Pound/Foot-Second to Pound-force Second/sq Foot Converter

Dynamic Viscosity Converter

8 units available

Decimals:

From

To

0.031081

1 lb/(ft·s) = 0.031081 lbf·s/ft²

Formula:

lbf·s/ft² = lb/(ft·s) × 0.0310809492

With your value: 1 lb/(ft·s) = 0.03108095 lbf·s/ft²

Other Pound/Foot-Second to Pound-force Second/sq Foot conversions

2 lb/(ft·s) to lbf·s/ft² 3 lb/(ft·s) to lbf·s/ft² 4 lb/(ft·s) to lbf·s/ft² 5 lb/(ft·s) to lbf·s/ft² 6 lb/(ft·s) to lbf·s/ft² 7 lb/(ft·s) to lbf·s/ft² 8 lb/(ft·s) to lbf·s/ft²

Pound/Foot-Second to Pound-force Second/sq Foot Conversion Table

Pound/Foot-Second (lb/(ft·s))	Pound-force Second/sq Foot (lbf·s/ft²)
0.5	0.01554
1	0.031081
2	0.062162
5	0.155405
10	0.310809
15	0.466214
20	0.621619
25	0.777024
50	1.554047
100	3.108095
250	7.770237
500	15.540475
1000	31.080949

Pound-force Second/sq Foot to Pound/Foot-Second Conversion Table

Pound-force Second/sq Foot (lbf·s/ft²)	Pound/Foot-Second (lb/(ft·s))
0.5	16.087025
1	32.17405
2	64.348099
5	160.870248
10	321.740495
15	482.610743
20	643.48099
25	804.351238
50	1,608.702476
100	3,217.404951
250	8,043.512378
500	16,087.024756
1000	32,174.049512

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.

Pound/Foot-Second (lb/(ft·s))

Dynamic Viscosity

Exact conversion

Derived quantity, pascal-second (Pa·s = kg/(m·s)). The poise is exactly 0.1 Pa·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

Pound-force Second/sq Foot (lbf·s/ft²)

Dynamic Viscosity

Exact conversion

Derived quantity, pascal-second (Pa·s = kg/(m·s)). The poise is exactly 0.1 Pa·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 Pound/Foot-Second to Pound-force Second/sq Foot

To convert from Pound/Foot-Second (lb/(ft·s)) to Pound-force Second/sq Foot (lbf·s/ft²), multiply the value by 0.0310809492.

Formula: lbf·s/ft² = lb/(ft·s) × 0.0310809492

Reverse: lb/(ft·s) = lbf·s/ft² × 32.1740495116

Step-by-Step Example

Start with your value in Pound/Foot-Second. For example: 5 lb/(ft·s)
Multiply by the conversion factor: 5 x 0.0310809492
The result is: 0.155405 lbf·s/ft²

About Pound/Foot-Second

The pound/foot-second (lb/(ft·s)) is a unit of dynamic viscosity. One pound/foot-second equals 1.4881639 base units. UnitConvertLab converts it against every other dynamic viscosity unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About Pound-force Second/sq Foot

The pound-force second/sq foot (lbf·s/ft²) is a unit of dynamic viscosity. One pound-force second/sq foot equals 47.880259 base units. UnitConvertLab converts it against every other dynamic viscosity unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many Pound-force Second/sq Foot are in 1 Pound/Foot-Second?

There are exactly 0.0310809492 Pound-force Second/sq Foot in 1 Pound/Foot-Second. This means the conversion factor from Pound/Foot-Second to Pound-force Second/sq Foot is 0.0310809492.

What is the formula to convert Pound/Foot-Second to Pound-force Second/sq Foot?

The formula to convert Pound/Foot-Second to Pound-force Second/sq Foot is: lbf·s/ft² = lb/(ft·s) × 0.0310809492. For example, to convert 10 Pound/Foot-Second to Pound-force Second/sq Foot, you would multiply 10 by 0.0310809492.

What is a Pound/Foot-Second?