Pounds/hour to Kilograms/second Converter (lb/h to kg/s)

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Live Conversion • ISO 80000-4:2019 Certified

1 Pound/hour = 0.00012599788 Kilogram/second

1 lb/h = 0.000125998 kg/s • 1 kg/s = 7936.64144 lb/h

Decimals:

Certified Authority Value

0.00012600

kg/s

From / Input

lb/h

Swap to Kilogram/second to Pound/hour

To / Result

kg/s

Quick Values:

Conversion Formula

To convert Pound/hour to Kilogram/second, multiply by 0.00012599788

lb/h × 0.00012599788 = kg/s

Calculation: 1 lb/h × 0.00012599788 = 0.00012599788 kg/s

Common Pound/hour to Kilogram/second Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Pound/hour (lb/h) and Kilogram/second (kg/s).

Tap any row to calculate

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

Rule: 1 Pound/hour is equal to 0.000125998 kg/s (Kilogram/second)

Pound/hour to Kilogram/second Conversion Reference Table
Conversion & Equivalent Value	Scientific Notation
0.001 lb/h 1.259979 × 10⁻⁷ kg/s	1.26 × 10⁻⁷
0.01 lb/h 1.259979 × 10⁻⁶ kg/s	1.26 × 10⁻⁶
0.1 lb/h 1.259979 × 10⁻⁵ kg/s	1.26 × 10⁻⁵
0.5 lb/h 6.299894 × 10⁻⁵ kg/s	6.3 × 10⁻⁵
1 lb/h 0.000125998 kg/s	1.26 × 10⁻⁴
2 lb/h 0.000251996 kg/s	2.52 × 10⁻⁴
5 lb/h 0.000629989 kg/s	6.3 × 10⁻⁴
10 lb/h 0.00125998 kg/s	1.26 × 10⁻³
20 lb/h 0.00251996 kg/s	2.52 × 10⁻³
25 lb/h 0.00314995 kg/s	3.15 × 10⁻³
50 lb/h 0.00629989 kg/s	6.3 × 10⁻³
100 lb/h 0.0125998 kg/s	1.26 × 10⁻²
250 lb/h 0.0314995 kg/s	3.15 × 10⁻²
500 lb/h 0.0629989 kg/s	6.3 × 10⁻²
1000 lb/h 0.125998 kg/s	1.26 × 10⁻¹

Kilogram/second to Pound/hour: Reciprocal Summary

Rule: 1 Kilogram/second is equal to 7936.64144 lb/h (Pound/hour)

Kilogram/second to Pound/hour Conversion Reference Table
Reciprocal & Equivalent Value	Scientific Notation
1 kg/s 7936.64144 lb/h	7.937 × 10³
5 kg/s 39683.2072 lb/h	3.968 × 10⁴
10 kg/s 79366.4144 lb/h	7.937 × 10⁴
50 kg/s 396832.072 lb/h	3.968 × 10⁵
100 kg/s 793664.144 lb/h	7.937 × 10⁵

View Complete 15-Row Kilogram/second to Pound/hour 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/hour (lb/h) and Kilogram/second (kg/s):

Pound/hour References:

Residential heating oil furnace fuel consumption at full burner fire 7 lb/h
Commercial boiler steam generation rating standard benchmark 10000 lb/h

Kilogram/second References:

Municipal fire department 2.5-inch hose water discharge rate 20 kg/s
Commercial Boeing 737 passenger airliner cruise fuel consumption 0.7 kg/s
Commercial hydro-electric power plant water penstock flow 150000 kg/s
SpaceX Falcon 9 rocket first-stage propellant burn mass flow 2500 kg/s

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

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

How to Convert Pound/hour to Kilogram/second

Converting Pound/hour (lb/h) to Kilogram/second (kg/s) is a core calculation in Mass Flow Rate, which measures the mass of a substance moving through a cross-sectional area per unit of 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 equals 0.000125998 Kilogram/second, while 1 kg/s equals 7936.64144 lb/h.

Direct Factor1 lb/h = 0.000125998 kg/s

Inverse Ratio1 kg/s = 7936.64144 lb/h

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 (kg/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 lb/h = 0.000125998 kilogram per second (kg/s)

2. Target SI Bridge (k_target):1 kg/s = 1 kilogram per second (kg/s)

Step-by-step substitution for Pound/hour → Kilogram/second:V(kg/s) = V(lb/h) × ( 0.000125998 / 1 ) = V(lb/h) × 0.000125998

Mathematical FormulaValue in Kilogram/second = Value in Pound/hour × 0.00012599788Direct computational formula applied for standard conversion.

Worked Example

Evaluating an input of 2.5 Pound/hour (lb/h) produces 0.000314995 Kilogram/second (kg/s). In heavy-duty utility and industrial workloads, 10000 lb/h equals 1.259979 kg/s.

Inverse check: 1 kg/s = 7936.64144 lb/h.

