m³/hr to kg/hr Calculator
Convert volumetric flow rate in cubic meters per hour (m³/hr) to mass flow rate in kilograms per hour (kg/hr) using fluid density. Supports water, diesel, gasoline, and custom density inputs. Free, fast, and technically verified.
m3 hr to kg hr Calculator
How to Use m3 hr to kg hr Calculator
Converting volumetric flow rate values from cubic meters per hour (m³/hr) to mass flow rate in kilograms per hour (kg/hr) is a common requirement in pump system sizing, pipeline analysis, and fluid processing. Since volumetric flow does not account for the weight of the fluid, you must incorporate density. Follow these steps to perform the conversion:
- 11. Enter volumetric flow: Input the flow rate value in cubic meters per hour (m³/hr) into the volumetric flow rate input field.
- 22. Select fluid type: Click the fluid type dropdown menu and choose from standard fluids like water, diesel, gasoline, milk, or sea water.
- 33. Enter density if custom fluid is used: If your specific fluid is not listed, select Custom Density from the dropdown and type its density in kilograms per cubic meter (kg/m³).
- 44. Click Calculate: Press the Calculate button to trigger the mathematical conversion.
- 55. Read the resulting mass flow rate: Review the calculated mass flow rate in kilograms per hour (kg/hr) displayed in the main output card and review the details container.
How to Calculate m3 hr to kg hr
To convert volumetric flow rate to mass flow rate, you multiply the volumetric flow by the density of the fluid. The physical conversion depends directly on temperature and pressure, which dictate the fluid's density. Ensure all units are compatible prior to calculation.
Formula:
Where:
- kg/hr = Mass flow rate in kilograms per hour
- m³/hr = Volumetric flow rate in cubic meters per hour
- density (kg/m³) = Mass density of the fluid in kilograms per cubic meter
Verified Real-Life Scenario 1 (Water)
Consider a pump system circulating freshwater at a volumetric rate of 10 m³/hr. Water has a density of 1000 kg/m³ under standard conditions.
Step-by-step calculations:
Final answer:
A volumetric flow rate of 10 m³/hr of water equals a mass flow rate of 10,000 kg/hr.
Verified Real-Life Scenario 2 (Diesel)
Now consider a fuel pipeline transferring diesel at a rate of 20 m³/hr. Diesel has a density of 850 kg/m³.
Step-by-step calculations:
Final answer:
A volumetric flow rate of 20 m³/hr of diesel equals a mass flow rate of 17,000 kg/hr.
m3 hr to kg hr Chart
This table lists volumetric flow rate conversions from cubic meters per hour (m³/hr) to kilograms per hour (kg/hr) based on freshwater density of 1000 kg/m³. If you are using a different fluid, the mass flow rate will vary based on the specific gravity of that substance.
| Volumetric Flow Rate (m³/hr) | Fluid Density (kg/m³) | Mass Flow Rate (kg/hr) |
|---|---|---|
| 1 m³/hr | 1000 | 1,000 kg/hr |
| 2 m³/hr | 1000 | 2,000 kg/hr |
| 5 m³/hr | 1000 | 5,000 kg/hr |
| 10 m³/hr | 1000 | 10,000 kg/hr |
| 15 m³/hr | 1000 | 15,000 kg/hr |
| 20 m³/hr | 1000 | 20,000 kg/hr |
| 25 m³/hr | 1000 | 25,000 kg/hr |
| 50 m³/hr | 1000 | 50,000 kg/hr |
| 75 m³/hr | 1000 | 75,000 kg/hr |
| 100 m³/hr | 1000 | 100,000 kg/hr |
Note: Volumetric flow conversions to mass flow change proportionally with fluid density. For fluids other than water, multiply the volumetric flow by the fluid's specific density to find the correct mass flow.
Unit Standardization: SI vs. Imperial Sizing in m3/hr to kg/hr
When working with m3/hr to kg/hr calculations, using consistent physical units is vital. Small translation errors between SI Metric units (like millimeters, kilowatts, and meters) and Imperial units (like AWG wire, horsepower, and feet) can lead to serious sizing errors:
| Dimension | SI Metric Unit | Imperial Unit | Conversion Conversion Factor |
|---|---|---|---|
| Power | Kilowatts (kW) | Horsepower (HP) | 1 kW ≈ 1.341 HP |
| Length | Meters (m) | Feet (ft) | 1 m ≈ 3.2808 ft |
| Flow Rate | Cubic meters/hr (m³/h) | Gallons/minute (GPM) | 1 m³/h ≈ 4.403 GPM |
Always perform unit checks before installing physical components for m3/hr to kg/hr to ensure they match equipment specification sheets.
Frequently Asked Questions (FAQs)
To convert volumetric flow (m3/hr) to mass flow (kg/hr), you simply multiply the flow rate by the density of the substance. The formula is: kg/hr = m3/hr × density (in kg/m3). Because density varies by material, temperature, and pressure, knowing the precise fluid characteristics is essential.
For pure water at standard room temperature, the density is approximately 1000 kg/m3. Therefore, to convert m3/hr of water to kg/hr, you multiply by 1000. For instance, a flow rate of 5 m3/hr of water is equal to 5000 kg/hr. Keep in mind that water density changes slightly with temperature.
Density is the crucial link between volume and mass. One cubic meter of air weighs far less than one cubic meter of oil. Without knowing the exact mass per unit volume (density) of the specific fluid you are measuring, it is physically impossible to convert the volumetric m3/hr rate to kg/hr.
Yes, they have a massive impact, especially for gases. Temperature and pressure change the density of a fluid. As gas is heated, it expands and becomes less dense. If you fail to adjust the density value for the actual operating temperature and pressure, your kg/hr calculation will be wrong.
To reverse the process and convert kg/hr back to m3/hr, you divide the mass flow rate by the fluid's density. The formula is: m3/hr = kg/hr ÷ density (in kg/m3). Again, you must ensure that the density value used matches the actual operating conditions of the fluid for an accurate result.