What Is This Tool?
This tool converts dynamic viscosity values from pound/foot/hour (lb/(ft*h)) to pound-force second per square foot (lbf·s/ft²). It is designed for use in engineering fields that utilize Imperial or US-customary units for fluid viscosity.
How to Use This Tool?
-
Enter the viscosity value in pound/foot/hour (lb/(ft*h)) you wish to convert
-
Select pound-force second/sq. foot as the target unit
-
Click the convert button to see the equivalent viscosity result
-
Use the result for engineering calculations or technical documentation
Key Features
-
Converts between pound/foot/hour and pound-force second/sq. foot viscosity units
-
Supports shear stress and velocity gradient related measurements
-
Ideal for petroleum, lubrication, and industrial fluid viscosity calculations
-
Offers unit conversion based on industry-standard formulas
-
Browser-based and easy to use without software installation
Examples
-
10 pound/foot/hour equals 0.000086335972699004 pound-force second/sq. foot
-
500 pound/foot/hour equals 0.00431679863495 pound-force second/sq. foot
Common Use Cases
-
Specifying lubricant or oil viscosity in legacy or US‑customary engineering data sheets
-
Conducting pipe flow and pump design calculations requiring lbf·s/ft² viscosity units
-
Empirical rheology measurements for heavy oils, greases, and industrial sludges
-
Translating viscosity values from hour-based to second-based units in engineering
-
Reporting viscosity data for fuels and process fluids in regional technical documents
Tips & Best Practices
-
Clearly specify units when exchanging viscosity data to avoid confusion
-
Maintain numerical precision when converting values with very small or large magnitudes
-
Use this conversion to ensure compatibility between legacy and current engineering standards
-
Validate converted results within the context of your specific application or document
-
Apply consistent units throughout your engineering calculations for accurate outcomes
Limitations
-
Small conversion factor requires careful attention to numerical precision
-
Differences in time unit conventions (hour vs. second) may lead to errors if not handled properly
-
Limited to dynamic viscosity measurements in Imperial or US-customary units only
Frequently Asked Questions
-
What does pound/foot/hour measure in viscosity?
-
Pound/foot/hour is an imperial unit of dynamic viscosity expressing a fluid's internal resistance to shear related to force, time, and area in hour-based units.
-
Why convert pound/foot/hour to pound-force second/sq. foot?
-
Converting allows compatibility between hour-based and second-based units, aligning with common engineering practices requiring finer time resolution in viscosity measurements.
-
Where is pound-force second per square foot commonly used?
-
It is used for specifying or testing viscosity in heavy oils, greases, and industrial fluids within petroleum and lubrication engineering using Imperial units.
Key Terminology
-
Pound/foot/hour [lb/(ft*h)]
-
An engineering unit for dynamic viscosity in Imperial units representing force multiplied by time per unit area with a time basis of hours.
-
Pound-force second/sq. foot [lbf·s/ft²]
-
An Imperial unit of dynamic viscosity indicating the resistance to shear flow with time measured in seconds per square foot.
-
Dynamic viscosity
-
A fluid property expressing internal resistance to flow due to shear stress and velocity gradients.