Convert Centimeters per Second to Millimeters per Second

Formula

mm/s = cm/s × 10

Derivation from SI units:

• 1 cm/s = 0.01 m ÷ 1 s = 1 cm³/(s·cm²)
• 1 mm/s = 0.001 m ÷ 1 s = 1 L/(m²·s)
• 1 cm/s = 0.01 m/s ÷ 0.001 m/s per mm/s = 10 mm/s

Both units are defined exactly, so the factor is exact. Centimeter per Second definition: centimeter per second; Millimeter per Second definition: millimeter per second.

Worked examples

1. A reading of 2.5 cm/s converts to 25 mm/s.
   2.5 cm/s × 10 = 25 mm/s
2. A value of 14 cm/s is 140 mm/s.
   14 cm/s × 10 = 140 mm/s

Where it's used

Centimeters per Second are used for filter media testing (5.33 cm/s = 32 L/min through 100 cm²), while millimeters per second appear in air permeability of fabrics, nonwovens and papers (ISO 9237, EN ISO 9237). Both measure face velocity and air permeability (volumetric flow per unit area), so the conversion is a fixed factor.

Centimeter per Second to other face velocity & air permeability 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.
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2 with SI prefix milli.
• ISO 9237:1995 Textiles — Determination of the permeability of fabrics to air, International Organization for Standardization , results expressed in mm/s.

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