Scope Multimeter General Reference
107
9.11.4 Units of Measurement / Conversions
Base Units
(Symbol) / Unit Prefix Typical Expressions
(µ) micro 0.000001 or 10
-6
or 1/1,000,000
(m) milli 0.001 or 10
-3
or 1/1,000
(c) centi 0.01 or 10
-2
or 1/100
(k) kilo 10
3
or 1,000
(M) mega 10
6
or 1,000,000
Electrical Units
(Symbol) / Description Equivalents
(V) Voltage V = I × R
(I) Current I = V ÷ R
(R) or (Ω) Resistance R = V ÷ I
(Hz) Frequency ƒ(freq.) = 1 ÷ T(time) or 1 cycle per second
Voltage
(µV) microvolt 1 µV = 0.000001 V
(mV) millivolt 1 mV = 0.001 V
(V) volt 1 V = 1000 mV
(kV) kilovolt 1kV = 1,000 Volts.
Ohms
(mΩ) milliohm 1 mΩ = 0.001 ohms
(Ω) ohm 1 Ω = 1000 mΩ
(kΩ) kiloohm 1 kΩ = 1000 Ω
(MΩ) megaohm 1 MΩ = 1,000,000 Ω
Amperes
(µA) microamps 1 µA = 0.000001 amps
(mA) milliamps 1 mA = 0.001 amps
(A) amps 1A = 1000 mA
(ka) kiloamps 1 ka = 1000 amps
Frequency
(MHz) megahertz 1 MHz = 1,000,000 Hertz
(kHz) kilohertz 1 kHz = 1000 Hertz
Pressure Units
(Symbol) / Description Equivalents
(psi) pounds per square inch
1 psi = 6894.757 Pa
1 psi = 0.06894757 bar
1 psi = 2.036021 inHg
(bar)
1 bar = 14.50377 psi
1 bar = 100000 Pa
1 bar = 29.52999 inHg
(Mbar) Millibar 1 Mbar = 0.001 bar
(Pa) pascal
1 Pa = 0.0001450377 psi
1 Pa = 0.00001 bar
1 Pa = 0.0002952999 inHg
(kPa) KiloPasca 1 kPa = 1000 Pa
(MPa) Megapascal 1 MPa = 1,000,000 Pa
(inHg) inches of mercury
1 inHg = 0.03386388 bar
1 inHg = 0.4911541 psi
1 inHg = 3386.388 Pa
Pressure Conversions
psi x 0.0689 = bar
psi x 6.8950 = kPa
psi x 0.0703 = kg/cm²
bar x 14.5030 = psi
bar x 100.0000 = kPa
bar x 29.5300 = inHg (60°F)
kPa x 0.1450 = psi
kPa x 0.0100 = bar
kPa x 0.0102 = kg/cm²
kPa x 0.295299 = inHg
kg/cm² x 98.0700 = psi
kg/cm² x 0.9807 = bar
kg/cm² x 14.2200 = kPa
inHg (60°) x 0.0333 = bar
inHg (60°) x 3.3770 = kPa
inHg (60°) x 0.0344 = kg/cm²
inHg x 25.4 = mmHg
mmHg x 0.003994 = inHg
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