The difference between density, specific weight, and specific gravity. Including formulas, definitions, and reference values for common substances.

In fluid mechanics, specific weight represents the force exerted by gravity on a unit volume of a fluid. For this reason, units are expressed as force per unit volume (e.g., N/m 3 or lbf/ft 3).

Specific weight is defined as the ratio between weight and volume. Specific weight can also be defined as the product between density and gravitational acceleration.

Specific weight = weight / volume. Where: The SI unit of specific weight is Newton per cubic meter (N/m 3). The US customary unit of specific weight is pounds-force per cubic foot (lbf/ft 3). The …

Nov 10, 2025 · Specific weight is defined as the weight exerted by a substance per unit of its volume, often represented by the Greek letter gamma (gamma). This relationship is expressed …

Specific weight represents a material’s weight per unit of its volume. It quantifies the force exerted by gravity on a given substance within a defined space. Specific weight is calculated by …

The use of specific weight is most often encountered in civil engineering projects in the United States, where it is commonly called “density.” The usual units of specific weight are lbf/ft 3.

Dec 25, 2024 · Definition and Formula The specific weight of a substance is defined as the weight of the substance per unit volume. Mathematically, it is represented as: γ = ρg

Learn about specific weight and its relationship with density. Understand the formula for calculating specific weight and its applications in various scientific fields.

Nov 11, 2025 · It is denoted by the symbol w (sometimes γ) and is measured in newtons per cubic meter (N/m³). The formula for specific weight is: where ρ = density of the fluid (kg/m³), and g = …