Menu
×
   ❮   
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP HOW TO W3.CSS C C++ C# BOOTSTRAP REACT MYSQL JQUERY EXCEL XML DJANGO NUMPY PANDAS NODEJS R TYPESCRIPT ANGULAR GIT POSTGRESQL MONGODB ASP AI GO KOTLIN SASS VUE DSA GEN AI SCIPY AWS CYBERSECURITY DATA SCIENCE
     ❯   

SciPy Constants


Constants in SciPy

As SciPy is more focused on scientific implementations, it provides many built-in scientific constants.

These constants can be helpful when you are working with Data Science.

PI is an example of a scientific constant.

Example

Print the constant value of PI:

from scipy import constants

print(constants.pi)
Try it Yourself »

Constant Units

A list of all units under the constants module can be seen using the dir() function.

Example

List all constants:

from scipy import constants

print(dir(constants))
Try it Yourself »

Unit Categories

The units are placed under these categories:

  • Metric
  • Binary
  • Mass
  • Angle
  • Time
  • Length
  • Pressure
  • Volume
  • Speed
  • Temperature
  • Energy
  • Power
  • Force


Metric (SI) Prefixes:

Return the specified unit in meter (e.g. centi returns 0.01)

Example

from scipy import constants

print(constants.yotta)    #1e+24
print(constants.zetta)    #1e+21
print(constants.exa)      #1e+18
print(constants.peta)     #1000000000000000.0
print(constants.tera)     #1000000000000.0
print(constants.giga)     #1000000000.0
print(constants.mega)     #1000000.0
print(constants.kilo)     #1000.0
print(constants.hecto)    #100.0
print(constants.deka)     #10.0
print(constants.deci)     #0.1
print(constants.centi)    #0.01
print(constants.milli)    #0.001
print(constants.micro)    #1e-06
print(constants.nano)     #1e-09
print(constants.pico)     #1e-12
print(constants.femto)    #1e-15
print(constants.atto)     #1e-18
print(constants.zepto)    #1e-21
Try it Yourself »

Binary Prefixes:

Return the specified unit in bytes (e.g. kibi returns 1024)

Example

from scipy import constants

print(constants.kibi)    #1024
print(constants.mebi)    #1048576
print(constants.gibi)    #1073741824
print(constants.tebi)    #1099511627776
print(constants.pebi)    #1125899906842624
print(constants.exbi)    #1152921504606846976
print(constants.zebi)    #1180591620717411303424
print(constants.yobi)    #1208925819614629174706176
Try it Yourself »

Mass:

Return the specified unit in kg (e.g. gram returns 0.001)

Example

from scipy import constants

print(constants.gram)        #0.001
print(constants.metric_ton)  #1000.0
print(constants.grain)       #6.479891e-05
print(constants.lb)          #0.45359236999999997
print(constants.pound)       #0.45359236999999997
print(constants.oz)          #0.028349523124999998
print(constants.ounce)       #0.028349523124999998
print(constants.stone)       #6.3502931799999995
print(constants.long_ton)    #1016.0469088
print(constants.short_ton)   #907.1847399999999
print(constants.troy_ounce)  #0.031103476799999998
print(constants.troy_pound)  #0.37324172159999996
print(constants.carat)       #0.0002
print(constants.atomic_mass) #1.66053904e-27
print(constants.m_u)         #1.66053904e-27
print(constants.u)           #1.66053904e-27
Try it Yourself »

Angle:

Return the specified unit in radians (e.g. degree returns 0.017453292519943295)

Example

from scipy import constants

print(constants.degree)     #0.017453292519943295
print(constants.arcmin)     #0.0002908882086657216
print(constants.arcminute)  #0.0002908882086657216
print(constants.arcsec)     #4.84813681109536e-06
print(constants.arcsecond)  #4.84813681109536e-06
Try it Yourself »

Time:

Return the specified unit in seconds (e.g. hour returns 3600.0)

Example

from scipy import constants

print(constants.minute)      #60.0
print(constants.hour)        #3600.0
print(constants.day)         #86400.0
print(constants.week)        #604800.0
print(constants.year)        #31536000.0
print(constants.Julian_year) #31557600.0
Try it Yourself »

Length:

Return the specified unit in meters (e.g. nautical_mile returns 1852.0)

