Drag Force
Estimate aerodynamic or hydrodynamic drag from an entered coefficient.
Your numbers
Drag force magnitude
Idealized SI-unit model for educational estimates. Confirm material properties, boundary conditions and applicability before engineering use.
Scenario comparison
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Formula
Use F = ρv²C_dA/2. ρ is fluid density in kg/m³, v is relative speed in m/s, C_d is the entered drag coefficient, and A is reference frontal area in m². Drag magnitude F is in N.
Estimate aerodynamic or hydrodynamic drag from an entered coefficient.
Worked example
- Fluid density (kg/m³)
- 1.225
- Relative speed (m/s)
- 10
- Drag coefficient
- 0.5
- Reference frontal area (m²)
- 1
- Drag force magnitude
- 30.625 N
Scope and limitations
Idealized SI-unit model for educational estimates. Confirm material properties, boundary conditions and applicability before engineering use.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 0414b3d014bb · Example checked: