Convert Cubic Centimeters per Minute to Gallons per Minute

Formula

GPM = cm³/min × 0.0002641720523581

or GPM = cm³/min ÷ 3785.411784

Derivation from SI units:

• 1 cm³/min = 10⁻⁶ m³ ÷ 60 s
• 1 GPM = 231 in³ ÷ 60 s = 0.003785411784 m³ ÷ 60 s = 6.30901964 × 10⁻⁵ m³/s
• 1 cm³/min = 1.666666666667 × 10⁻⁸ m³/s ÷ 0.0000630901964 m³/s per GPM = 0.0002641720523581 GPM

Both units are defined exactly, so the factor is exact. Cubic Centimeter per Minute definition: cubic centimeter per minute; Gallon per Minute definition: US gallon per minute.

Worked examples

1. A reading of 5 cm³/min converts to 0.001320860262 GPM.
   5 cm³/min × 0.0002641720524 = 0.001320860262 GPM
2. A value of 200 cm³/min is 0.05283441047 GPM.
   200 cm³/min × 0.0002641720524 = 0.05283441047 GPM

Where it's used

Cubic Centimeters per Minute are used for chromatography carrier-gas and HPLC flows, while US gallons per minute appear in pump, well and irrigation ratings. Both measure volumetric flow rate (volume per unit time), so the conversion is a fixed factor.

Cubic Centimeter per Minute to other flow rate units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2 and Table 8 (minute).
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "gallon [U.S.] per minute (gpm)".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.