Viscosity Converter — Kinematic, Dynamic & SSU | Engineering Calc Pro

💧 Viscosity Converter

Kinematic (cSt), Dynamic (cP), and SSU/SUS conversions

Enter a value in any field — others calculate automatically. Requires fluid density for kinematic ↔ dynamic conversion.

Kinematic Viscosity (cSt = mm²/s)

Dynamic Viscosity (cP = mPa·s)

SSU / SUS (Saybolt Universal)

Pa·s (Pascal-seconds)

Fluid Density (kg/m³) — for cSt ↔ cP conversion

Fluid	cSt	cP (approx)	ISO Grade / SSU
Water (20°C)	1.0	1.0	—
Diesel Fuel	3–5	2.6–4.3	—
Hydraulic Oil ISO VG 32	32	27.5	ISO 32 / ~150 SSU
Hydraulic Oil ISO VG 46	46	39.6	ISO 46 / ~215 SSU
Hydraulic Oil ISO VG 68	68	58.5	ISO 68 / ~315 SSU
Gear Oil ISO VG 100	100	86	ISO 100 / ~465 SSU
Gear Oil ISO VG 220	220	189	ISO 220 / ~1020 SSU
SAE 10W-30 Motor Oil	65–75	56–65	—
SAE 5W-40 Motor Oil	85–110	73–95	—
Glycerine (100%)	1,490	1,490	—

cP = cSt × ρ (g/cm³) | Pa·s = cP / 1000

SSU to cSt: cSt = 0.226×SSU − 195/SSU (SSU < 100) | cSt = 0.220×SSU − 135/SSU (SSU ≥ 100)