Kinematic Viscosity Conversion Diagram

Reference data and engineering information about kinematic viscosity conversion diagram for fluid mechanics applications.

kinematicviscosityconversiondiagramCalculatorData Table

Overview

Engineering reference data for Kinematic Viscosity Conversion Diagram in fluid mechanics.

Key Formulas

Reynolds Number

$Re = \frac{\rho v D}{\mu}$

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

$P + \frac{1}{2}\rho v^2 + \rho g h = \text{const}$

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

$A_1 v_1 = A_2 v_2$

Conservation of mass for incompressible flow.

Darcy-Weisbach

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Pressure drop due to friction in a pipe.

Symbol	Description	Unit
$Re$	Reynolds number	—
$\rho$	Fluid density	kg/m³
$v$	Flow velocity	m/s
$D$	Characteristic dimension	m
$\mu$	Dynamic viscosity	Pa·s
$P$	Pressure	Pa
$f$	Darcy friction factor	—

Table 1: Kinematic Viscosity Conversion Data (Values valid at 50°C / 122°F)
Centistokes (cSt)(mm²/s)	Redwood Seconds(s)	Saybolt SUS(s)	Engler Degrees(-)
2	30.8	32.6	1.12
2.3	31.5	33.7	1.15
2.6	32.3	34.8	1.18
2.9	33	35.7	1.21
3.2	33.8	36.7	1.24
3.5	34.5	37.7	1.26
3.8	35.3	38.6	1.29
4.5	37	40.8	1.35
6	40.9	45.6	1.48
7.5	44.9	50.4	1.61
9	49	55.5	1.75
11	54.9	62.4	1.93
14	64.5	73.5	2.22
17	74.8	85.2	2.54
20	85.7	97.6	2.87
23	97	110	3.22
26	109	123	3.58
29	120	137	3.95
32	132	150	4.32
35	144	163	4.7
38	156	177	5.08
41	168	191	5.47
44	180	204	5.85
47	192	218	6.24
50	204	232	6.62
65	265	301	8.55
80	326	370	10.5
95	387	440	12.5
100	407	463	13.2

The conversion values provided in the table are empirical. They are specified as valid for a temperature of 50°C (122°F). For engineering purposes, this data can be used for approximate calculations across a broader temperature range of 20°C (68°F) to 100°C (212°F).

Important Consideration: Kinematic viscosity is highly temperature-dependent. While these conversions are useful for comparison and estimation, for precise applications, always ensure that viscosity measurements and conversions are performed or referenced at the specific temperature of your process or system.

Kinematic Viscosity Conversion Diagram

Overview

Key Formulas

Reynolds Number

Bernoulli's Equation

Continuity Equation

Darcy-Weisbach

Variables

Data Notes & Application

Interactive Charts

kinematic viscosity centistokes saybolt redwood conversion diagram

References