1,000
N
1
kN
224.809
lbf
1,000
N
1
kN
224.809
lbf
The Sthenes to Newtons Converter converts force measurements from sthenes (sn) to newtons (N) using the exact conversion 1 sn = 1000 N = 1 kN. The sthene (also spelled sthène) is the unit of force in the metre-tonne-second (MTS) system and is exactly equal to one kilonewton.
The MTS system was introduced in France in 1919 and adopted as the legal system of units in the Soviet Union from 1933 to 1955. It uses the metre for length, the tonne (1000 kg) for mass, and the second for time. The sthene is the coherent force unit: the force that accelerates one tonne at one metre per second squared. Since 1 tonne = 1000 kg and 1 N = 1 kg·m/s², it follows exactly that 1 sn = 1000 N.
While the MTS system is no longer in official use anywhere, sthenes occasionally appear in historical engineering documents from France and the former Soviet Union. The pieze (pz), the MTS unit of pressure (1 pz = 1 sn/m² = 1000 Pa = 1 kPa), also appears in some older literature.
The convenient equivalence 1 sthene = 1 kilonewton makes conversion trivial, but this tool provides the additional convenience of computing newtons and pounds-force simultaneously. Our converter handles any magnitude for users working with historical MTS-system engineering documents.
The formula is trivially: N = sn × 1000. This is exact by definition since 1 sn = 1 t·m/s² = 1000 kg·m/s² = 1000 N = 1 kN. For pounds-force: lbf = sn × 1000 × 0.224809 = sn × 224.809.
Since 1 sthene = 1 kilonewton exactly, interpreting sthene values is straightforward: 1 sn = 1 kN ≈ 225 lbf, roughly the weight of a 100 kg object. Typical applications in the old MTS system: building loads of tens of sthenes, vehicle forces of hundreds of sthenes, bridge loads of thousands of sthenes.
Inputs
Results
5 sn = 5 kN = 5000 N
Inputs
Results
100 sn = 100 kN ≈ 22,481 lbf
A sthene (sn) is the unit of force in the metre-tonne-second (MTS) system. 1 sthene = 1000 newtons = 1 kilonewton exactly. It is the force needed to accelerate 1 tonne at 1 m/s².
Yes, 1 sn = 1000 N exactly. This follows directly from the definitions: 1 sn = 1 t·m/s² = 1000 kg·m/s² = 1000 N.
The sthene was used in France (introduced 1919) and the Soviet Union (official 1933-1955) as part of the MTS measurement system. It has been superseded by the SI system everywhere.
The metre-tonne-second system uses the metre, tonne (1000 kg), and second as base units. Its force unit is the sthene (1000 N) and pressure unit is the pieze (1000 Pa).
The pieze (pz) is the MTS unit of pressure: 1 pz = 1 sn/m² = 1000 Pa = 1 kPa. Like the sthene, it is rarely used today but appears in some historical French and Soviet documents.
Because the MTS system uses the tonne (1000 kg) instead of the kilogram. Since force = mass × acceleration, 1 sn = 1 t × 1 m/s² = 1000 kg × 1 m/s² = 1000 N.
No. It has been entirely replaced by the newton and kilonewton in all modern engineering standards. You may encounter it only in historical documents.
1 sn = 1 kN = 0.224809 kip. Multiply sthenes by 0.224809 to get kips.
The symbol is 'sn'. Some older French texts may use 'sth' or spell out 'sthène' (with accent).
1 sn = 1000 N = 1 kN ≈ 224.8 lbf ≈ 101.97 kgf ≈ 0.2248 kip. It is a moderately large force unit, about the weight of 100 kg.
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