Convert Kilograms per hour to Kilograms per second
Instantly convert Kilograms per hour (kg/hr) to Kilograms per second (kg/s) with our free online calculator.
Formula: kg/hr to kg/s — multiply by 2.7778e-4
Reference Table
| Kilograms per hour (kg/hr) | Kilograms per second (kg/s) |
|---|---|
| 1 | 0.000277778 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 100 | 0.0277778 |
How to Convert Kilograms per hour to Kilograms per second
Formula
To convert Kilograms per hour (kg/hr) to Kilograms per second (kg/s): multiply by 2.7778e-4
Step-by-Step
- Start with your value in Kilograms per hour (kg/hr).
- Multiply by 2.7778e-4 to perform the conversion.
- The result is your value expressed in Kilograms per second (kg/s).
Conversion Factor
1 kg/hr = 0.000277778 kg/s
Reverse Factor
1 kg/s = 3600 kg/hr
Worked Example
Convert 25 Kilograms per hour to Kilograms per second: 25 kg/hr = 0.00694444 kg/s
About Kilogram per hour (kg/hr)
A metric mass-flow unit equal to exactly 1/3600 kg/s. kg/hr is the working unit for industrial process streams, boiler steam-output ratings (DIN EN 12952 water-tube boiler specs and EN 12953 shell-boiler specs are typically quoted in kg/hr or t/hr), petroleum refinery throughput, chemical-plant material balances (Aspen HYSYS, CHEMCAD, AVEVA SimCentral, gPROMS default unit for material-stream rates), bulk material handling, food and beverage manufacturing (production-line throughput per Codex Alimentarius), and HVAC make-up-water rates in commercial humidification systems. Reference values: a typical industrial steam boiler produces 5,000-50,000 kg/hr of saturated steam; a refinery atmospheric-crude distillation column processes 50,000-500,000 kg/hr of feed; a 100 MW gas-turbine combined-cycle gas-flow ~360,000 kg/hr air; a craft brewery's wort kettle 500-5,000 kg/hr; an espresso machine steam wand ~15 kg/hr of vapour. Convert kg/hr to lb/hr by multiplying by 2.2046; to t/hr by dividing by 1,000; to kg/s by dividing by 3,600.
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 Kilogram per hour equals 0.000277778 Kilograms per second
- 1 Kilogram per second equals 3600 Kilograms per hour
- Kilogram 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 Kilogram per hour belongs to the metric system
Common Kilogram per hour to Kilogram per second Conversions
| Kilograms per hour (kg/hr) | Kilograms per second (kg/s) |
|---|---|
| 0.01 | 0.00000277778 |
| 0.1 | 0.0000277778 |
| 0.25 | 0.0000694444 |
| 0.5 | 0.000138889 |
| 1 | 0.000277778 |
| 2 | 0.000555556 |
| 3 | 0.000833333 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 15 | 0.00416667 |
| 20 | 0.00555556 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 75 | 0.0208333 |
| 100 | 0.0277778 |
| 250 | 0.0694444 |
| 500 | 0.138889 |
| 1000 | 0.277778 |
| 5000 | 1.38889 |
| 10000 | 2.77778 |
Understanding Kilograms per hour
The Kilogram per hour (symbol: kg/hr) is a unit of mass flow rate. A metric mass-flow unit equal to exactly 1/3600 kg/s. kg/hr is the working unit for industrial process streams, boiler steam-output ratings (DIN EN 12952 water-tube boiler specs and EN 12953 shell-boiler specs are typically quoted in kg/hr or t/hr), petroleum refinery throughput, chemical-plant material balances (Aspen HYSYS, CHEMCAD, AVEVA SimCentral, gPROMS default unit for material-stream rates), bulk material handling, food and beverage manufacturing (production-line throughput per Codex Alimentarius), and HVAC make-up-water rates in commercial humidification systems. Reference values: a typical industrial steam boiler produces 5,000-50,000 kg/hr of saturated steam; a refinery atmospheric-crude distillation column processes 50,000-500,000 kg/hr of feed; a 100 MW gas-turbine combined-cycle gas-flow ~360,000 kg/hr air; a craft brewery's wort kettle 500-5,000 kg/hr; an espresso machine steam wand ~15 kg/hr of vapour. Convert kg/hr to lb/hr by multiplying by 2.2046; to t/hr by dividing by 1,000; to kg/s by dividing by 3,600.
It belongs to the metric measurement system.
Kilograms 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 Kilograms per hour to Kilograms per second?
Converting between Kilograms 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 Kilograms per hour to Kilograms per second?
A metric mass-flow unit equal to exactly 1/3600 kg/s. To convert Kilograms per hour to Kilograms per second, multiply by 2.7778e-4. For example, 25 kg/hr equals 0.00694444 kg/s.
How many Kilograms per second are in 1 Kilogram per hour?
There are 0.000277778 Kilograms per second in 1 Kilogram per hour.
How many Kilograms per hour are in 1 Kilogram per second?
There are 3600 Kilograms per hour in 1 Kilogram per second.
What is the formula for Kilogram per hour to Kilogram per second conversion?
The formula is: multiply by 2.7778e-4. This means 1 kg/hr = 0.000277778 kg/s.
Is a Kilogram per hour bigger than a Kilogram per second?
Yes. One Kilogram per hour is larger than one Kilogram per second because 1 kg/hr equals 0.000277778 kg/s, which is less than 1.
When do you need to convert between Kilograms 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. Kilogram 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.