Poise to Pound Force Seconds/sq. inch Converter (P to reyn)

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Live Conversion • ISO 80000-4:2019 Certified

1 Poise = 1.45037744 × 10⁻⁵ Pound-force second/sq. inch

1 P = 1.450377 × 10⁻⁵ reyn • 1 reyn = 68947.57 P

Decimals:

Certified Authority Value

0.00001450

reyn

From / Input

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

To / Result

reyn

Quick Values:

Conversion Formula

To convert Poise to Pound-force second/sq. inch, multiply by 1.45037744 × 10⁻⁵

P × 1.45037744 × 10⁻⁵ = reyn

Calculation: 1 P × 1.45037744 × 10⁻⁵ = 1.45037744 × 10⁻⁵ reyn

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

Quick-lookup reference table showing calculated equivalents for standard increments between Poise (P) and Pound-force second/sq. inch (reyn).

Tap any row to calculate

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

Rule: 1 Poise is equal to 1.450377 × 10⁻⁵ reyn (Pound-force second/sq. inch)

Poise to Pound-force second/sq. inch Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 P 1.450377 × 10⁻⁸ reyn	1.45 × 10⁻⁸
0.01 P 1.450377 × 10⁻⁷ reyn	1.45 × 10⁻⁷
0.1 P 1.450377 × 10⁻⁶ reyn	1.45 × 10⁻⁶
0.5 P 7.251887 × 10⁻⁶ reyn	7.252 × 10⁻⁶
1 P 1.450377 × 10⁻⁵ reyn	1.45 × 10⁻⁵
2 P 2.900755 × 10⁻⁵ reyn	2.901 × 10⁻⁵
5 P 7.251887 × 10⁻⁵ reyn	7.252 × 10⁻⁵
10 P 0.000145038 reyn	1.45 × 10⁻⁴
20 P 0.000290075 reyn	2.901 × 10⁻⁴
25 P 0.000362594 reyn	3.626 × 10⁻⁴
50 P 0.000725189 reyn	7.252 × 10⁻⁴
100 P 0.00145038 reyn	1.45 × 10⁻³
250 P 0.00362594 reyn	3.626 × 10⁻³
500 P 0.00725189 reyn	7.252 × 10⁻³
1000 P 0.0145038 reyn	1.45 × 10⁻²

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

Rule: 1 Pound-force second/sq. inch is equal to 68947.57 P (Poise)

Pound-force second/sq. inch to Poise Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 reyn 68947.57 P	6.895 × 10⁴
5 reyn 344737.85 P	3.447 × 10⁵
10 reyn 689475.7 P	6.895 × 10⁵
50 reyn 3447378.5 P	3.447 × 10⁶
100 reyn 6894757 P	6.895 × 10⁶

View Complete 15-Row Pound-force second/sq. inch to Poise 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 Poise (P) and Pound-force second/sq. inch (reyn):

Poise References:

Pure liquid water dynamic viscosity at room temperature (0.01 P / 1 cP) 0.01 P
Commercial culinary golden pancake syrup dynamic viscosity 25 P

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

Tap any benchmark above to automatically calculate its exact equivalent in Pound-force second/sq. inch.

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

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

Converting Poise (P) to Pound-force second/sq. inch (reyn) is a core calculation in Dynamic Viscosity, which quantifies a fluid's internal tangential resistance to shear deformation and laminar flow. This calculation bridges modern MKSA metric standards with the historical Gaussian centimetre-gram-second (CGS) electrostatic and electromagnetic framework. In CGS systems, electromagnetic units (such as statvolts, abvolts, dynes, ergs, and gauss) are formulated directly from mechanical dimensions, with electrostatic-to-electromagnetic relations tied to the speed of light in vacuum (c ≈ 2.99792458 × 10¹⁰ cm/s). Exactly 1 Poise translates to 1.450377 × 10⁻⁵ Pound-force second/sq. inch (1 reyn = 68947.57 P).

Direct Factor1 P = 1.450377 × 10⁻⁵ reyn

Inverse Ratio1 reyn = 68947.57 P

Conversion ScaleSI to CGS Gaussian / ESU / EMU 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 P = 0.1 pascal second (Pa·s)

2. Target SI Bridge (k_target):1 reyn = 6894.757 pascal second (Pa·s)

Step-by-step substitution for Poise → Pound-force second/sq. inch:V(reyn) = V(P) × ( 0.1 / 6894.757 ) = V(P) × 1.450377 × 10⁻⁵

Mathematical FormulaValue in Pound-force second/sq. inch = Value in Poise × 1.45037744 × 10⁻⁵Direct computational formula applied for standard conversion.

Worked Example

Evaluating an input of 24 Poise (P) produces 0.000348091 Pound-force second/sq. inch (reyn). In heavy-duty utility and industrial workloads, 1000 P equals 0.0145038 reyn.

Inverse check: 1 reyn = 68947.57 P.

Understanding Poise and Pound-force second/sq. inch

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): P

Select Fluid Density: 885 kg/m³

Governing Law: ν = μ / ρ

Vector: [Pa·s] ÷ [kg/m³] → [m²/s]

Live Calculated Bridge Equivalent:

1 P at Engine Lubricating Oil (SAE 30, 20°C) = 0.00011299 m²/s

Equals 112.9944 cSt • 1.1299 St • 0.001216 ft²/s

SI Kinematic Viscosity

0.00011299

m²/s

Square Meters per Second

Lubricant ISO VG

112.9944

cSt

Centistokes

CGS Viscosity

1.1299

Stokes

US Customary

0.001216

ft²/s

Square Feet per Second

Aero Hydraulics

0.18

in²/s

Square Inches per Second

ISO Viscosity

112.9944

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 P × 0.1 = 0.1 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 = (0.1 Pa·s) ÷ (885 kg/m³) = 0.00011299 m²/s
4. Convert to Standard Engineering Units:
• m²/s: 0.00011299 × 1 = 0.00011299 m²/s (Square Meters per Second) • cSt: 0.00011299 × 1000000 = 112.9944 cSt (Centistokes) • St: 0.00011299 × 10000 = 1.1299 St (Stokes) • ft²/s: 0.00011299 × 10.7639 = 0.001216 ft²/s (Square Feet per Second) • in²/s: 0.00011299 × 1550.0031 = 0.18 in²/s (Square Inches per Second) • mm²/s: 0.00011299 × 1000000 = 112.9944 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 1.45037744 × 10⁻⁵ pound force seconds/sq. inch (reyn) in 1 poise (P). To calculate larger amounts manually, simply multiply your total number of poise by the conversion multiplier of 1.45037744 × 10⁻⁵.

The mathematical formula to convert poise to pound force seconds/sq. inch is: [value] * 1.45037744 × 10⁻⁵ = pound force seconds/sq. inch. 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 pound force seconds/sq. inch back to poise, you must divide your starting value by 1.45037744 × 10⁻⁵. Our bidirectional tool automatically computes this inverse equation the moment you type into the pound-force second/sq. inch input field.

1 Pound-force second/sq. inch is larger than 1 Poise. Specifically, 1 Poise equals 1.45037744 × 10⁻⁵ pound force seconds/sq. inch, meaning 1 Pound-force second/sq. inch is 68947.57 times larger than 1 Poise (a difference of 4.84 orders of magnitude). Expressing measurements in poise requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Poise converts to 1.45037744 × 10⁻⁵ pound force seconds/sq. inch. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.