Buoyancy Calculator
Calculate buoyant force, submerged fraction, and whether an object floats or sinks in various fluids
Buoyancy Calculator
F_b = ρ_fluid · V_displaced · g (Archimedes' Principle)
V = 1.0000e-3 m³ = 1.0000 L
Wood~500 · Ice~917 · Steel~7850
1.0 = fully submerged
Float / Sink
FLOATS
ρ_obj (500.0 kg/m³) < ρ_fluid (998.2 kg/m³)
Equilibrium: 50.1% submerged
Forces
Buoyant Force F_b
9.79 N
upward
Object Weight W
4.91 N
downward
Net Force
4.89 N
upward
Formula
F_b = ρ_f·V_d·g = 998.2·1.0000e-3·9.81
= 9.79 N
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Buoyancy Calculator. Most fields include unit selectors so you can work in your preferred unit system.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors.
Read the results
The Buoyancy Calculator instantly computes the output and displays results with units. All calculations happen in your browser — no loading time and no data sent to a server.
Formula Reference
Buoyancy Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above.
When to Use This Calculator
- •Use the Buoyancy Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
- •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
- •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
- •Use it to generate reference data for a technical report or presentation without manual computation.
Related Calculators
Reynolds Number Calculator
Calculate Reynolds number and classify flow as laminar, transitional, or turbulent with common fluid presets
Bernoulli Equation Calculator
Solve for any unknown in the Bernoulli equation given pressure, velocity, and elevation at two points
Darcy-Weisbach Calculator
Calculate head loss and pressure drop in pipes using the Darcy-Weisbach equation with friction factor
Moody Chart Calculator
Calculate Darcy friction factor from Reynolds number and relative roughness using Colebrook-White and Swamee-Jain
Pump Power Calculator
Calculate hydraulic power, shaft power, and NPSH for centrifugal pumps from flow rate, head, and efficiency
Orifice Flow Calculator
Calculate volumetric flow rate through an orifice from discharge coefficient, area, and pressure drop