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Common Units and Conversion Table

Length

mftin
1 m (meter)1.0003.28139.370
1 ft (foot)0.3051.00012.000
1 in (inch)0.0250.0831.000

Mass

kglboz
1 kg (kilogram)1.0002.20535.274
1 lb (pound)0.4541.00016.000
1 oz (ounce)0.0280.0631.000

Suction rate

m³/sI/sm³/hL/min
m³/s1.001,0003,60060,000
I/s10⁻³1.003.660
m³/h2.78 x 10⁻⁴0.2781.0016.67
L/min1.67 x 10⁻⁵1.67 x 10⁻²0.061.00

Pressure

barN/cm²kPAmbar
1 bar1.001010010³
1 N/cm²0.11.0010100
1 kPa0.010.11.0010
1 mbar10⁻³0.010.11.00

Volume

cm³l
1.001 x 10⁶1,000
cm³1 x 10⁻⁶1.001 x 10⁻³
l1 x 10⁻³1,0001.00

Vacuum ranges

Absolute pressure in mbarMean free path of atoms*
Low vacuum1,000 - 168 nm - 0,1 mm
Medium vacuum1 - 10⁻³0.1mm - 100mm
High vacuum10⁻³ - 10⁻⁷100mm - 1km
Ultra high vacuum<10⁻⁷>1km

Thread

Thread designationExternal diameter (mm)Bead wire diameterPitch (mm)
Metric ISO thread
M33.002.50.50
M44.003.20.70
M55.004.10.80
M66.004.91.00
M88.006.61.25
M1010.008.41.50
M1212.0010.11.75
Metric ISO fine thread
M14x1.514.0012.51.50
M16x116.00
M20x1.520.00
M30x1.530.00
Pipe thread
G 189.738.50.91
G 1413.1611.41.34
G 3816.6614.91.34
G 1221.0018.61.81