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Unit Converter

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Energy and radiation wavelength

Radiation spectrum

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Frequency / Wavelength / Energy Calculator


Frequency and wavelength of radiations are related to one another through the speed at which light travels.

Equation: f * λ = c
Equation: E = hc/λ

where:
f = frequency in Hertz (Hz = 1 cycle/sec)
λ = wavelength in meters (m)
c = the speed of light (approximately equal to 3*108 m/s)
E = energy in electron Volts (eV)
h = Planck's constant (6.626068 × 10-34 m2kg/s)

To convert wavelength to frequency enter the wavelength in microns (μm) and press "Calculate f and E". The corresponding frequency will be in the "frequency" field in GHz.

OR enter the frequency in gigahertz (GHz) and press "Calculate λ and E" to convert to wavelength.
Wavelength will be in μm.

OR enter the energy in eV and click "Calculate λ and F" and the values will appear in the corresponding fields.

 
Wavelength:
(λ)
 		[μm] Frequency:
(f)
 		[GHz] Energy:
(E)
 		[eV]

Radiation type:

 

eV to Watt per second converter

1 Watt-second (W · s) = 1 Joule (J)= 6.241 509 126 x 1018 electronVolts (eV)

Energy (eV)     to     Watt per sec (Joule)  

 

 

Watts To Photons Per Second Calculator

OBS! 500 nm = 0.0000005 m


Basic Calculator
Advanced Calculator

 

Photon Flux to Radiant Flux Calculator

Converting Photon Energy from Wavelength

The energy of the photon \(E\) can be be calculated using the equation \( E = {hc \over \lambda} \). In this equation Planck's constant \(h\) and the speed of light in vacuum \(c\) are known values, so only the wavelength \(\lambda\) is needed to calculate the energy.

Converting Photon Flux \(photon \over {second} \) to Radiant Flux \(W\):

The Radiant Flux \(\Phi_e\) is equal to the energy of the photon \(E\) times the photon rate \(1\over second\) $$\Phi_e = E \times {photon \over second} $$ This equation gives the Radiant Flux in units of \(Joule \over second \) which is equivalent to \(Watt\).



Wavelength

Photon Energy
\( J \)
Photon Rate
\(1 \over s \)
Radiant Flux

Energy of a single photon at a given frequency

E = h·f

where:
f = frequency in Hertz (conversion table is at the bottom of this page)
E = energy in electron Volts (eV)
h = Planck's constant (6.626068 × 10-34 m2kg/s)
f = frequency in Hertz (an equivalence calculator is at the bottom of this page)

Frequency (Hz)         Energy (Joule)  

 

 

Power level variation by dB value

Power level (Watt)
Gain or attenuation (dB or -dB)
Resulting power level
dBW = Watts
   

 

 

Path loss in free space calculator
Select
a
distance unit: 		distance in meters
distance in km
distance in million km
distance in lightyears
Frequency: Input frequency
Gain TX antenna: Input gain TX antenna
Gain RX antenna: Input gain RX antenna
Distance:
Path loss:

 

Wavelength to frequency and viceversa multiple output converter.

Enter a valid value into a field below. Select a result in any which one field and hit your keyboard "delete" button to clear all fields.

hertz [Hz]:
exahertz [EHz]:
petahertz [PHz]:
terahertz [THz]:
gigahertz [GHz]:
megahertz [MHz]:
kilohertz [kHz]:
hectohertz [hHz]:
dekahertz [daHz]:
decihertz [dHz]:
centihertz [cHz]:
millihertz [mHz]:
microhertz [µHz]:
nanohertz [nHz]:
picohertz [pHz]:
femtohertz [fHz]:
attohertz [aHz]:
cycle/second:
wavelength in exametres:
wavelength in petametres:
wavelength in terametres:
wavelength in gigametres:
wavelength in megametres:
wavelength in kilometres:
wavelength in hectometres:
wavelength in dekametres:
wavelength in metres [m]:
wavelength in decimetres:
wavelength in centimetres:
wavelength in millimetres:
wavelength in micrometres:
Electron Compton wavelength:
Proton Compton wavelength:
Neutron Compton wavelength:

SI - Metric system prefixes
FACTOR
...or in full ...
or in
words
SI
PREFIX
SI
SYMBOL
1,0E+24
1,0E+21
1,0E+18
1,0E+15
1,0E+12
1,0E+9
1,0E+6
1,0E+3
1,0E+2
1,0E+1
1,0E-1
1,0E-2
1,0E-3
1,0E-6
1,0E-9
1,0E-12
1,0E-15
1,0E-18
1,0E-21
1,0E-24 		1 000 000 000 000 000 000 000 000
1 000 000 000 000 000 000 000
1 000 000 000 000 000 000
1 000 000 000 000 000
1 000 000 000 000
1 000 000 000
1 000 000
1 000
100
10
0,1
0,01
0,001
0,000 001
0,000 000 001
0,000 000 000 001
0,000 000 000 000 001
0,000 000 000 000 000 001
0,000 000 000 000 000 000 001
0,000 000 000 000 000 000 000 001		 septillion
sextillion
quintillion
quadrillion
trillion
billion
million
thousand
hundred
ten
tenth
hundredth
thousandth
millionth
billionth
trillionth
quadrillionth
quintillionth
sextillionth
septillionth
yotta-
zetta-
exa-
peta-
tera-
giga-
mega-
kilo-
hecto-
deca-
deci-
centi-
milli-
micro-
nano-
pico-
femto-
atto-
zepto-
yocto-
Y
Z
E
P
T
G
M
k
h
da
d
c
m
µ
n
p
f
a
z
y

Solar radiation spectrum

Note Frequency Period

Note Frequency Period

Note Frequency Period

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bit byte gegabyte

Prefixes for binary multiples
 Factor  Name  Symbol  Origin Derivation 
 210 kibi Ki kilobinary: (210)1 kilo: (103)1
 220 mebi Mi megabinary: (210)2  mega: (103)2
 230 gibi Gi gigabinary: (210)3 giga: (103)3
 240 tebi Ti terabinary: (210)4 tera: (103)4
 250 pebi Pi petabinary: (210)5 peta: (103)5
 260 exbi Ei exabinary: (210)6 exa: (103)6
Examples and comparisons with SI prefixes
one kibibit  1 Kibit = 210 bit = 1024 bit
one kilobit  1 kbit = 103 bit = 1000 bit
one byte  1 B = 23 bit = 8 bit
one mebibyte  1 MiB = 220 B = 1 048 576 B
one megabyte  1 MB = 106 B = 1 000 000 B
one gibibyte  1 GiB = 230 B = 1 073 741 824 B
one gigabyte  1 GB = 109 B = 1 000 000 000 B

The Man in the Panther's Skin, by Shot'ha Rust'haveli,translated by Marjory Scott Wardrop [1912]

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