{"id":195,"date":"2008-01-10T04:21:09","date_gmt":"2008-01-10T04:21:09","guid":{"rendered":"https:\/\/www.garfnet.org.uk\/cms\/mathematical-and-other-constants\/"},"modified":"2026-09-02T16:57:21","modified_gmt":"2026-09-02T16:57:21","slug":"mathematical-and-other-constants","status":"publish","type":"page","link":"https:\/\/garfnet.org.uk\/cms\/tables\/general\/mathematical-and-other-constants\/","title":{"rendered":"Mathematical and other constants"},"content":{"rendered":"

This is a small collection of constants that might come in handy. These were collected in the days before search engines. So it is possible to obtain more accurate numbers on line. But I rather like having them in one place. Besides, they work on my old sliderule<\/a> just fine!<\/b><\/p>\n

Constant<\/span><\/a><\/div><\/th>
Abbreviation<\/span><\/a><\/div><\/th>
Value<\/span><\/a><\/div><\/th>
Units<\/span><\/a><\/div><\/th><\/tr><\/thead>
Pi<\/div><\/td>
p<\/div><\/td>
3.141592653589793<\/div><\/td>
<\/div><\/td><\/tr>
Euler's number<\/div><\/td>
e<\/div><\/td>
2.718281828459045<\/div><\/td>
<\/div><\/td><\/tr>
Absolute zero (0 Kelvin)<\/div><\/td>
<\/div><\/td>
-273.15<\/div><\/td>
Celsius<\/div><\/td><\/tr>
Acceleration due to Earth's gravity<\/div><\/td>
g<\/div><\/td>
9.80665<\/div><\/td>
metres\/second\u00b2<\/div><\/td><\/tr>
Avogadro's number<\/div><\/td>
N_A<\/div><\/td>
6.02214076e23<\/div><\/td>
molecules\/mole<\/div><\/td><\/tr>
Elementary charge<\/div><\/td>
e<\/div><\/td>
1.602176634e-19<\/div><\/td>
coulombs<\/div><\/td><\/tr>
Electron, mass of<\/div><\/td>
m_e<\/div><\/td>
9.1093837015e-31<\/div><\/td>
kg<\/div><\/td><\/tr>
Electron, charge\/mass ratio<\/div><\/td>
e\/m<\/div><\/td>
1.759 \u00d7 1011<\/sup><\/div><\/td>
coulombs\/kg<\/div><\/td><\/tr>
Electron, radius of<\/div><\/td>
r_e<\/div><\/td>
2.818 \u00d7 10-15<\/sup><\/div><\/td>
metres<\/div><\/td><\/tr>
Faraday's Constant<\/div><\/td>
F<\/div><\/td>
96485.33212<\/div><\/td>
C\/mole<\/div><\/td><\/tr>
Gas Constant<\/div><\/td>
R<\/div><\/td>
8.314462618<\/div><\/td>
joules\/(K\u00b7mole)<\/div><\/td><\/tr>
Gravitational constant<\/div><\/td>
G<\/div><\/td>
6.674 \u00d7 10-11<\/sup><\/div><\/td>
Newtons metres\u00b2\/kg\u00b2<\/div><\/td><\/tr>
Latent heat of evaporation of water<\/div><\/td>
<\/div><\/td>
2257000<\/div><\/td>
joules\/kg<\/div><\/td><\/tr>
Latent heat of fusion of ice<\/div><\/td>
<\/div><\/td>
333000<\/div><\/td>
joules\/kg<\/div><\/td><\/tr>
Mechanical equivalent of heat<\/div><\/td>
<\/div><\/td>
4.184<\/div><\/td>
joules\/calorie<\/div><\/td><\/tr>
Planck's constant<\/div><\/td>
h<\/div><\/td>
6.62607015e-34<\/div><\/td>
joules seconds<\/div><\/td><\/tr>
Velocity of sound at STP<\/div><\/td>
<\/div><\/td>
343<\/div><\/td>
metres\/second<\/div><\/td><\/tr>
Velocity of light in vacuo<\/div><\/td>
c<\/div><\/td>
2.998 \u00d7 108<\/sup><\/div><\/td>
metres\/second<\/div><\/td><\/tr>
Radius of Planet Earth<\/div><\/td>
<\/div><\/td>
6371000<\/div><\/td>
metres<\/div><\/td><\/tr>
Geostationary Orbit<\/div><\/td>
<\/div><\/td>
35786000<\/div><\/td>
metres<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n
\n

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This is a small collection of constants that might come in handy. These were collected in the days before search engines. So it is possible to obtain more accurate numbers on line. But I rather like having them in one place. Besides, they work on my old sliderule just fine! Home | Tables | General<\/p>\n","protected":false},"author":1,"featured_media":43394,"parent":646,"menu_order":14,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"class_list":["post-195","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nMathematical and other constants - GarfNet<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/garfnet.org.uk\/cms\/tables\/general\/mathematical-and-other-constants\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mathematical and other constants - GarfNet\" \/>\n<meta property=\"og:description\" content=\"This is a small collection of constants that might come in handy. 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