Conversion des unités
Longueur [modifier]
Nom | Nom anglais(1) | Symbole | Équivalence |
---|---|---|---|
mètre | metre ou meter | m | (Unité de base du SI) |
centimètre | cm | (Unité de base du système CGS) ≡ 10-2m | |
fermi | ≡ 10-15m | ||
siegbahn | X-unit | xu | ≈ 1,0000021×10-13m |
stigma | stigma | ≡ 10-12m = 1 pm | |
ångström | Å | ≡ 10-10m = 0,1 nm | |
micromètre, Micron | μ | ≡ 10-6m = 1 μm | |
twip | twp | ≡ 1/1440 in ≈ 17,639 μm | |
mil; thou | mil | ≡ 0,001 in = 25,4 μm | |
mickey | ≡ 1/200 in = 0,127 mm | ||
calibre | cal | ≡ 1/100 in = 0,254 mm | |
ligne | line | ln | ≡ 1/12 in ≈ 2,116 667 mm |
ligne (Paris) | l | ≡ 1/12 p ≈ 2,255 829 mm | |
grain d'orge | barleycorn | ≡ 1/3 in ≈ 8,466 667 mm | |
doigt | finger | ≡ 7/8 in = 22,225 mm | |
pouce | inch | in | ≡ 2,54 cm |
pouce (Paris) | p | ≡ 1/12 P ≈ 27,069 949 mm | |
stick | ≡ 2 in = 50,8 mm | ||
clou | nail | ≡ 2 1/4 in = 57,15 mm | |
paume | palm | ≡ 3 in = 76,2 mm | |
main | hand | ≡ 4 in = 101,6 mm | |
doigt (tissu) | finger (cloth) | ≡ 4 1/2 in = 114,3 mm | |
empan | span | ≡ 6 in = 152,4 mm | |
chaînon de Gunter | link (Gunter's) | lnk | ≡ 66/100 ft = 0,201 168 m |
quart | span (cloth); quarter | ≡ 1/4 yd = 9 in = 0,2286 m |
|
pied | foot | ft | ≡ 12 in = 0,3048 m |
pied (Paris); pied de roi | P | ≈ 0,324 839 385 m | |
pied (québécois) | P | ≡ 0,324 840 6 m | |
coudée | cubit | ≡ 18 in = 0,4572 m | |
pas | pace | ≡ 2 1/2 ft = 0,762 m | |
verge | yard | yd | ≡ 3 ft = 0,9144 m |
aune | ell | ≡ 45 in = 1,143 m | |
aune (Paris) | ≡ 3 P 7 p 10 l ≈ 1,186 566 m | ||
pas double | double pace; milli-mile | ≡ 1/1000 mi = 1,609 344 m | |
brasse; toise marine | fathom | fm | ≡ 6 ft = 1,8288 m (parfois ≡ 1/1000 NM = 1,852 m) |
toise (Paris) | T | ≡ 6 P = 864/443,296 m ≈ 1,949 036 310 m | |
toise (québécoise) | T | ≡ 1,949 043 6 m | |
perche | rod; pole; perch | rd | ≡ 16 1/2 ft = 5,0292 m |
perche (Paris) | per | ≡ 18 P = 2592/443,296 m≈ 5,847 108 929 m | |
perche (québécoise) | per | ≡ 5,847 130 8 m | |
corde | rope | ≡ 20 ft = 6,096 m | |
perche ordinaire | per | ≡ 20 P = 2880/443,296 m ≈ 6,496 787 70 m | |
chaîne de Gunter | chain (Gunter's) | ch | ≡ 66 ft = 20,1168 m |
chaîne de Ramden | chain (Ramden's; Engineer's) | ch | ≡ 100 ft = 30,48 m |
arpent | arp | ≡ 180 P = 25 920/443,296 m ≈ 58,471 089 295 m | |
arpent (québécois) | arp | ≡ 58,471 308 m | |
encablure | cable length | ≡ 1/10 NM = 185,2 m | |
encablure (Royal Navy) | cable length (imperial) | ≡ 608 ft = 185,3184 m | |
furlong | furlong | fur | ≡ 660 ft = 201,168 m |
encablure (US Navy) | cable length (U.S.) | ≡ 720 ft = 219,456 m | |
mille (terrestre) | mile | mi | ≡ 1760 yd = 5280 ft = 1609,344 m |
mille américain | U.S. Survey mile; statute mile | mi | ≡ 5280 ft US (1 ft US ≡ 1200/3937 m) ≈ 1,609 347 219 km |
mille marin international | nautical mile (international) | NM | ≡ 1852 m |
