Convert Pounds per hour to Kilograms per second
Instantly convert Pounds per hour (lb/hr) to Kilograms per second (kg/s) with our free online calculator.
Formula: lb/hr to kg/s — multiply by 1.2600e-4
Reference Table
| Pounds per hour (lb/hr) | Kilograms per second (kg/s) |
|---|---|
| 1 | 0.000125998 |
| 5 | 0.00062999 |
| 10 | 0.00125998 |
| 25 | 0.00314995 |
| 50 | 0.0062999 |
| 100 | 0.0125998 |
How to Convert Pounds per hour to Kilograms per second
Formula
To convert Pounds per hour (lb/hr) to Kilograms per second (kg/s): multiply by 1.2600e-4
Step-by-Step
- Start with your value in Pounds per hour (lb/hr).
- Multiply by 1.2600e-4 to perform the conversion.
- The result is your value expressed in Kilograms per second (kg/s).
Conversion Factor
1 lb/hr = 0.000125998 kg/s
Reverse Factor
1 kg/s = 7936.63 lb/hr
Worked Example
Convert 25 Pounds per hour to Kilograms per second: 25 lb/hr = 0.00314995 kg/s
About Pound per hour (lb/hr)
An imperial mass-flow unit (≈ 0.453592 kg/hr = 1.25998 × 10⁻⁴ kg/s). lb/hr is the universal working unit in US HVAC, steam engineering, petroleum refining, and chemical process plants. US boiler ratings are traditionally given in lb/hr of saturated steam output: a 'boiler horsepower' (BHP) is defined as 34.5 lb/hr of saturated steam at 212 °F per ASME PTC 4.1, so a '500 BHP boiler' produces 17,250 lb/hr. ASHRAE Handbook chapters on humidification, central plants, district heating, and refrigeration all use lb/hr. Refinery feed rates appear in lb/hr in older facility documentation (newer plants increasingly use kg/hr internationally and BPD for crude). Fuel consumption on large industrial engines, marine prime movers (with bunker fuel oil), and standby diesels is routinely quoted in lb/hr.
About Kilogram per second (kg/s)
The SI unit of mass flow rate (ISO 80000-4 §4-30) — mass of substance crossing a fixed boundary per unit time. kg/s is the universal unit in chemical, mechanical, and propulsion engineering for process material balances, combustion-stoichiometry analysis (air and fuel flow rates), turbomachinery design (compressor and turbine corrected mass flow), and rocket propulsion. Coriolis mass-flow meters per ASME PTC 19.5 and Micro Motion CMF / Endress+Hauser Promass series industrial transmitters report directly in kg/s. Reference scale: Space Shuttle main engines consumed ~512 kg/s of LH2/LOX propellant each at full thrust (3 × ~1.5 GW power equivalent); the SpaceX Raptor 2 engine ~720 kg/s; a commercial high-bypass turbofan burns ~3 kg/s of Jet A at cruise; a 100 MW gas turbine ~300 kg/s air mass flow. Convert to lb/s by dividing by 0.4536; to kg/hr by multiplying by 3,600; to lb/hr by multiplying by 7,937.
