Density (ρ) is mass per unit volume, typically in kg/m³ or g/cm³. It describes how tightly matter is packed. Steel ≈ 7850 kg/m³, aluminum ≈ 2700 kg/m³, water = 1000 kg/m³.

Ninawezaje kuhesabu uzito kutoka kwa wiani na ujazo?

Mass = Density × Volume (m = ρ × V). For example: a 0.5 m³ block of steel (7850 kg/m³) weighs 7850 × 0.5 = 3925 kg.

Ninawezaje kuhesabu ujazo kutoka kwa vipimo?

Cube: V=a³. Cylinder: V=π×r²×h. Sphere: V=4/3×π×r³. Hollow cylinder: V=π×(R²-r²)×h. Cone: V=1/3×π×r²×h.

Mzigo wa kuelea (buoyancy) ni nini?

Buoyancy force equals the weight of displaced fluid: F_b = ρ_fluid × V × g. An object floats if its density is less than the fluid density. Steel sinks in water (7850 > 1000 kg/m³).

Uzito maalum ni nini?

Specific gravity (SG) is the ratio of a material's density to water density (1000 kg/m³). It is dimensionless. Steel SG ≈ 7.85, aluminum SG ≈ 2.70, titanium SG ≈ 4.51.

Zana ya Uhandisi Isiyolipisha

Kikokotoo cha Uzani / Raia / Kiasi

Hesabu kigezo kimoja kati ya wiani, uzito, au ujazo. Mpangilio zaidi ya 30 wa nyenzo, kikokotoo cha ujazo kulingana na umbo, ukaguzi wa mzigo wa kuelea, na matokeo katika vitengo vingi.

ρ = m / V 30+ Materials Shape Volume Buoyancy

Solve For

Mpangilio wa Nyenzo

Density ρ (kg/m³)

Ujazo kutoka kwa Umbo

Mass (kg)

Volume (m³)

Urefu / Upande a (mm)

Width b (mm)

Urefu wa Juu / Urefu h (mm)

Outer Radius R (mm)

Inner Radius r (mm, yenye shimo tu)

Quick presets

Results

Density ρ

—

Mass m

—

Volume V

—

Uzito (vitengo vingi)

—

Uzito Maalum

—

Kuelea Majini

—

Fomula za Msingi

Fomula za Kiasi kwa Maumbo

Buoyancy

An object floats if ρ_object < ρ_fluid. The net submerged weight = m×g − ρ_fluid×V×g.

Mfano wa Vitendo

Mfano — Silinda ya chuma yenye shimo (bomba)

Given: OD=100mm, ID=80mm, Length=500mm, ρ=7850 kg/m³

V = π×(50²−40²)×500 = π×(2500−1600)×500 = 1,413,717 mm³ = 0.001414 m³

m = 7850 × 0.001414 = 11.1 kg = 24.4 lb

Weight in water: F_b = 1000 × 0.001414 × 9.81 = 13.87 N → submerged weight = 95.0 N

Hifadhidata ya Msongamano wa Nyenzo

Material	kg/m³	g/cm³	lb/ft³
Carbon Steel	7,850	7.85	490
Stainless 304	7,930	7.93	495
Stainless 316	8,000	8.00	499
Chuma Laini (Kijivu)	7,200	7.20	449
Aluminum 6061	2,700	2.70	169
Aluminum 7075	2,810	2.81	175
Copper	8,900	8.90	556
Brass	8,500	8.50	531
Bronze	8,800	8.80	549
Titanium	4,510	4.51	282
Magnesium	1,740	1.74	109
Lead	11,340	11.34	708
Nickel	8,908	8.91	556
Gold	19,300	19.30	1,205
HDPE	920	0.92	57
PVC	1,400	1.40	87
PTFE (Teflon)	2,200	2.20	137
Concrete	2,500	2.50	156
Glass	2,200	2.20	137
Oak Wood	600	0.60	37
Water (20°C)	1,000	1.00	62.4
Seawater	1,025	1.025	64.0
Diesel Fuel	870	0.87	54.3

Kikokotoo cha Wiani Uzito Ujazo | ρ=m/V | Kikokotoo cha Umbo | Zana ya Bure

Published by Nikolai Shelkovenko on Febuari 15, 2026 Febuari 15, 2026

Results

Fomula za Msingi

Fomula za Kiasi kwa Maumbo

Buoyancy

Mfano wa Vitendo

Hifadhidata ya Msongamano wa Nyenzo

Duka

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