Understanding Pound/hour and Kilogram/second

Domain Metrology & Engineering Applications

Governing Law & Equation

Mass Conservation in Open Control Volumes (ṁ = ρ · Q)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using Coriolis mass flowmeters, thermal dispersion mass flowmeters, and gravimetric loss-in-weight feeders.

Primary Industry Sectors

Applied across natural gas LNG fiscal metering, compressed natural gas (CNG) dispensing, boiler feedwater tracking, and polymer batch compounding under international metrology standard ISO 80000-4:2019, ASME MFC-11M.

Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-4:2019, ASME MFC-11M and the BIPM SI Brochure (9th Edition). Governed by Mass Conservation in Open Control Volumes (ṁ = ρ · Q) under ISO 80000 dimensional vector [M T⁻¹].

Multi-Variable Engineering Bridge Precision Fluid Continuity

Volumetric Flow & Fluid Continuity Bridge (m³/s • GPM • CFM • m³/h • L/min • L/s)

Directly convert mass flow rate (ṁ) into volumetric flow (Q) across process fluids using the thermodynamic continuity equation Q = ṁ / ρ, bridging mass flow [M T⁻¹] and volumetric flow [L³ T⁻¹] via fluid density (ρ).

Input Mass Flow Rate (ṁ): lb/h

Select Fluid Density: 998.2 kg/m³

Governing Law: Q = ṁ / ρ

Vector: [kg/s] ÷ [kg/m³] → [m³/s]

Live Calculated Bridge Equivalent:

1 lb/h at Water (20°C / Standard Ambient) = 1.2623 × 10⁻⁷ m³/s

Equals 0.002001 GPM • 0.0002675 CFM • 0.0004544 m³/h

SI Volumetric Flow

1.2623 × 10⁻⁷

m³/s

Cubic Meters per Second

US Pump Standard

0.002001

GPM

US Gallons per Minute

Air / Gas Flow

0.0002675

CFM

Cubic Feet per Minute

Metric Flow Rate

0.0004544

m³/h

Cubic Meters per Hour

Hydraulics & Lab

0.007574

L/min

Liters per Minute

Process Piping

0.0001262

L/s

Liters per Second

Step-by-Step Numerical Derivation Proof View Derivation

1. Normalize Input to SI Base Unit (kg/s):
ṁ = 1 lb/h × 0.000126 = 0.000126 kg/s
2. Apply Engineering Parameter (ρ):
Selected condition: Water (20°C / Standard Ambient) at ρ = 998.2 kg/m³
3. Execute Governing Physical Law in SI Units:
Q = ṁ / ρ = (0.000126 kg/s) ÷ (998.2 kg/m³) = 1.262251 × 10⁻⁷ m³/s
4. Convert to Standard Engineering Units:
• m³/s: 1.262251 × 10⁻⁷ × 1 = 1.2623 × 10⁻⁷ m³/s (Cubic Meters per Second) • GPM: 1.262251 × 10⁻⁷ × 15850.3231 = 0.002001 GPM (US Gallons per Minute) • CFM: 1.262251 × 10⁻⁷ × 2118.88 = 0.0002675 CFM (Cubic Feet per Minute) • m³/h: 1.262251 × 10⁻⁷ × 3600 = 0.0004544 m³/h (Cubic Meters per Hour) • L/min: 1.262251 × 10⁻⁷ × 60000 = 0.007574 L/min (Liters per Minute) • L/s: 1.262251 × 10⁻⁷ × 1000 = 0.0001262 L/s (Liters 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)
Saturated Steam (100°C, 1 atm)	`0.5977`	0.5977 kg/m³	Boiler steam piping & relief headers
Air (Standard Ambient / NTP 20°C)	`1.204`	1.204 kg/m³	Compressor SCFM rating & duct air
Diesel Fuel (EN 590 / No. 2-D, 20°C)	`832`	832.0 kg/m³	Engine fuel telemetry & BSFC dyno
Natural Gas / Methane (STP 0°C, 1 atm)	`0.717`	0.717 kg/m³	Gas turbine firing rate & burner supply

Frequently Asked Questions

There are exactly 0.00012599788 kilograms/second (kg/s) in 1 pound/hour (lb/h). To calculate larger amounts manually, simply multiply your total number of pounds/hour by the conversion multiplier of 0.00012599788.

The mathematical formula to convert pounds/hour to kilograms/second is: [value] * 0.00012599788 = kilograms/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 kilograms/second back to pounds/hour, you must divide your starting value by 0.00012599788. Our bidirectional tool automatically computes this inverse equation the moment you type into the kilogram/second input field.

1 Kilogram/second is larger than 1 Pound/hour. Specifically, 1 Pound/hour equals 0.00012599788 kilograms/second, meaning 1 Kilogram/second is 7936.6414 times larger than 1 Pound/hour (a difference of 3.90 orders of magnitude). Expressing measurements in pounds/hour requires a larger numerical value to represent the equivalent physical magnitude.

Under standard international measurement guidelines, 1 Pound/hour converts to 0.00012599788 kilograms/second. Precise numerical conversion factors ensure consistency across laboratory, engineering, and field data.