Pound Force Seconds/sq. inch to Pounds/foot/second Converter (reyn to lb/(ft·s))

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Live Conversion • ISO 80000-4:2019 Certified

1 Pound-force second/sq. inch = 4633.06279513 Pound/foot/second

1 reyn = 4633.062795 lb/(ft·s) • 1 lb/(ft·s) = 0.00021584 reyn

Decimals:

Certified Authority Value

4633.06279513

lb/(ft·s)

From / Input

reyn

Swap to Pound/foot/second to Pound-force second/sq. inch

To / Result

lb/(ft·s)

Quick Values:

Conversion Formula

To convert Pound-force second/sq. inch to Pound/foot/second, multiply by 4633.06279513

reyn × 4633.06279513 = lb/(ft·s)

Calculation: 1 reyn × 4633.06279513 = 4633.06279513 lb/(ft·s)

Common Pound-force second/sq. inch to Pound/foot/second Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Pound-force second/sq. inch (reyn) and Pound/foot/second (lb/(ft·s)).

Tap any row to calculate

Pound-force second/sq. inch to Pound/foot/second: Primary Direct Table (15 Steps)

Rule: 1 Pound-force second/sq. inch is equal to 4633.062795 lb/(ft·s) (Pound/foot/second)

Pound-force second/sq. inch to Pound/foot/second Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 reyn 4.633063 lb/(ft·s)	4.633 × 10⁰
0.01 reyn 46.330628 lb/(ft·s)	4.633 × 10¹
0.1 reyn 463.30628 lb/(ft·s)	4.633 × 10²
0.5 reyn 2316.531398 lb/(ft·s)	2.317 × 10³
1 reyn 4633.062795 lb/(ft·s)	4.633 × 10³
2 reyn 9266.12559 lb/(ft·s)	9.266 × 10³
5 reyn 23165.313976 lb/(ft·s)	2.317 × 10⁴
10 reyn 46330.627951 lb/(ft·s)	4.633 × 10⁴
20 reyn 92661.255903 lb/(ft·s)	9.266 × 10⁴
25 reyn 115826.569878 lb/(ft·s)	1.158 × 10⁵
50 reyn 231653.139756 lb/(ft·s)	2.317 × 10⁵
100 reyn 463306.279513 lb/(ft·s)	4.633 × 10⁵
250 reyn 1158265.698781 lb/(ft·s)	1.158 × 10⁶
500 reyn 2316531.397563 lb/(ft·s)	2.317 × 10⁶
1000 reyn 4633062.795126 lb/(ft·s)	4.633 × 10⁶

Pound/foot/second to Pound-force second/sq. inch: Reciprocal Summary

Rule: 1 Pound/foot/second is equal to 0.00021584 reyn (Pound-force second/sq. inch)

Pound/foot/second to Pound-force second/sq. inch Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 lb/(ft·s) 0.00021584 reyn	2.158 × 10⁻⁴
5 lb/(ft·s) 0.0010792 reyn	1.079 × 10⁻³
10 lb/(ft·s) 0.0021584 reyn	2.158 × 10⁻³
50 lb/(ft·s) 0.010792 reyn	1.079 × 10⁻²
100 lb/(ft·s) 0.021584 reyn	2.158 × 10⁻²

View Complete 15-Row Pound/foot/second to Pound-force second/sq. inch Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Pound-force second/sq. inch (reyn) and Pound/foot/second (lb/(ft·s)):

Pound-force second/sq. inch References:

Pure drinking water dynamic viscosity at 20 degrees Celsius 0 reyn
Culinary extra virgin olive oil dynamic viscosity at room temperature 1.2E-5 reyn
Automotive engine motor oil SAE 30 dynamic viscosity at 20°C 2.9E-5 reyn
Pure natural clover bee honey dynamic viscosity at room temperature 0.00145 reyn

Pound/foot/second References:

Liquid water dynamic viscosity in imperial piping calculations 0.00067 lb/(ft·s)

Tap any benchmark above to automatically calculate its exact equivalent in Pound/foot/second.

ISQ Dimension: [M L⁻¹ T⁻¹] Coherent SI Unit: pascal second (Pa·s) Fluid Dynamics & Rheology

How to Convert Pound-force second/sq. inch to Pound/foot/second

Converting Pound-force second/sq. inch (reyn) to Pound/foot/second (lb/(ft·s)) is a core calculation in Dynamic Viscosity, which quantifies a fluid's internal tangential resistance to shear deformation and laminar flow. This calculation navigates the boundary between the International Metric System (SI) and British Imperial / US Customary engineering standards. In contemporary metrology, Imperial units are defined in terms of exact SI standards via international agreements—notably NIST SP 811 and the 1959 International Yard and Pound Agreement. Exactly 1 Pound-force second/sq. inch equals 4633.062795 Pound/foot/second, while 1 lb/(ft·s) equals 0.00021584 reyn.

Direct Factor1 reyn = 4633.062795 lb/(ft·s)

Inverse Ratio1 lb/(ft·s) = 0.00021584 reyn

Conversion ScaleMetric SI to British Imperial / US Customary Bridge

First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (pascal second (Pa·s)) without arbitrary rounding:

V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)

Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)

1. Source SI Bridge (k_source):1 reyn = 6894.757 pascal second (Pa·s)

2. Target SI Bridge (k_target):1 lb/(ft·s) = 1.488164 pascal second (Pa·s)

Step-by-step substitution for Pound-force second/sq. inch → Pound/foot/second:V(lb/(ft·s)) = V(reyn) × ( 6894.757 / 1.488164 ) = V(reyn) × 4633.062795

Mathematical FormulaValue in Pound/foot/second = Value in Pound-force second/sq. inch × 4633.06279513Direct computational formula applied for standard conversion.

