1.長度換算表公里km.米m.厘米cm.英里mi.海里kt.碼yd.英尺ft.英寸in.110001000000.6213820.5396111093.633280.8939370.70.00111000.0006210.0005391.093633.2808939.37070.000010.0110.0000060.0000050.01093630.0328080.3937071.609311609.3116093110.86896117605280633601.85318531853181.150812025.416076.2172914.60.00091491438391.43830.0005680.00049413360.0003040.30479430.47940.0001890.0001640.3333331120.0000250.0253992.539950.0000150.0000130.0277770.08833312.面積換算表平方公里

sq.km.公畝

a.平方米

sq.m平方英尺

sq.ft.平方英寸

sq.in.平方英里

sq.mi.平方碼

sq.yd英畝

a.110000---0.386116-247.1140.000111001076.421550050.000038119.6030.0247110.0000010.01110.76421550.05-1.196030.000247-0.0000920.0928991144-0.1111110.000022-0.0000060.0006450.0069441-0.000771-2.5898825898.8---1-640-0.008360.83609691296-10.0002060.00404640.46714046.7143560-0.001562484013.重量換算表公斤kg.百克hg.克g.噸MT(t.)磅（常衡）lb.盎司（常衡）oz.11010000.0012.2046235.27390.111000.00010.2204623.527390.0010.0110.0000010.0022040.035273100010000-12204.62352740.4535924.53592453.5920.0004531160.0283480.28348728.34870.0000280.062514.容積換算表立方米

cu.m.升

l.立方厘米

cu.cm.立方英尺

cu.ft.立方英寸

cu.in.立方碼

cu.yd.加侖（英）

gal.11000-35.316561027.11.308022200.001110000.03531661.02710.0013080.220.0000010.00110.0000350.0610270.0000010.000220.02831628.316828316.8117280.0370376.229690.0000160.01638616.38620.00057810.0000210.0036040.764511764.51176451127466561168.1910.0045454.4545964545.960.160543277.4230.0059461單

位相

當

于埃0.1納米10-10米納米10埃10-9米靶10-24厘米2特拉斯1韋伯/米2104高斯大氣壓1.013×105牛頓/米2電子伏1.602189×10-19焦耳焦耳10-7爾格6.241461×1018電子伏原子單位931.502兆電子伏克6.02204×1023u5.60956×1032電子伏/c2居里3.7×1010(衰變次數)/秒3.7×1010貝可(Bq)

物理量單位公式

名稱符號名稱符號

質量m千克kgm=pv

溫度t攝氏度°C

速度v米／秒m/sv=s/t

密度p千克／米3kg/m3p=m/v

力（重力）F牛頓（牛）NG=mg

壓強P帕斯卡（帕）PaP=F/S

功W焦耳（焦）JW=Fs

功率P瓦特（瓦）wP=W/t

電流I安培（安）AI=U/R

電壓U伏特（伏）VU=IR

電阻R歐姆（歐）R=U/I

電功W焦耳（焦）JW=UIt

電功率P瓦特（瓦）wP=W/t=UI

熱量Q焦耳（焦）JQ=cm(t-t°)

比熱c焦／（千克°C）J/(kg°C)

真空中光速3×108米／秒

g9.8牛頓／千克

15°C空氣中聲速340米／秒

安全電壓不高于36伏

1.長度換算表公里km.米m.厘米cm.英里mi.海里kt.碼yd.英尺ft.英寸in.110001000000.6213820.5396111093.633280.8939370.70.00111000.0006210.0005391.093633.2808939.37070.000010.0110.0000060.0000050.01093630.0328080.3937071.609311609.3116093110.86896117605280633601.85318531853181.150812025.416076.2172914.60.00091491438391.43830.0005680.00049413360.0003040.30479430.47940.0001890.0001640.3333331120.0000250.0253992.539950.0000150.0000130.0277770.08833312.面積換算表平方公里

sq.km.公畝

a.平方米

sq.m平方英尺

sq.ft.平方英寸

sq.in.平方英里

sq.mi.平方碼

sq.yd英畝

a.110000---0.386116-247.1140.000111001076.421550050.000038119.6030.0247110.0000010.01110.76421550.05-1.196030.000247-0.0000920.0928991144-0.1111110.000022-0.0000060.0006450.0069441-0.000771-2.5898825898.8---1-640-0.008360.83609691296-10.0002060.00404640.46714046.7143560-0.001562484013.重量換算表公斤kg.百克hg.克g.噸MT(t.)磅（常衡）lb.盎司（常衡）oz.11010000.0012.2046235.27390.111000.00010.2204623.527390.0010.0110.0000010.0022040.035273100010000-12204.62352740.4535924.53592453.5920.0004531160.0283480.28348728.34870.0000280.062514.容積換算表立方米

cu.m.升

l.立方厘米

cu.cm.立方英尺

cu.ft.立方英寸

cu.in.立方碼

cu.yd.加侖（英）

gal.11000-35.316561027.11.308022200.001110000.03531661.02710.0013080.220.0000010.00110.0000350.0610270.0000010.000220.0283