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Buoyancy Calculator

Science & Engineering

Archimedes principle, float or sink

Quick Answer

Buoyancy Calculator: Archimedes principle, float or sink. Buoyancy Calculator uses standard science & engineering formulas to compute accurate results instantly.

kg/m³
m³
kg
Buoyant force (fully submerged)
686.7 N
Floats — partially submerged

Calculation steps

  1. 1Buoyancy: F = ρ_fluid × V × g = 1000 × 0.07 × 9.81 = 686.7 N
  2. 2Weight: W = m × g = 66 × 9.81 = 647.5 N
  3. 3Object density: ρ = m/V = 943 kg/m³ vs fluid 1000 kg/m³
  4. 4ρ_object < ρ_fluid → floats
Buoyancy686.7 N
Weight647.5 N
Apparent weight in fluid-39.2 N
Submerged %94.3%

Common material densities (kg/m³)

MaterialDensityIn fresh water
Ice917Floats
Pine wood500Floats
Human (inhale)945Floats
Human (exhale)1020Sinks
Iron7874Sinks
Aluminum2700Sinks
Gold19300Sinks
A floating object displaces exactly its own weight of fluid — that is why icebergs sit ~91.7% underwater (917/1000) and why you float higher in the Dead Sea. Ships made of steel float because their hull encloses air, making average density far below water.

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How to Use

  1. Enter known quantities: fill values and confirm units in the Buoyancy Calculator.
  2. Instant solution: unknowns solve live with the formula shown transparently.
  3. Use constant/material tables: standard physical constants and material data are listed on this page.
  4. Compare conditions: change inputs to compare scenarios.

Key Points

  • Buoyancy Calculator is a free online science & engineering tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Archimedes principle, float or sink.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Buoyancy Calculator formula

Buoyancy Calculator uses standard science & engineering formulas to compute accurate results instantly.

FAQ

How do I use the Buoyancy Calculator?
Open the page and fill in the input fields — results update automatically. Archimedes principle, float or sink.
Are the results accurate?
Yes. Standard formulas and conversion factors are used and verified.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. Everything runs locally in your browser.

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Source & Updates

Based on CODATA recommended constants and standard physics formulas. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Buoyancy Calculator[EB/OL]. https://www.yijiansuan.com/en/c/science/buoyancy

Results provided by this tool are for reference only and do not constitute professional advice.