Worked Example

For an engineering input of 36 reyn, applying the conversion factor yields exactly 166790.260625 lb/(ft·s). At larger operational scale, 2500 Pound-force second/sq. inch corresponds to 1.158266 × 10⁷ lb/(ft·s).

Inverse check: 1 lb/(ft·s) = 0.00021584 reyn.

Understanding Pound-force second/sq. inch and Pound/foot/second

Domain Metrology & Engineering Applications

Governing Law & Equation

Newton's Law of Viscosity (τ = μ · du/dy)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using rotational cone-and-plate rheometers, falling ball Höppler viscometers, and vibrating wire viscometers.

Primary Industry Sectors

Applied across lubricating oil tribology (SAE engine grades), polymer extrusion, paint and coating formulation, and pharmaceutical liquid processing under international metrology standard ISO 80000-4:2019, ASTM D445.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-4:2019, ASTM D445 and the BIPM SI Brochure (9th Edition). Governed by Newton's Law of Viscosity (τ = μ · du/dy) under ISO 80000 dimensional vector [M L⁻¹ T⁻¹].

Multi-Variable Engineering Bridge Rheology & Fluid Boundary Layers

Dynamic to Kinematic Viscosity Bridge (m²/s • cSt • Stokes • ft²/s • in²/s • mm²/s)

Calculate fluid kinematic momentum diffusivity ν = μ / ρ across process liquids, bridging dynamic viscosity [M L⁻¹ T⁻¹] and kinematic viscosity [L² T⁻¹] via metrological density (ρ).

Input Dynamic (Absolute) Viscosity (μ): reyn

Select Fluid Density: 885 kg/m³

Governing Law: ν = μ / ρ

Vector: [Pa·s] ÷ [kg/m³] → [m²/s]

Live Calculated Bridge Equivalent:

1 reyn at Engine Lubricating Oil (SAE 30, 20°C) = 7.790686 m²/s

Equals 7790685.8757 cSt • 77906.8588 St • 83.8582 ft²/s

SI Kinematic Viscosity

7.790686

m²/s

Square Meters per Second

Lubricant ISO VG

7790685.8757

cSt

Centistokes

CGS Viscosity

77906.8588

Stokes

US Customary

83.8582

ft²/s

Square Feet per Second

Aero Hydraulics

12075.59

in²/s

Square Inches per Second

ISO Viscosity

7790685.8757

mm²/s

Square Millimeters per Second

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (Pa·s):
μ = 1 reyn × 6894.757 = 6894.757 Pa·s
2. Apply Engineering Parameter (ρ):
Selected condition: Engine Lubricating Oil (SAE 30, 20°C) at ρ = 885 kg/m³
3. Execute Governing Physical Law in SI Units:
ν = μ / ρ = (6894.757 Pa·s) ÷ (885 kg/m³) = 7.790686 m²/s
4. Convert to Standard Engineering Units:
• m²/s: 7.790686 × 1 = 7.790686 m²/s (Square Meters per Second) • cSt: 7.790686 × 1000000 = 7790685.8757 cSt (Centistokes) • St: 7.790686 × 10000 = 77906.8588 St (Stokes) • ft²/s: 7.790686 × 10.7639 = 83.8582 ft²/s (Square Feet per Second) • in²/s: 7.790686 × 1550.0031 = 12075.59 in²/s (Square Inches per Second) • mm²/s: 7.790686 × 1000000 = 7790685.8757 mm²/s (Square Millimeters per Second)

Explore Full Density Converter →

Engineering Substance / Operating Standard	Parameter Value (kg/m³)	Reference State / Condition	Typical Industrial & Engineering Application
Water (20°C / Standard Ambient)	`998.2`	998.2 kg/m³	Hydronic HVAC & cooling water (NIST)
Engine Lubricating Oil (SAE 30, 20°C)	`885`	885.0 kg/m³	Crankcase lubrication & turbo bearing feeds
Hydraulic Oil (ISO VG 46, 20°C)	`870`	870.0 kg/m³	Industrial hydraulic systems & servo controls
Heavy Fuel Oil (Bunker C / HFO, 50°C)	`920`	920.0 kg/m³	Marine diesel engines & power plant burners
Pure Glycerol (100% C₃H₈O₃, 20°C)	`1260`	1,260.0 kg/m³	High-viscosity metrology reference fluid

Frequently Asked Questions

There are exactly 4633.06279513 pounds/foot/second (lb/(ft·s)) in 1 pound-force second/sq. inch (reyn). To calculate larger amounts manually, simply multiply your total number of pound force seconds/sq. inch by the conversion multiplier of 4633.06279513.

The mathematical formula to convert pound force seconds/sq. inch to pounds/foot/second is: [value] * 4633.06279513 = pounds/foot/second. Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from pounds/foot/second back to pound force seconds/sq. inch, you must divide your starting value by 4633.06279513. Our bidirectional tool automatically computes this inverse equation the moment you type into the pound/foot/second input field.

1 Pound-force second/sq. inch is larger than 1 Pound/foot/second. Specifically, 1 Pound-force second/sq. inch equals exactly 4633.06279513 pounds/foot/second, making it 4633.0628 times larger (a difference of 3.67 orders of magnitude). Therefore, quantities expressed in pounds/foot/second require a larger numerical value to represent the same physical amount.

Under standard international measurement guidelines, 1 Pound-force second/sq. inch converts to 4633.06279513 pounds/foot/second. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.