Example

from scipy import constants

print(constants.inch)              #0.0254
print(constants.foot)              #0.30479999999999996
print(constants.yard)              #0.9143999999999999
print(constants.mile)              #1609.3439999999998
print(constants.mil)               #2.5399999999999997e-05
print(constants.pt)                #0.00035277777777777776
print(constants.point)             #0.00035277777777777776
print(constants.survey_foot)       #0.3048006096012192
print(constants.survey_mile)       #1609.3472186944373
print(constants.nautical_mile)     #1852.0
print(constants.fermi)             #1e-15
print(constants.angstrom)          #1e-10
print(constants.micron)            #1e-06
print(constants.au)                #149597870691.0
print(constants.astronomical_unit) #149597870691.0
print(constants.light_year)        #9460730472580800.0
print(constants.parsec)            #3.0856775813057292e+16
Try it Yourself »

Pressure:

Return the specified unit in pascals (e.g. psi returns 6894.757293168361)

Example

from scipy import constants

print(constants.atm)         #101325.0
print(constants.atmosphere)  #101325.0
print(constants.bar)         #100000.0
print(constants.torr)        #133.32236842105263
print(constants.mmHg)        #133.32236842105263
print(constants.psi)         #6894.757293168361
Try it Yourself »

Area:

Return the specified unit in square meters(e.g. hectare returns 10000.0)

Example

from scipy import constants

print(constants.hectare) #10000.0
print(constants.acre)    #4046.8564223999992
Try it Yourself »

Volume:

Return the specified unit in cubic meters (e.g. liter returns 0.001)

Example

from scipy import constants

print(constants.liter)            #0.001
print(constants.litre)            #0.001
print(constants.gallon)           #0.0037854117839999997
print(constants.gallon_US)        #0.0037854117839999997
print(constants.gallon_imp)       #0.00454609
print(constants.fluid_ounce)      #2.9573529562499998e-05
print(constants.fluid_ounce_US)   #2.9573529562499998e-05
print(constants.fluid_ounce_imp)  #2.84130625e-05
print(constants.barrel)           #0.15898729492799998
print(constants.bbl)              #0.15898729492799998
Try it Yourself »

Speed:

Return the specified unit in meters per second (e.g. speed_of_sound returns 340.5)

Example

from scipy import constants

print(constants.kmh)            #0.2777777777777778
print(constants.mph)            #0.44703999999999994
print(constants.mach)           #340.5
print(constants.speed_of_sound) #340.5
print(constants.knot)           #0.5144444444444445
Try it Yourself »

Temperature:

Return the specified unit in Kelvin (e.g. zero_Celsius returns 273.15)

Example

from scipy import constants

print(constants.zero_Celsius)      #273.15
print(constants.degree_Fahrenheit) #0.5555555555555556
Try it Yourself »

Energy:

Return the specified unit in joules (e.g. calorie returns 4.184)

Example

from scipy import constants

print(constants.eV)            #1.6021766208e-19
print(constants.electron_volt) #1.6021766208e-19
print(constants.calorie)       #4.184
print(constants.calorie_th)    #4.184
print(constants.calorie_IT)    #4.1868
print(constants.erg)           #1e-07
print(constants.Btu)           #1055.05585262
print(constants.Btu_IT)        #1055.05585262
print(constants.Btu_th)        #1054.3502644888888
print(constants.ton_TNT)       #4184000000.0
Try it Yourself »

Power:

Return the specified unit in watts (e.g. horsepower returns 745.6998715822701)

Example

from scipy import constants

print(constants.hp)         #745.6998715822701
print(constants.horsepower) #745.6998715822701
Try it Yourself »

Force:

Return the specified unit in newton (e.g. kilogram_force returns 9.80665)

Example

from scipy import constants

print(constants.dyn)             #1e-05
print(constants.dyne)            #1e-05
print(constants.lbf)             #4.4482216152605
print(constants.pound_force)     #4.4482216152605
print(constants.kgf)             #9.80665
print(constants.kilogram_force)  #9.80665
Try it Yourself »


×

Contact Sales

If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail:
sales@w3schools.com

Report Error

If you want to report an error, or if you want to make a suggestion, send us an e-mail:
help@w3schools.com

W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use, cookie and privacy policy.

Copyright 1999-2024 by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.CSS.