Convert Pascal-seconds to Pounds per foot-second
Instantly convert Pascal-seconds (Pa·s) to Pounds per foot-second (lb/(ft·s)) with our free online calculator.
Formula: Pa·s to lb/(ft·s) — multiply by 0.671971
Reference Table
| Pascal-seconds (Pa·s) | Pounds per foot-second (lb/(ft·s)) |
|---|---|
| 1 | 0.671971 |
| 5 | 3.35985 |
| 10 | 6.71971 |
| 25 | 16.7993 |
| 50 | 33.5985 |
| 100 | 67.1971 |
How to Convert Pascal-seconds to Pounds per foot-second
Formula
To convert Pascal-seconds (Pa·s) to Pounds per foot-second (lb/(ft·s)): multiply by 0.671971
Step-by-Step
- Start with your value in Pascal-seconds (Pa·s).
- Multiply by 0.671971 to perform the conversion.
- The result is your value expressed in Pounds per foot-second (lb/(ft·s)).
Conversion Factor
1 Pa·s = 0.671971 lb/(ft·s)
Reverse Factor
1 lb/(ft·s) = 1.48816 Pa·s
Worked Example
Convert 25 Pascal-seconds to Pounds per foot-second: 25 Pa·s = 16.7993 lb/(ft·s)
About Pascal-second (Pa·s)
The SI unit of dynamic (absolute) viscosity (ISO 80000-4 §4-32) — the ratio of shear stress to velocity gradient in a flowing Newtonian fluid (τ = μ · du/dy). Pa·s is the universal reference unit in fluid mechanics research, CFD solver inputs (Ansys Fluent, OpenFOAM, COMSOL all use Pa·s internally), rheology and tribology research, lubricant film calculations, and polymer melt-flow analysis. Reference values: water at 20 °C is 1.002 × 10⁻³ Pa·s (the calibration baseline), air at 20 °C is 1.81 × 10⁻⁵ Pa·s (~55× less viscous than water), SAE 30 engine oil at 40 °C ≈ 0.1 Pa·s, honey at room temperature ~10 Pa·s, peanut butter ~250 Pa·s, the asthenosphere of Earth's mantle ~10¹⁹ Pa·s. Glass at its working temperature (~1,400 °C) is ~100 Pa·s; at its glass-transition temperature ~10¹² Pa·s — the conventional definition of Tg. Convert Pa·s to cP (centipoise) by multiplying by 1,000; to lb/(ft·s) by dividing by 1.488.
About Pound per foot-second (lb/(ft·s))
An imperial dynamic-viscosity unit using pound-mass per foot-second (≈ 1.4882 Pa·s per NIST SP 811 = 1,488 cP). Primarily encountered in US petroleum engineering (older API and SPE journal articles quote downhole-fluid viscosities in lb/(ft·s) alongside cP for drilling-fluid rheology and well-cementing calcs per API RP 13B), legacy ASME fluid-mechanics and heat-transfer textbooks (older editions of Streeter, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot, Incropera-DeWitt), and HVAC calculations performed in fully-imperial unit systems where consistency with lb / ft / s eliminates conversion factors in Reynolds-number and Prandtl-number dimensionless-group formulas. Most modern US engineering has migrated to centipoise / Pa·s for new work; lb/(ft·s) is most useful for interpreting pre-1990s US-edition specifications, journal articles, and ASME-code background calculation derivations. Convert lb/(ft·s) to Pa·s by multiplying by 1.4882; to cP / mPa·s by multiplying by 1,488.2; to lb/(ft·hr) by multiplying by 3,600.
