Mass Flux Density Converter

How to Use

1. 1Type a mass flux density value in the input field
2. 2Select your starting unit from the From dropdown - choose from SI / Metric, US Customary, or Industrial / Process
3. 3Select your target unit from the To dropdown - the result appears instantly
4. 4All 18 conversions appear simultaneously, grouped by unit system
5. 5Hover any result row to reveal the copy (📋) and use-as-input (⇅) buttons
6. 6Click the copy icon to copy a value to your clipboard
7. 7Click ⇅ on any row to use that unit and value as the new input for instant reverse conversion
8. 8Use the ⇄ button between From and To to swap both units while updating the value
9. 9Adjust 'Sig. figures' to control result precision (3 to 12 significant digits)
10. 10Toggle 'Sci notation' for very small values such as mg/(m²·h) or very large values such as lb/(in²·s)
11. 11Collapse a group by clicking its header to reduce clutter when you only need one unit system
12. 12Open 'Common conversions & mass transfer reference' at the bottom for a quick-reference table with real-world mass flux values

Features

• 18 mass flux density units across 3 unit systems
• SI / Metric: kg/(m²·s), g/(m²·s), mg/(m²·s), kg/(m²·min), kg/(m²·h), g/(m²·h), g/(cm²·s), g/(cm²·min)
• US Customary: lb/(ft²·s), lb/(ft²·min), lb/(ft²·h), lb/(in²·s), lb/(in²·h), oz/(ft²·h)
• Industrial / Process: t/(m²·h), kg/(h·ft²), mg/(cm²·s), mg/(m²·h)
• Includes kg/(m²·s) - the SI base unit used in chemical and process engineering
• Includes lb/(ft²·h) - the dominant unit in North American chemical engineering practice
• Includes kg/(m²·h) - standard unit for membrane and filtration flux reporting
• All 18 conversions shown simultaneously - no need to select a single target unit
• Click any result row to use it as the new input for instant reverse conversion
• Adjustable significant figures: 3, 4, 5, 6, 8, 10, or 12 digits
• Toggleable scientific notation for very small or very large values
• Collapsible unit-system groups to reduce visual clutter
• One-click copy to clipboard for any converted value
• Quick-reference table with 12 entries including typical RO, column, and spray-drying flux values
• Exact factors: 1 lb = 0.45359237 kg (exact), 1 ft² = 0.09290304 m², 1 in² = 6.4516×10⁻⁴ m² (all NIST-traceable)
• Default: 1 kg/(m²·s) → lb/(ft²·h) (most common SI-to-US mass flux conversion)
• 100% browser-based - no server, no data upload

Frequently Asked Questions