Convert Square Millimeters per Second to m²/s

Formula

m²/s = mm²/s ÷ 1000000

Derivation from SI units:

• 1 mm²/s = 10⁻⁶ m²/s = 1 cSt
• 1 m²/s = 1 m² ÷ 1 s

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

Worked examples

1. A reading of 32 mm²/s converts to 0.000032 m²/s.
   32 mm²/s × 0.000001 = 0.000032 m²/s
2. A value of 220 mm²/s is 0.00022 m²/s.
   220 mm²/s × 0.000001 = 0.00022 m²/s

Where it's used

Square Millimeters per Second are used for lubricant ISO VG grades (VG 32, 46, 68 …), while square meters per second appear in reynolds-number and pipe-flow calculations (Re = vD/ν). 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, coherent derived units.

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