Pounds/hour square foot to Pounds/second square foot Converter (lb/(h·ft²) to lb/(s·ft²))

Rate this converter

Instant calculation with 0ms overhead

Popular Converters

Live Conversion • ISO 80000-9:2019 Certified

1 Pound/hour square foot = 0.00027777773 Pound/second square foot

1 lb/(h·ft²) = 0.000277778 lb/(s·ft²) • 1 lb/(s·ft²) = 3600.000684 lb/(h·ft²)

Decimals:

Certified Authority Value

0.00027778

lb/(s·ft²)

From / Input

lb/(h·ft²)

Swap to Pound/second square foot to Pound/hour square foot

To / Result

lb/(s·ft²)

Quick Values:

Conversion Formula

To convert Pound/hour square foot to Pound/second square foot, multiply by 0.00027777773

lb/(h·ft²) × 0.00027777773 = lb/(s·ft²)

Calculation: 1 lb/(h·ft²) × 0.00027777773 = 0.00027777773 lb/(s·ft²)

Common Pound/hour square foot to Pound/second square foot Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Pound/hour square foot (lb/(h·ft²)) and Pound/second square foot (lb/(s·ft²)).

Tap any row to calculate

Pound/hour square foot to Pound/second square foot: Primary Direct Table (15 Steps)

Rule: 1 Pound/hour square foot is equal to 0.000277778 lb/(s·ft²) (Pound/second square foot)

Pound/hour square foot to Pound/second square foot Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 lb/(h·ft²) 2.777777 × 10⁻⁷ lb/(s·ft²)	2.778 × 10⁻⁷
0.01 lb/(h·ft²) 2.777777 × 10⁻⁶ lb/(s·ft²)	2.778 × 10⁻⁶
0.1 lb/(h·ft²) 2.777777 × 10⁻⁵ lb/(s·ft²)	2.778 × 10⁻⁵
0.5 lb/(h·ft²) 0.000138889 lb/(s·ft²)	1.389 × 10⁻⁴
1 lb/(h·ft²) 0.000277778 lb/(s·ft²)	2.778 × 10⁻⁴
2 lb/(h·ft²) 0.000555555 lb/(s·ft²)	5.556 × 10⁻⁴
5 lb/(h·ft²) 0.00138889 lb/(s·ft²)	1.389 × 10⁻³
10 lb/(h·ft²) 0.00277778 lb/(s·ft²)	2.778 × 10⁻³
20 lb/(h·ft²) 0.00555555 lb/(s·ft²)	5.556 × 10⁻³
25 lb/(h·ft²) 0.00694444 lb/(s·ft²)	6.944 × 10⁻³
50 lb/(h·ft²) 0.0138889 lb/(s·ft²)	1.389 × 10⁻²
100 lb/(h·ft²) 0.0277778 lb/(s·ft²)	2.778 × 10⁻²
250 lb/(h·ft²) 0.0694444 lb/(s·ft²)	6.944 × 10⁻²
500 lb/(h·ft²) 0.138889 lb/(s·ft²)	1.389 × 10⁻¹
1000 lb/(h·ft²) 0.277778 lb/(s·ft²)	2.778 × 10⁻¹

Pound/second square foot to Pound/hour square foot: Reciprocal Summary

Rule: 1 Pound/second square foot is equal to 3600.000684 lb/(h·ft²) (Pound/hour square foot)

Pound/second square foot to Pound/hour square foot Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 lb/(s·ft²) 3600.000684 lb/(h·ft²)	3.6 × 10³
5 lb/(s·ft²) 18000.003418 lb/(h·ft²)	1.8 × 10⁴
10 lb/(s·ft²) 36000.006835 lb/(h·ft²)	3.6 × 10⁴
50 lb/(s·ft²) 180000.034177 lb/(h·ft²)	1.8 × 10⁵
100 lb/(s·ft²) 360000.068354 lb/(h·ft²)	3.6 × 10⁵

