Convert Square Millimeters per Second to Centistokes

Formula

cSt = mm²/s × 1

Derivation from SI units:

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

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

Worked examples

1. An ISO VG 32 oil at 32 mm²/s (40 °C) is 32 cSt.
   32 mm²/s × 1 = 32 cSt
2. Diesel at about 2.5 mm²/s is 2.5 cSt.
   2.5 mm²/s × 1 = 2.5 cSt

Where it's used

SI kinematic viscosities in mm²/s are read directly as centistokes for older datasheets and US references.

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.
• 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, "centistokes (cSt)".

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