Convert Poise to Pounds per foot-hour
Instantly convert Poise (P) to Pounds per foot-hour (lb/(ft·hr)) with our free online calculator.
Formula: P to lb/(ft·hr) — multiply by 241.909
Reference Table
| Poise (P) | Pounds per foot-hour (lb/(ft·hr)) |
|---|---|
| 1 | 241.909 |
| 5 | 1209.54 |
| 10 | 2419.09 |
| 25 | 6047.72 |
| 50 | 12095.4 |
| 100 | 24190.9 |
How to Convert Poise to Pounds per foot-hour
Formula
To convert Poise (P) to Pounds per foot-hour (lb/(ft·hr)): multiply by 241.909
Step-by-Step
- Start with your value in Poise (P).
- Multiply by 241.909 to perform the conversion.
- The result is your value expressed in Pounds per foot-hour (lb/(ft·hr)).
Conversion Factor
1 P = 241.909 lb/(ft·hr)
Reverse Factor
1 lb/(ft·hr) = 0.00413379 P
Worked Example
Convert 25 Poise to Pounds per foot-hour: 25 P = 6047.72 lb/(ft·hr)
About Poise (P)
The CGS unit of dynamic viscosity, equal to exactly 0.1 Pa·s. Named after French physician Jean Léonard Marie Poiseuille, whose 1840s experimental and theoretical work on blood-flow in small tubes produced the Hagen-Poiseuille equation that underpins modern laminar-flow analysis. Although superseded by Pa·s in modern SI usage, the poise still appears in: older fluid-dynamics literature (pre-1980 US and European textbooks), geophysics and Earth-science publications for highly viscous fluids where the magnitude is convenient (asthenosphere ~10¹⁸ P, lower mantle ~10²² P, basaltic lava 10² to 10⁴ P at eruption temperature, rhyolitic lava 10⁹ to 10¹¹ P), glass-manufacturing process tables (the working point of glass = 10⁴ P; softening point = 10⁷·⁶ P; annealing point = 10¹³·² P; strain point = 10¹⁴·⁵ P), and some polymer-rheology / extrusion literature where melt viscosities of 10⁴ to 10⁷ P are common.
About Pound per foot-hour (lb/(ft·hr))
An imperial dynamic-viscosity unit using pound-mass per foot-hour (≈ 4.1338 × 10⁻⁴ Pa·s = 0.4134 cP per NIST SP 811 = exactly 1/3,600 of lb/(ft·s)). Used in US process-engineering and HVAC contexts where the natural process timescale is hours rather than seconds — making the time-base of the viscosity unit match the time-base of the mass-flow or heat-flow calculation it appears in, eliminating intermediate unit conversions. Common in heat-transfer-coefficient correlations for gas-phase viscosity at industrial operating conditions (gas viscosity is ~10⁻⁵ Pa·s, which in lb/(ft·hr) becomes ~0.02 — a much more legible number than the SI version). Also appears in older US chemical-engineering handbooks (Perry's pre-2008 editions, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot first edition), refining-process design references where the entire material/energy balance is in lb-h-ft-Btu units, and gas-pipeline transmission design per AGA Report No. 8 and 10 supercompressibility tables. Convert lb/(ft·hr) to Pa·s by multiplying by 4.1338 × 10⁻⁴; to cP by multiplying by 0.4134.
