Convert Square Millimeters per Second to cm²/s

Formula

cm²/s = mm²/s ÷ 100

Derivation from SI units:

• 1 mm²/s = 10⁻⁶ m²/s = 1 cSt
• 1 cm²/s = 10⁻⁴ m²/s = 1 St
• 1 mm²/s = 0.000001 m²/s ÷ 0.0001 m²/s per cm²/s = 0.01 cm²/s

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

Worked examples

1. A reading of 32 mm²/s converts to 0.32 cm²/s.
   32 mm²/s × 0.01 = 0.32 cm²/s
2. A value of 220 mm²/s is 2.2 cm²/s.
   220 mm²/s × 0.01 = 2.2 cm²/s

Where it's used

Square Millimeters per Second are used for lubricant ISO VG grades (VG 32, 46, 68 …), while square centimeters per second appear in diffusion coefficients (gases in air ≈ 0.1–0.2 cm²/s). Both measure kinematic viscosity (dynamic viscosity divided by density), so the conversion is a fixed factor.

Square Millimeter per Second to other kinematic viscosity 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 milli.
• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2 with SI prefix centi.

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