Orders of magnitude
area
angular velocity
charge
currency
data
density
energy
frequency
length
magnetic field
mass
numbers
power
pressure
specific energy density
specific heat capacity
speed
temperature
time
volume
Conversion of units
physical unit
SI
SI base unit
SI derived unit
SI prefix
Planck units

To help compare different orders of magnitude, the following list describes various frequencies.

Examples

• 0.25 Hz, approximate frequency of an adult human's resting breathing rate
• 1 to 1.66666666... Hz, approximate frequency of an adult human's resting heart beat
• 2 Hz, 120 bpm, one of the most common tempos in music.
• 10 Hz, cyclic rate of a typical automobile engine at idle (equivalent to 600 rpm)
• 50 Hz or 60 Hz (50 Hz for European AC, Tokyo AC or 60 Hz for American AC, Osaka AC), electromagnetic — standard AC mains power
• 100 Hz, cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm)
• 261.626 Hz, acoustic — the musical note middle C
• 440 Hz, acoustic — concert pitch (A above middle C), used for tuning musical instruments
• 20 Hz to ~14 kHz, acoustic — normal range of adult human hearing (most children and some animals perceive sounds outside this range, most teens and children can hear frequencies from 14 kHz up to ~16 kHz where most adults can't)
• 17.4 kHz, a frequency know as "The Mosquito," used by The Mosquito to discourage loitering. This frequency is generally only audible to those under the age of 24.
• 530 kHz to 1.710 MHz, electromagnetic — AM radio broadcasts
• 740 kHz, transitions — the clock speed of the world's first commercial microprocessor, the Intel 4004 (1971)
• 1 MHz to 8 MHz, transitions — clock speeds of early home/personal computers (mid-1970s to mid-1980s)
• 42 MHz to 260 MHz, electromagnetic — VHF terrestrial TV broadcast channels
• 88 MHz to 108 MHz, electromagnetic — FM radio broadcasts
• 902 MHz to 928 MHz, common cordless telephone frequency in the US
• 1420 MHz — the hyperfine transition of hydrogen, also known as the hydrogen line or 21 cm line
• 0.8 to 2.3 GHz, (electromagnetic) - mobile phone conversation channels.
• 1920-1930 MHz, another common cordless telephone frequency introduced to the US in October 2005
• 2.4 GHz, (electromagnetic) - microwave ovens, Wireless LANs and cordless phones (starting in 1998).
• 3.80 GHz, transitions — highest clock speed Pentium 4 "Prescott" microprocessor (2005)
• 5.8 GHz, cordless phone frequency introduced in 2003
• 845 GHz, fastest transistor (Dec. 2006)
• 428 THz to 750 THz, electromagnetic — visible light, from red to violet
• 2.47 × 10¹⁵ hertz (2.47 petahertz) — Lyman-alpha line
• 30 Petahertz (PHz), electromagnetic — x-rays
• 300 Exahertz (EHz) and above - gamma rays
• 1.85×10⁴³ Hz - Planck frequency, the inverse of the Planck time

Lower frequencies

• Once per minute (one rpm): about 16.667 mHz
• Hourly: about 277.8 µHz
• Daily: about 11.57 µHz
• Weekly: about 1.653 µHz
• Monthly: about 380.5 nHz
• Yearly: about 31.71 nHz
• Once per decade: about 3.171 nHz
• Once per generation: about 1 nHz
• Once per century: about 317.1 pHz
• Once per millennium: about 31.71 pHz

Radio spectrum

See also

• Hertz