mille marin (anglais) | nautical mile (Admiralty) | NM | ≡ 6080 ft = 1853,184 m |
mille géographique | geographical mile | mi | ≡ 6082 ft = 1853,7936 m |
mille télégraphique | telegraph mile | mi | ≡ 6087 ft = 1855,3176 m |
lieue postale | ≡ 2000 T ≈ 3,898 072 620 km | ||
lieue terrestre | ≡ 2280 T ≈ 4,443 802 786 km | ||
lieue | league | ≡ 3 mi = 4,828 032 km | |
lieue américaine | statute league | ≡ 3 mi (US) ≈ 4,828 041 656 km | |
lieue nautique; lieue marine | nautical league | NL | ≡ 3 NM = 5,556 km |
unité astronomique | astronomical unit | ua | = 149 597 870,691 ± 0,030 km |
année-lumière | light-year | ≡ c0×86 400×365,25 = 9,460 730 472 580 8×1015 m | |
parsec | pc | ≈ 180×60×60/π ua ≈ 206 264,806 25 ua = 3,261 563 776 9 ± 6×10-10 années-lumière = 3,085 677 581 3×1016 ± 6×106 m | |
Lud | Ld | ≈ 5 pied 4' |
Récapitulatif des conversions :
unité | Kilomètre (km) | Hectomètre (hm) | Décamètre (dam) | Mètre (m) | Décimètre (dm) | Centimètre (cm) | Millimètre (mm) |
---|---|---|---|---|---|---|---|
km | 1 | 10 | 100 | 1 000 | 10 000 | 100 000 | 1 000 000 |
hm | 0.1 | 1 | 10 | 100 | 1 000 | 10 000 | 100 000 |
dam | 0.01 | 0.1 | 1 | 10 | 100 | 1 000 | 10 000 |
m | 0.001 | 0.01 | 0.1 | 1 | 10 | 100 | 1 000 |
dm | 0.000 1 | 0.001 | 0.01 | 0.1 | 1 | 10 | 100 |
cm | 0.000 01 | 0.000 1 | 0.001 | 0.01 | 0.1 | 1 | 10 |
mm | 0.000 001 | 0.000 01 | 0.000 1 | 0.001 | 0.01 | 0.1 | 1 |
Surface [modifier]
Nom | Nom anglais(1) | Symbole | Équivalence |
---|---|---|---|
mètre carré | square metre | m2 | ≡ 1 m2 |
barn | barn | b | ≡ 10-28 m2 = 100 fm2 |
circular mil; circular thou | circ mil | ≡ πD2/4 (lorsque D = 1 mil) ≈ 5,067 074 791×10-10 m2 | |
square mil; square thou | sq mil | ≡ 1 mil2 = 6,4516×10-10 m2 | |
inch inch | circ in | ≡ πD2/4 (lorsque D = 1 in) ≈ 5,067 074 791×10-4 m2 | |
pouce carré | square inch | sq in | ≡ 1 in2 = 6,4516×10-4 m2 |
planche | board | bd | ≡ 1 in × 1 ft = 7,741 92×10-3 m2 |
pied carré | square foot | sq ft | ≡ 1 ft2 = 0,092 903 04 m2 |
verge carrée | square yard | sq yd | ≡ 1 yd2 = 0,836 127 36 m2 |
corde (de bois) | cord | ≡ 192 planches = 1,486 448 64 m2 | |
boiler horsepower EDR (equivalent direct radiation) | ≡ 1 sq ft × 1 bhp / 240 BTU/h ≈ 12,958 m2 |
||
perche carrée | square rod; square pole; square perch | sq rd | ≡ 1 rd2 = 25,292 852 64 m2 |
are | a | ≡ 100 m2 | |
chaîne carrée | square chain | sq ch | ≡ 1 ch2 = 404,685 642 24 m2 |
vergée | rood | ro | ≡ 1/4 ac = 1011,714 105 6 m2 |
acre | acre | ac | ≡ 10 sq ch = 4840 sq yd = 4046,856 422 4 m2 |
hectare | ha | ≡ 10 000 m2 = 0,01 km2 | |
préau | virgate ou yardland | ≡ 30 ac = 0,121 405 692 672 km2 | |
hide | ≡ 100 ac = 0,404 685 642 24 km2 | ||
mille carré | square mile; section | sq mi | ≡ 1 mi2 = 640 ac = 2,589 988 110 336 km2 |
baronnie | barony | ≡ 4000 ac = 16,187 425 689 6 km2 | |
commune | township | ≡ 36 sq mi = 93,239 571 972 096 km2 | |
canton | township | ≡ 100 sq mi = 342,9904 km2 |