View Complete 15-Row Pound/second square foot to Pound/hour square foot Table

Real-World Context & Everyday Benchmarks

Tap to load into converter

To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Pound/hour square foot (lb/(h·ft²)) and Pound/second square foot (lb/(s·ft²)):

Pound/hour square foot References:

Architectural exterior wall vapor barrier moisture transmission 0.5 lb/(h·ft²)
Commercial bakery conveyor bread oven moisture baking loss 3 lb/(h·ft²)

Pound/second square foot References:

Blast furnace air blast tuyere nozzle mass injection flux 10 lb/(s·ft²)

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

ISQ Dimension: [M L⁻² T⁻¹] Coherent SI Unit: kilogram per second square meter (kg/(s·m²)) Fluid Dynamics & Rheology

How to Convert Pound/hour square foot to Pound/second square foot

Converting Pound/hour square foot (lb/(h·ft²)) to Pound/second square foot (lb/(s·ft²)) is a core calculation in Mass Flux Density, which measures the mass flow rate of a substance moving across a unit surface area per unit time. 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/hour square foot equals 0.000277778 Pound/second square foot, while 1 lb/(s·ft²) equals 3600.000684 lb/(h·ft²).

Direct Factor1 lb/(h·ft²) = 0.000277778 lb/(s·ft²)

Inverse Ratio1 lb/(s·ft²) = 3600.000684 lb/(h·ft²)

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 (kilogram per second square meter (kg/(s·m²))) 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 lb/(h·ft²) = 0.00135623 kilogram per second square meter (kg/(s·m²))

2. Target SI Bridge (k_target):1 lb/(s·ft²) = 4.882429 kilogram per second square meter (kg/(s·m²))

Step-by-step substitution for Pound/hour square foot → Pound/second square foot:V(lb/(s·ft²)) = V(lb/(h·ft²)) × ( 0.00135623 / 4.882429 ) = V(lb/(h·ft²)) × 0.000277778

Mathematical FormulaValue in Pound/second square foot = Value in Pound/hour square foot × 0.00027777773Direct computational formula applied for standard conversion.

Worked Example

Evaluating an input of 120 Pound/hour square foot (lb/(h·ft²)) produces 0.0333333 Pound/second square foot (lb/(s·ft²)). In heavy-duty utility and industrial workloads, 100 lb/(h·ft²) equals 0.0277778 lb/(s·ft²).

Inverse check: 1 lb/(s·ft²) = 3600.000684 lb/(h·ft²).

Understanding Pound/hour square foot and Pound/second square foot

Domain Metrology & Engineering Applications

Governing Law & Equation

Fick's First Law of Mass Diffusion (j = -D · ∇c)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using transpirational psychrometric balances, micro-evaporation flux chambers, and quartz crystal microbalances (QCM).

Primary Industry Sectors

Applied across desalination reverse osmosis membrane filtration, industrial spray drying towers, cooling tower drift analysis, and pharmaceutical drying beds under international metrology standard ISO 80000-9:2019.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-9:2019 and the BIPM SI Brochure (9th Edition). Governed by Fick's First Law of Mass Diffusion (j = -D · ∇c) under ISO 80000 dimensional vector [M L⁻² T⁻¹].

Multi-Variable Engineering Bridge Transport Phenomena & Conduit Flow

Mass Flux Density to Total Flow Bridge (kg/s • kg/h • lb/s • lb/h)

Calculate total conduit mass throughput ṁ = G × A across standard nominal pipe cross-sectional flow areas, bridging mass flux density [M L⁻² T⁻¹] with total mass flow [M T⁻¹].

