Square Inch/Second to Stokes Converter

Kinematic Viscosity Converter

6 units available

Decimals:

From

To

6.4516

1 in²/s = 6.4516 St

Formula:

St = in²/s × 6.4516

With your value: 1 in²/s = 6.4516 St

Other Square Inch/Second to Stokes conversions

2 in²/s to St 3 in²/s to St 4 in²/s to St 5 in²/s to St 6 in²/s to St 7 in²/s to St 8 in²/s to St

Square Inch/Second to Stokes Conversion Table

Square Inch/Second (in²/s)	Stokes (St)
0.5	3.2258
1	6.4516
2	12.9032
5	32.258
10	64.516
15	96.774
20	129.032
25	161.29
50	322.58
100	645.16
250	1,612.9
500	3,225.8
1000	6,451.6

Stokes to Square Inch/Second Conversion Table

Stokes (St)	Square Inch/Second (in²/s)
0.5	0.0775
1	0.155
2	0.310001
5	0.775002
10	1.550003
15	2.325005
20	3.100006
25	3.875008
50	7.750016
100	15.500031
250	38.750078
500	77.500155
1000	155.00031

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Square Inch/Second (in²/s)

Kinematic Viscosity

Exact conversion

Derived quantity, square metre per second (m²/s). The stokes is exactly 10⁻⁴ m²/s by CGS definition.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Stokes (St)

Kinematic Viscosity

Exact conversion

Derived quantity, square metre per second (m²/s). The stokes is exactly 10⁻⁴ m²/s by CGS definition.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Square Inch/Second to Stokes

To convert from Square Inch/Second (in²/s) to Stokes (St), multiply the value by 6.4516.

Formula: St = in²/s × 6.4516

Reverse: in²/s = St × 0.15500031

Step-by-Step Example

Start with your value in Square Inch/Second. For example: 5 in²/s
Multiply by the conversion factor: 5 x 6.4516
The result is: 32.258 St

About Square Inch/Second

The square inch/second (in²/s) is a unit of kinematic viscosity. One square inch/second equals 0.00064516 base units. UnitConvertLab converts it against every other kinematic viscosity unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: kinematic viscosity calculations, engineering and science, education.

About Stokes

The stokes (St) is a unit of kinematic viscosity. One stokes equals 0.0001 base units. UnitConvertLab converts it against every other kinematic viscosity unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: kinematic viscosity calculations, engineering and science, education.

Frequently Asked Questions

How many Stokes are in 1 Square Inch/Second?

There are exactly 6.4516 Stokes in 1 Square Inch/Second. This means the conversion factor from Square Inch/Second to Stokes is 6.4516.

What is the formula to convert Square Inch/Second to Stokes?

The formula to convert Square Inch/Second to Stokes is: St = in²/s × 6.4516. For example, to convert 10 Square Inch/Second to Stokes, you would multiply 10 by 6.4516.

What is a Square Inch/Second?