ONE FORMULA, ONE ANSWER
Mass Flow Rate Calculator
Convert volumetric flow to mass flow for gas supply and material balances. Choose input units and calculate one value within the stated conditions.
Inputs
Calculations run in this browser. Scientific notation such as 1.2e-3 is supported. Do not group thousands.
Result
Mass flow rate ṁ
Enter values and select Calculate.
ṁ = ρ Q
Assumptions
Use ρ>0. Do not combine a standard-condition gas flow rate with an actual-condition density. The cross-section must admit a representative mean density and flow rate.
Displayed values are floating-point approximations. Measurement uncertainty and design safety factors are not calculated.
Formula references and credits
NaNa Lab created the code, descriptions, icons and preview images. Text, figures and code from the linked references have not been reproduced.
Physical constants: NIST / CODATA 2022. The values of μ₀ and ε₀ are measured recommendations, not exact defining constants. Values and precision notes are in the source record.
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