ton-force (metric) (tf) to pound foot/square second (lb·ft/s²)

ton-force (metric) (tf) to pound foot/square second (lb·ft/s²) conversion guide

ton-force (metric) (tf) to pound foot/square second (lb·ft/s²) expresses the same force in a different unit. The direction matters: a value given in ton-force (metric) (tf) is multiplied by the source-to-target factor to obtain pound foot/square second (lb·ft/s²). Keep the original measurement and its unit together when copying a result into a calculation.

Conversion formula

Value in pound foot/square second (lb·ft/s²) = value in ton-force (metric) (tf) × (175118750000000 / 2468838471). The factor is approximately 70931.63528. Derive it by dividing the source unit value in the base unit by the destination unit value in the same base unit.

About these units

ton-force (metric) (tf): A force unit, not a mass unit. Gravitational force units here use conventional standard gravity of 9.80665 meters per second squared. One source unit equals 9806.65 newton.

pound foot/square second (lb·ft/s²): One poundal is one international avoirdupois pound foot per second squared, equal to 0.138254954376 newtons. It differs from pound-force and does not use standard gravity in its definition. One destination unit equals 0.1382549544 newton.

Worked examples

• 1 ton-force (metric) (tf) = approximately 70931.63528 pound foot/square second (lb·ft/s²)
• 2.5 ton-force (metric) (tf) = approximately 177329.0882 pound foot/square second (lb·ft/s²)
• 10 ton-force (metric) (tf) = approximately 709316.3528 pound foot/square second (lb·ft/s²)

Precision and interpretation

Examples are rounded for display. Keep the unrounded factor for intermediate calculations and round the final answer to match the precision of the original measurement. Extra decimal places do not make a measured quantity more accurate.

Force and mass are different quantities. Check the distinction between pound-force and pound mass, and between metric, short, and long ton-force.

Common questions

How do I reverse this conversion?

Divide the target-unit value by the forward factor, or use the inverse converter. Multiplying by the same factor again is not the inverse operation.

Why can the displayed answer differ slightly?

Display rounding and numerical precision can produce a small difference from an exact fractional calculation. For technical work, retain sufficient precision and confirm the unit convention required by the source.

Related conversions

Force unit converters, Mass and weight converters, Everyday unit converters.