Unités de base :

Longueur / Lengte:
=

Surface / Oppervlakte:
=

Volume:
=

Masse:
=

Vitesse:
/ =

Pression:
=

Température:
=

Energie:
=

Radioactivité:
=

Calculs géométriques:

Superficie d'un cercle: π * r² [où r = rayon et π = 3.14159]

Circonférence d'un cercle: 2 π r

Volume d'une sphère: 4/3 π * r³

Rayon
Le volume
4/3 π
*
(
)
²

Aire d'une sphère: 4 π * r²

Volume d'un cylindre: π * r² * L [où L = longueur du cylindre]

Aire d'un cylindre (base comprise) : 2 (L * π * r) + 2 (π * r²)

Volume d'un cône: π / 3 * r² * H [où H =hauteur du cône]

Rayon
Hauteur
Le volume
π/3
*
(
)
²
*

Aire d'un cône (sans la base) : A_l = \pi r \sqrt{r^2 + h^2} = \pi r^2 \sqrt{1 + \frac{h^2}{r^2}}

Pressure - Conversion Factors

To convert Into Multiply by
atmosphere bar 1.01295
atmosphere dynes/cm2 1.01295 x 106
atmosphere in. Hg 29.9213
atmosphere in. water 406.86
atmosphere kg/cm2 1.03325
atmosphere mbar 1012.95
atmosphere mtorr or micron Hg 7.6 x 105
atmosphere Pa or N/m2 1.01295 x 105
atmosphere PSI or lb/in2 14.696
atmosphere torr or mm Hg 760
bar atmosphere 0.9872
bar dynes/cm2 1 x 106
bar in. Hg 29.54
bar in. water 401.65
bar kg/cm2 1.02
bar mbar 1000
bar mtorr or micron Hg 7.5028 x 105
bar Pa or N/m2 1 x 105
bar psi or lb/in2 14.503861
bar torr or mm Hg 750.2838
dynes/cm2 atmosphere 9.872 x 10-7
dynes/cm2 bar 1 x 10-6
dynes/cm2 in. Hg 2.954 x 10-5
dynes/cm2 in. water 4.0165 x 10-4
dynes/cm2 kg/cm2 1.0200 x 10-6
dynes/cm2 mbar 1 x 10-3
dynes/cm2 mtorr or micron Hg 0.75028
dynes/cm2 Pa or N/m2 0.1
dynes/cm2 psi or lb/in2 1.4508 x 10-5
dynes/cm2 torr or mm Hg 7.5028 x 10-4
in. Hg atmosphere 3.342 x 10-2
in. Hg bar 3.385 x 10-2
in. Hg dynes/cm2 3.385 x 104
in. Hg in. water 13.598
in. Hg kg/cm2 3.4532 x 10-2
in. Hg mbar 33.85
in. Hg mtorr or micron Hg 2.54 x 104
in. Hg Pa or N/m2 3385
in. Hg psi or lb/in2 0.4912
in. Hg torr or mm Hg 25.4
in. water atmosphere 2.458 x 10-3
in. water bar 2.489 x 10-3
in. water dynes/cm2 2.489 x 103
in. water kg/cm2 2.5396 x 10-3
in. water in. Hg 7.354 x 10-2
in. water mbar 2.489
in. water mtorr or micron Hg 1.868 x 10-3
in. water Pa or N/m2 248.9
in. water psi or lb/in2 3.612 x 10-2
in. water torr or mm Hg 1.868
kg/cm2 atmosphere 0.9678
kg/cm2 bar 0.9804
kg/cm2 dynes/cm2 9.804 x 105
kg/cm2 in. Hg 28.958
kg/cm2 in. water 393.76
kg/cm2 mbar 9.804 x 102
kg/cm2 mtorr or micron Hg 7.3554 x 105
kg/cm2 Pa or N/m2 9.804 x 104
kg/cm2 psi or lb/in2 14.223
kg/cm2 torr or mm Hg 7.3554 x 102
mbar atmosphere 9.872 x 10-4
mbar bar 0.001
mbar dynes/cm2 1000
mbar kg/cm2 1.0200 x 10-3
mbar in. Hg 2.954 x 10-2
mbar in. water 0.4018
mbar mtorr or micron Hg 7.5028 x 102
mbar Pa or N/m2 100
mbar psi or lb/in2 1.450 x 10-2
mbar torr or mm Hg 0.75028
mtorr or micron Hg atmosphere 1.316 x 10-6
mtorr or micron Hg bar 1.3328 x 10-6
mtorr or micron Hg dynes/cm2 1.3328
mtorr or micron Hg kg/cm2 1.3595 x 10-6
mtorr or micron Hg in. Hg 3.937 x 10-5
mtorr or micron Hg in. water 5.353 x 10-4
mtorr or micron Hg mbar 1.3328 x 10-3
mtorr or micron Hg Pa or N/m2 0.13328
mtorr or micron Hg psi or lb/in2 1.934 x 10-5
mtorr or micron Hg torr or mm Hg 1 x 10-3
Pa or N/m2 atmosphere 9.869 x 10-6
Pa or N/m2 bar 1 x 10-5
Pa or N/m2 dynes/cm2 10
Pa or N/m2 kg/cm2 1.020 x 10-5
Pa or N/m2 in. Hg 2.954 x 10-4
Pa or N/m2 in. water 4.018 x 10-3
Pa or N/m2 mbar 0.01
Pa or N/m2 mtorr or micron Hg 7.5028
Pa or N/m2 psi or lb/in2 1.4508 x 10-4
Pa or N/m2 torr or mm Hg 7.5028 x 10-3
psi or lb/in2 atmosphere 0.068046
psi or lb/in2 bar 0.068948
psi or lb/in2 dynes/cm2 6.8948 x 104
psi or lb/in2 kg/cm2 7.0309 x 10-2
psi or lb/in2 in. Hg 2.036
psi or lb/in2 in. water 27.68
psi or lb/in2 mbar 68.948
psi or lb/in2 mtorr or micron Hg 5.171 x 104
psi or lb/in2 Pa or N/m2 6.8927 x 103
psi or lb/in2 torr or mm Hg 51.71
torr or mm Hg atmosphere 1.3158 x 10-3
torr or mm Hg bar 1.3328 x 10-3
torr or mm Hg dynes/cm2 1.3328 x 103
torr or mm Hg kg/cm2 1.3595 x 10-3
torr or mm Hg in. Hg 3.937 x 10-2
torr or mm Hg in. water 0.5353
torr or mm Hg mbar 1.3328
torr or mm Hg mtorr or micron Hg 1000
torr or mm Hg Pa or N/m2 133.28
torr or mm Hg psi or lb/in2 1.934 x 10-2