Convert gram-force [gf] to ton-force (long) [tonf (UK)] Online | Free force Converter

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Gram-Force [gf]


The gram-force (gf) is a unit of force based on the force exerted by one gram of mass under standard gravity.



  • It is defined as the force exerted by a mass of 1 gram under the acceleration due to gravity (9.80665 m/s²).



  • Mathematically:



1 gf=1 g×9.80665 m/s2=9.80665×10−3 N=0.00980665 N1 \text{ gf} = 1 \text{ g} \times 9.80665 \text{ m/s}^2 = 9.80665 \times 10^{-3} \text{ N} = 0.00980665 \text{ N}

  • Although not an SI unit, gram-force is used in some fields like engineering and material science for small force measurements.



Example: The force due to a 500 g mass is 500 gf, which is approximately 4.9 newtons.



Ton-Force (Long) [tonf (UK)]


The long ton-force (also called the UK ton-force) is a unit of force based on the long ton, traditionally used in the United Kingdom.



  • A long ton equals 2,240 pounds (lbs).



  • The long ton-force is the force exerted by a long ton mass under standard gravity.



  • Mathematically:



1 tonf (UK)=2,240 lbs×9.80665 m/s2≈9,964.02 newtons1 \text{ tonf (UK)} = 2,240 \text{ lbs} \times 9.80665 \text{ m/s}^2 \approx 9,964.02 \text{ newtons}

  • It is used in engineering and industries where the long ton is the standard measure of mass.



  • This unit is larger than the short ton-force and differs from the metric ton-force.



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