Quick Facts
- 1 Pascal-second equals 0.671971 Pounds per foot-second
- 1 Pound per foot-second equals 1.48816 Pascal-seconds
- Pascal-second is a unit of dynamic viscosity
- Pound per foot-second is a unit of dynamic viscosity
- This conversion is commonly used in lubricant selection, chemical processing, and fluid dynamics
- The Pascal-second belongs to the metric system
- The Pound per foot-second belongs to the imperial system
Common Pascal-second to Pound per foot-second Conversions
| Pascal-seconds (Pa·s) | Pounds per foot-second (lb/(ft·s)) |
|---|---|
| 0.01 | 0.00671971 |
| 0.1 | 0.0671971 |
| 0.25 | 0.167993 |
| 0.5 | 0.335985 |
| 1 | 0.671971 |
| 2 | 1.34394 |
| 3 | 2.01591 |
| 5 | 3.35985 |
| 10 | 6.71971 |
| 15 | 10.0796 |
| 20 | 13.4394 |
| 25 | 16.7993 |
| 50 | 33.5985 |
| 75 | 50.3978 |
| 100 | 67.1971 |
| 250 | 167.993 |
| 500 | 335.985 |
| 1000 | 671.971 |
| 5000 | 3359.85 |
| 10000 | 6719.71 |
Understanding Pascal-seconds
The Pascal-second (symbol: Pa·s) is a unit of dynamic viscosity. The SI unit of dynamic (absolute) viscosity (ISO 80000-4 §4-32) — the ratio of shear stress to velocity gradient in a flowing Newtonian fluid (τ = μ · du/dy). Pa·s is the universal reference unit in fluid mechanics research, CFD solver inputs (Ansys Fluent, OpenFOAM, COMSOL all use Pa·s internally), rheology and tribology research, lubricant film calculations, and polymer melt-flow analysis. Reference values: water at 20 °C is 1.002 × 10⁻³ Pa·s (the calibration baseline), air at 20 °C is 1.81 × 10⁻⁵ Pa·s (~55× less viscous than water), SAE 30 engine oil at 40 °C ≈ 0.1 Pa·s, honey at room temperature ~10 Pa·s, peanut butter ~250 Pa·s, the asthenosphere of Earth's mantle ~10¹⁹ Pa·s. Glass at its working temperature (~1,400 °C) is ~100 Pa·s; at its glass-transition temperature ~10¹² Pa·s — the conventional definition of Tg. Convert Pa·s to cP (centipoise) by multiplying by 1,000; to lb/(ft·s) by dividing by 1.488.
It belongs to the metric measurement system.
Pascal-seconds are commonly used in lubricant selection, chemical processing, and fluid dynamics.
Understanding Pounds per foot-second
The Pound per foot-second (symbol: lb/(ft·s)) is a unit of dynamic viscosity. An imperial dynamic-viscosity unit using pound-mass per foot-second (≈ 1.4882 Pa·s per NIST SP 811 = 1,488 cP). Primarily encountered in US petroleum engineering (older API and SPE journal articles quote downhole-fluid viscosities in lb/(ft·s) alongside cP for drilling-fluid rheology and well-cementing calcs per API RP 13B), legacy ASME fluid-mechanics and heat-transfer textbooks (older editions of Streeter, McCabe-Smith-Harriott, Bird-Stewart-Lightfoot, Incropera-DeWitt), and HVAC calculations performed in fully-imperial unit systems where consistency with lb / ft / s eliminates conversion factors in Reynolds-number and Prandtl-number dimensionless-group formulas. Most modern US engineering has migrated to centipoise / Pa·s for new work; lb/(ft·s) is most useful for interpreting pre-1990s US-edition specifications, journal articles, and ASME-code background calculation derivations. Convert lb/(ft·s) to Pa·s by multiplying by 1.4882; to cP / mPa·s by multiplying by 1,488.2; to lb/(ft·hr) by multiplying by 3,600.
It belongs to the imperial measurement system.
Pounds per foot-second are commonly used in lubricant selection, chemical processing, and fluid dynamics.
Why Convert Pascal-seconds to Pounds per foot-second?
Converting between Pascal-seconds and Pounds per foot-second 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 Pascal-seconds to Pounds per foot-second?
The SI unit of dynamic (absolute) viscosity (ISO 80000-4 §4-32) — the ratio of shear stress to velocity gradient in a flowing Newtonian fluid (τ = μ · du/dy). To convert Pascal-seconds to Pounds per foot-second, multiply by 0.671971. For example, 25 Pa·s equals 16.7993 lb/(ft·s).
How many Pounds per foot-second are in 1 Pascal-second?
There are 0.671971 Pounds per foot-second in 1 Pascal-second.
How many Pascal-seconds are in 1 Pound per foot-second?
There are 1.48816 Pascal-seconds in 1 Pound per foot-second.
What is the formula for Pascal-second to Pound per foot-second conversion?
The formula is: multiply by 0.671971. This means 1 Pa·s = 0.671971 lb/(ft·s).
Is a Pascal-second bigger than a Pound per foot-second?
Yes. One Pascal-second is larger than one Pound per foot-second because 1 Pa·s equals 0.671971 lb/(ft·s), which is less than 1.
When do you need to convert between Pascal-seconds and Pounds per foot-second?
An imperial dynamic-viscosity unit using pound-mass per foot-second (≈ 1. Pascal-second and Pound per foot-second 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.