Calculator · Statistics
Carr's index & Hausner ratio
Powder flow indicators from bulk and tapped density.
Result
Carr's (compressibility) index
18.4%
Hausner ratio
1.23
Flow character (USP <1174> scale)
Fair
Bulk / tapped density
0.400 / 0.490g/mL
Carr's index = (ρtapped − ρbulk) ÷ ρtapped × 100; Hausner ratio = ρtapped ÷ ρbulk
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Calculators are for learning and quick checks. Use your validated spreadsheet or LIMS for reportable results.