Quick Facts
- 1 Pound per hour equals 0.000125998 Kilograms per second
- 1 Kilogram per second equals 7936.63 Pounds per hour
- Pound per hour is a unit of mass flow rate
- Kilogram per second is a unit of mass flow rate
- This conversion is commonly used in chemical processing, fuel systems, and environmental monitoring
- The Pound per hour belongs to the imperial system
- The Kilogram per second belongs to the metric system
Common Pound per hour to Kilogram per second Conversions
| Pounds per hour (lb/hr) | Kilograms per second (kg/s) |
|---|---|
| 0.01 | 0.00000125998 |
| 0.1 | 0.0000125998 |
| 0.25 | 0.0000314995 |
| 0.5 | 0.000062999 |
| 1 | 0.000125998 |
| 2 | 0.000251996 |
| 3 | 0.000377994 |
| 5 | 0.00062999 |
| 10 | 0.00125998 |
| 15 | 0.00188997 |
| 20 | 0.00251996 |
| 25 | 0.00314995 |
| 50 | 0.0062999 |
| 75 | 0.00944985 |
| 100 | 0.0125998 |
| 250 | 0.0314995 |
| 500 | 0.062999 |
| 1000 | 0.125998 |
| 5000 | 0.62999 |
| 10000 | 1.25998 |
Understanding Pounds per hour
The Pound per hour (symbol: lb/hr) is a unit of mass flow rate. An imperial mass-flow unit (≈ 0.453592 kg/hr = 1.25998 × 10⁻⁴ kg/s). lb/hr is the universal working unit in US HVAC, steam engineering, petroleum refining, and chemical process plants. US boiler ratings are traditionally given in lb/hr of saturated steam output: a 'boiler horsepower' (BHP) is defined as 34.5 lb/hr of saturated steam at 212 °F per ASME PTC 4.1, so a '500 BHP boiler' produces 17,250 lb/hr. ASHRAE Handbook chapters on humidification, central plants, district heating, and refrigeration all use lb/hr. Refinery feed rates appear in lb/hr in older facility documentation (newer plants increasingly use kg/hr internationally and BPD for crude). Fuel consumption on large industrial engines, marine prime movers (with bunker fuel oil), and standby diesels is routinely quoted in lb/hr.
It belongs to the imperial measurement system.
Pounds per hour are commonly used in chemical processing, fuel systems, and environmental monitoring.
Understanding Kilograms per second
The Kilogram per second (symbol: kg/s) is a unit of mass flow rate. The SI unit of mass flow rate (ISO 80000-4 §4-30) — mass of substance crossing a fixed boundary per unit time. kg/s is the universal unit in chemical, mechanical, and propulsion engineering for process material balances, combustion-stoichiometry analysis (air and fuel flow rates), turbomachinery design (compressor and turbine corrected mass flow), and rocket propulsion. Coriolis mass-flow meters per ASME PTC 19.5 and Micro Motion CMF / Endress+Hauser Promass series industrial transmitters report directly in kg/s. Reference scale: Space Shuttle main engines consumed ~512 kg/s of LH2/LOX propellant each at full thrust (3 × ~1.5 GW power equivalent); the SpaceX Raptor 2 engine ~720 kg/s; a commercial high-bypass turbofan burns ~3 kg/s of Jet A at cruise; a 100 MW gas turbine ~300 kg/s air mass flow. Convert to lb/s by dividing by 0.4536; to kg/hr by multiplying by 3,600; to lb/hr by multiplying by 7,937.
It belongs to the metric measurement system.
Kilograms per second are commonly used in chemical processing, fuel systems, and environmental monitoring.
Why Convert Pounds per hour to Kilograms per second?
Converting between Pounds per hour and Kilograms per second is a frequent requirement for engineers, scientists, and students working with mass flow rate 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 mass flow rate conversion is essential.
Frequently Asked Questions
How do I convert Pounds per hour to Kilograms per second?
An imperial mass-flow unit (≈ 0. To convert Pounds per hour to Kilograms per second, multiply by 1.2600e-4. For example, 25 lb/hr equals 0.00314995 kg/s.
How many Kilograms per second are in 1 Pound per hour?
There are 0.000125998 Kilograms per second in 1 Pound per hour.
How many Pounds per hour are in 1 Kilogram per second?
There are 7936.63 Pounds per hour in 1 Kilogram per second.
What is the formula for Pound per hour to Kilogram per second conversion?
The formula is: multiply by 1.2600e-4. This means 1 lb/hr = 0.000125998 kg/s.
Is a Pound per hour bigger than a Kilogram per second?
Yes. One Pound per hour is larger than one Kilogram per second because 1 lb/hr equals 0.000125998 kg/s, which is less than 1.
When do you need to convert between Pounds per hour and Kilograms per second?
The SI unit of mass flow rate (ISO 80000-4 §4-30) — mass of substance crossing a fixed boundary per unit time. Pound per hour and Kilogram per second are both mass flow 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.