Convert Cubic Centimeters per Second to Gallons per Minute

Formula

GPM = cm³/s × 0.01585032314149

or GPM = cm³/s ÷ 63.0901964

Derivation from SI units:

• 1 cm³/s = 10⁻⁶ m³ ÷ 1 s
• 1 GPM = 231 in³ ÷ 60 s = 0.003785411784 m³ ÷ 60 s = 6.30901964 × 10⁻⁵ m³/s
• 1 cm³/s = 0.000001 m³/s ÷ 0.0000630901964 m³/s per GPM = 0.01585032314149 GPM

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

Worked examples

1. A reading of 2 cm³/s converts to 0.03170064628 GPM.
   2 cm³/s × 0.01585032314 = 0.03170064628 GPM
2. A value of 50 cm³/s is 0.7925161571 GPM.
   50 cm³/s × 0.01585032314 = 0.7925161571 GPM

Where it's used

Cubic Centimeters per Second are used for air permeability testers that report flow before dividing by area, 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 Second 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 with SI prefix centi.
• 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.