ONE FORMULA, ONE ANSWER
Displaced Fluid Buoyancy Calculator
Calculate buoyancy from the weight of displaced fluid. Choose input units and calculate one value within the stated conditions.
Inputs
Calculations run in this browser. Scientific notation such as 1.2e-3 is supported. Do not group thousands.
Result
Buoyant force magnitude F_B
Enter values and select Calculate.
F_B = ρgV_disp
Assumptions
Required: ρ,g>0, V_disp≥0 and a stationary uniform-density fluid. Use submerged displaced volume, not automatically the full object volume. Floating classification and stability are excluded.
Displayed values are floating-point approximations. Design safety factors and unprovided error contributions are not calculated.
Formula references and credits
NaNa Lab created the code, descriptions, icons and preview images. Text, figures and code from the linked references have not been reproduced.
Physical constants: NIST / CODATA 2022. The values of μ₀ and ε₀ are measured recommendations, not exact defining constants. Values and precision notes are in the source record.
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