steel	7.85	7,850	0.2836	490.1	1.00×
Steel 4140	Alloy steel	7.85	7,850	0.2836	490.1	1.00×
Steel 4340	Alloy steel	7.85	7,850	0.2836	490.1	1.00×
Steel 8620	Carburizing steel	7.85	7,850	0.2836	490.1	1.00×
Tantalum (Ta)	Refractory metal	16.69	16,690	0.6030	1041.9	2.13×
Titanium CP Grade 2	Pure titanium	4.51	4,510	0.1629	281.6	0.57×
Titanium Grade 9 (3Al-2.5V)	Titanium alloy	4.48	4,480	0.1619	279.7	0.57×
Titanium Ti-6Al-4V	Titanium alloy	4.43	4,430	0.1600	276.6	0.56×
Tool steel A2	Air-hardening tool steel	7.86	7,860	0.2840	490.7	1.00×
Tool steel D2	High-carbon tool steel	7.70	7,700	0.2782	480.7	0.98×
Tool steel H13	Hot-work tool steel	7.80	7,800	0.2818	486.9	0.99×
Tool steel O1	Oil-hardening tool steel	7.85	7,850	0.2836	490.1	1.00×
Torlon (PAI)	Engineering plastic	1.42	1,420	0.0513	88.6	0.18×
Tungsten (W)	Refractory metal	19.25	19,250	0.6955	1201.7	2.45×
Tungsten carbide (WC-Co)	Cemented carbide	14.95	14,950	0.5401	933.3	1.90×
Ultem (PEI)	Engineering plastic	1.27	1,270	0.0459	79.3	0.16×
Vespel (PI)	Engineering plastic	1.43	1,430	0.0517	89.3	0.18×
Waspaloy	Nickel superalloy	8.19	8,190	0.2959	511.3	1.04×
Zinc (cast)	Zinc	7.14	7,140	0.2579	445.7	0.91×
Zirconium 702	Reactive metal	6.51	6,510	0.2352	406.4	0.83×

Quick weight math

Estimating part weight from density.

For a roughly prismatic part, weight ≈ volume × density. With volume in in³ and density in lb/in³, you get pounds directly. With volume in cm³ and density in g/cc, you get grams.

Round bar: volume = π/4 × d² × L
Square bar: volume = side² × L
Plate: volume = thickness × width × length
Tube: volume = π/4 × (OD² − ID²) × L

For a complete weight calculator that handles all of these forms, use the material weight calculator.

Keep exploring

Related tools & references

Material weight calculator→

Turn these densities into part and stock weight for any geometry.

Elastic modulus table→

Stiffness values for the same alloy families.

Thermal expansion table→

CTE values to pair with density for thermal and fit work.

Alloy datasheets→

Full property sheets for each material in this table.

Material selector→

Compare alloys by density, strength, and machinability.

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