SI-Einheiten, Formelzeichen und Beziehungen

Größe, Formelzeichen

Einheit, Kurzzeichen

Beziehung

Länge, l

Meter, m

1 m = 10dm = 100cm = 1000mm
1 Seemeile (sm) = 1852m
1 Å ngström (Å ) = 10-10m
1 Siegbahn-X-Einheit (X-E) = 10-13m
1 mile (mi) = 1609m
1 yard (yd) = 3ft = 0,9144m
1 foot (ft) = 12 inch = 0,3048m
1 inch (in) = 25,4mm

Fläche, A

Quadratmeter, m²
Ar oder a
Hektar, ha

1 Km² = 1000m² = 100ha
1 Ar = 100m²
1 ha = 100 Ar = 10000m²

Volumen, V

Kubikmeter, m³

1m³ = 1000dm³
1 Liter (l) = 1dm³
1 cubic foot (ft³) = 28,32dm³
1 register ton = 100ft³
1 brit. gallon (gal) = 4,5461dm³
1 US gallon (gal) = 3,785dm³
1 US-Barrel = 42 US gallon = 158,987 Liter

Masse, m

Kilogramm, Kg

1 Kg = 1000g
1 long ton (ltn) = 1016,047Kg
1 pound (lb) = 16 oz (av) = 0,45359237Kg
1 oz (av - avoirdupois = Handelsgewicht) = 28,3495g
1 oz (tr - troy = Edelmetallgewicht) = 31,1035g
1 Karat (Edelsteingewicht) = 0,2g
1 Zentner (ztr) = 50Kg

Kraft, F

Newton, N

1 N = 1Kg m/s² = 1 W s/m = 1J/m
1 kp = 9,80665N

Arbeit, W

Engerie, E

Joule, J

1 J = 1Nm = 1Kg m²/s² = 1Ws = 107erg
1 KWh = 3,6*106J = 860 kcal
1 cal = 4,1868J

Leistung, P

Watt, W

1 W = 1J/s = 1Nm/s = 1Kg m²/s³
1 KW = 1,3596 PS
1 horsepower (PS) = 735,49875 W

Druck, p

Pascal, Pa
Bar
Torr
pound-force / square inch
mm Wassersäule
mm Quecksilbersäule

1 Pa = 1N/m² = 1Kg/(m s²) = 1J/m³
1 bar = 105Pa = 0,1N/mm² = 0,1MPa
1 Torr = 1,333224mbar
1 psi = 68,95mbar
1 mmWS = 98,0665*10-3mbar
1 mmHg = 133,322Pa
1 atü = 0,980665 bar

Geschwindigkeit, v

Meter pro Sekunde

Knoten (kn)

1 m/s = 3,6 Km/h = 2,2369 mile/h
1 kn = 1 sm/h = 1 ft/s = 1,852Km/h
1 Km/h = 0,6214 mile/h

dynamische Viskosität, h

Pascalsekunde, Pa s

1 m Pa s = 10-3N/m²

kinematische Viskosität, n

 

1 mm²/s = 10-6m²/s

elektr. Ladung, Q

Coulomb, As

1 C = 1 As
1 Ah = 3,6*10³As = 3,6 KAs

Spannung, U

Volt, V

1 V = 1W/A = 1 AW = 1Kg m²/A s³

Stromstärke, I

Ampere, A

1 A = 1000mA

elktr. Kapazität, C

Farad, F

1 F = 1C/V = 1 Ss = 1H/W ²

magnetischer Fluß,F

Weber, Wb

1 Wb = 1 Vs = 1Tm² = 1 AH

mag. Flußdichte, B

Telsa, T

1 T = 1 Wb/m² = 1Vs/m²

Induktivität, L

Henry, H

1 H = 1 Wb/A = 1 W s = 1 FW ² = 1 s/S