Quick Facts
- 1 Poise equals 241.909 Pounds per foot-hour
- 1 Pound per foot-hour equals 0.00413379 Poise
- Poise is a unit of dynamic viscosity
- Pound per foot-hour is a unit of dynamic viscosity
- This conversion is commonly used in lubricant selection, chemical processing, and fluid dynamics
- The Poise belongs to the metric system
- The Pound per foot-hour belongs to the imperial system
Common Poise to Pound per foot-hour Conversions
| Poise (P) | Pounds per foot-hour (lb/(ft·hr)) |
|---|---|
| 0.01 | 2.41909 |
| 0.1 | 24.1909 |
| 0.25 | 60.4772 |
| 0.5 | 120.954 |
| 1 | 241.909 |
| 2 | 483.818 |
| 3 | 725.726 |
| 5 | 1209.54 |
| 10 | 2419.09 |
| 15 | 3628.63 |
| 20 | 4838.18 |
| 25 | 6047.72 |
| 50 | 12095.4 |
| 75 | 18143.2 |
| 100 | 24190.9 |
| 250 | 60477.2 |
| 500 | 120954 |
| 1000 | 241909 |
| 5000 | 1209540 |
| 10000 | 2419090 |
Understanding Poise
The Poise (symbol: P) is a unit of dynamic viscosity. The CGS unit of dynamic viscosity, equal to exactly 0.1 Pa·s. Named after French physician Jean Léonard Marie Poiseuille, whose 1840s experimental and theoretical work on blood-flow in small tubes produced the Hagen-Poiseuille equation that underpins modern laminar-flow analysis. Although superseded by Pa·s in modern SI usage, the poise still appears in: older fluid-dynamics literature (pre-1980 US and European textbooks), geophysics and Earth-science publications for highly viscous fluids where the magnitude is convenient (asthenosphere ~10¹⁸ P, lower mantle ~10²² P, basaltic lava 10² to 10⁴ P at eruption temperature, rhyolitic lava 10⁹ to 10¹¹ P), glass-manufacturing process tables (the working point of glass = 10⁴ P; softening point = 10⁷·⁶ P; annealing point = 10¹³·² P; strain point = 10¹⁴·⁵ P), and some polymer-rheology / extrusion literature where melt viscosities of 10⁴ to 10⁷ P are common.
It belongs to the metric measurement system.
Poise are commonly used in lubricant selection, chemical processing, and fluid dynamics.
Understanding Pounds per foot-hour
The Pound per foot-hour (symbol: lb/(ft·hr)) is a unit of dynamic viscosity. An imperial dynamic-viscosity unit using pound-mass per foot-hour (≈ 4.1338 × 10⁻⁴ Pa·s = 0.4134 cP per NIST SP 811 = exactly 1/3,600 of lb/(ft·s)). Used in US process-engineering and HVAC contexts where the natural process timescale is hours rather than seconds — making the time-base of the viscosity unit match the time-base of the mass-flow or heat-flow calculation it appears in, eliminating intermediate unit conversions. Common in heat-transfer-coefficient correlations for gas-phase viscosity at industrial operating conditions (gas viscosity is ~10⁻⁵ Pa·s, which in lb/(ft·hr) becomes ~0.02 — a much more legible number than the SI version). Also appears in older US chemical-engineering handbooks (Perry's pre-2008 editions, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot first edition), refining-process design references where the entire material/energy balance is in lb-h-ft-Btu units, and gas-pipeline transmission design per AGA Report No. 8 and 10 supercompressibility tables. Convert lb/(ft·hr) to Pa·s by multiplying by 4.1338 × 10⁻⁴; to cP by multiplying by 0.4134.
It belongs to the imperial measurement system.
Pounds per foot-hour are commonly used in lubricant selection, chemical processing, and fluid dynamics.
Why Convert Poise to Pounds per foot-hour?
Converting between Poise and Pounds per foot-hour is a frequent requirement for engineers, scientists, and students working with dynamic viscosity values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate dynamic viscosity conversion is essential.
Frequently Asked Questions
How do I convert Poise to Pounds per foot-hour?
The CGS unit of dynamic viscosity, equal to exactly 0. To convert Poise to Pounds per foot-hour, multiply by 241.909. For example, 25 P equals 6047.72 lb/(ft·hr).
How many Pounds per foot-hour are in 1 Poise?
There are 241.909 Pounds per foot-hour in 1 Poise.
How many Poise are in 1 Pound per foot-hour?
There are 0.00413379 Poise in 1 Pound per foot-hour.
What is the formula for Poise to Pound per foot-hour conversion?
The formula is: multiply by 241.909. This means 1 P = 241.909 lb/(ft·hr).
Is a Poise bigger than a Pound per foot-hour?
No. One Poise is smaller than one Pound per foot-hour because 1 P equals 241.909 lb/(ft·hr), which is greater than 1.
When do you need to convert between Poise and Pounds per foot-hour?
An imperial dynamic-viscosity unit using pound-mass per foot-hour (≈ 4. Poise and Pound per foot-hour are both dynamic viscosity units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.