Input Mass Flux Density (G): lb/(h·ft²)

Select Conduit Flow Area: 0.002 m²

Governing Law: ṁ = G × A

Vector: [kg/(s·m²)] × [m²] → [kg/s]

Live Calculated Bridge Equivalent:

1 lb/(h·ft²) at DN50 2-Inch Pipe Bore (0.001963 m²) = 2.663 × 10⁻⁶ kg/s

Equals 0.009587 kg/h • 5.8708 × 10⁻⁶ lb/s • 0.021 lb/h

SI Mass Flow

2.663 × 10⁻⁶

kg/s

Kilograms per Second

Industrial Process

0.009587

kg/h

Kilograms per Hour

US Mass Flow

5.8708 × 10⁻⁶

lb/s

Pounds per Second

Boiler / Turbine Rating

0.021

lb/h

Pounds per Hour

Heavy Plant Header

9.5866 × 10⁻⁶

t/h

Metric Tons per Hour

Chemical / Laboratory

0.002663

g/s

Grams per Second

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (kg/(s·m²)):
G = 1 lb/(h·ft²) × 0.00135623 = 0.00135623 kg/(s·m²)
2. Apply Engineering Parameter (A):
Selected condition: DN50 2-Inch Pipe Bore (0.001963 m²) at A = 0.001964 m²
3. Execute Governing Physical Law in SI Units:
ṁ = G × A = (0.00135623 kg/(s·m²)) × (0.001964 m²) = 2.662957 × 10⁻⁶ kg/s
4. Convert to Standard Engineering Units:
• kg/s: 2.662957 × 10⁻⁶ × 1 = 2.663 × 10⁻⁶ kg/s (Kilograms per Second) • kg/h: 2.662957 × 10⁻⁶ × 3600 = 0.009587 kg/h (Kilograms per Hour) • lb/s: 2.662957 × 10⁻⁶ × 2.2046 = 5.8708 × 10⁻⁶ lb/s (Pounds per Second) • lb/h: 2.662957 × 10⁻⁶ × 7936.6414 = 0.021 lb/h (Pounds per Hour) • t/h: 2.662957 × 10⁻⁶ × 3.6 = 9.5866 × 10⁻⁶ t/h (Metric Tons per Hour) • g/s: 2.662957 × 10⁻⁶ × 1000 = 0.002663 g/s (Grams per Second)

Explore Full Area Converter →

Engineering Substance / Operating Standard	Parameter Value (m²)	Reference State / Condition	Typical Industrial & Engineering Application
DN25 1-Inch Pipe Bore (0.000491 m²)	`0.0004909`	0.000491 m²	Standard domestic plumbing & chemical line
DN50 2-Inch Pipe Bore (0.001963 m²)	`0.001964`	0.001963 m²	Commercial hydronic heating feeder line
DN100 4-Inch Pipe Bore (0.007854 m²)	`0.007854`	0.007854 m²	Industrial plant process & drainage header
DN200 8-Inch Pipe Bore (0.031416 m²)	`0.03142`	0.031416 m²	Municipal water feeder & steam supply line
DN400 16-Inch Main Header (0.12566 m²)	`0.1257`	0.12566 m²	High-volume refinery & cooling tower header

Frequently Asked Questions

There are exactly 0.00027777773 pounds/second square foot (lb/(s·ft²)) in 1 pound/hour square foot (lb/(h·ft²)). To calculate larger amounts manually, simply multiply your total number of pounds/hour square foot by the conversion multiplier of 0.00027777773.

The mathematical formula to convert pounds/hour square foot to pounds/second square foot is: [value] * 0.00027777773 = pounds/second square foot. 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/second square foot back to pounds/hour square foot, you must divide your starting value by 0.00027777773. Our bidirectional tool automatically computes this inverse equation the moment you type into the pound/second square foot input field.

1 Pound/second square foot is larger than 1 Pound/hour square foot. Specifically, 1 Pound/hour square foot equals 0.00027777773 pounds/second square foot, meaning 1 Pound/second square foot is 3600.0007 times larger than 1 Pound/hour square foot (a difference of 3.56 orders of magnitude). Expressing measurements in pounds/hour square foot requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Pound/hour square foot converts to 0.00027777773 pounds/second square foot. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.