Froude Number Calculator
Apply Fr = v/√(gL) with explicit compatible units.
A QUICK WALKTHROUGH
How to use this tool
- Enter velocity and select its unit.
- Enter characteristic length and gravitational acceleration.
- Calculate the dimensionless Froude number.
Formula and units
The calculator converts velocity to m/s and length to m, then applies Fr = v/√(gL). Gravitational acceleration is entered in m/s² and the result has no unit.
Calculation-only scope
Characteristic length depends on the system being studied. This tool performs the stated arithmetic only and does not classify flow or provide engineering guidance.
GOOD TO KNOW
Common questions
Does the result have a unit?
No. Froude number is dimensionless when compatible units are used.
Which characteristic length should I enter?
Use the length defined by your selected model or reference; the calculator does not choose it.