공학용 단위환산표

[자연의힘]

공학용 단위환산표

길이

단위	mm	cm	m	km	in	feet	yard	mile
mm	1	0.1	0.001	-	0.03937	-	-	-
cm	10	1	0.01	-	0.393701	0.032808	-	-
m	1000	100	1	0.001	39.3701	3.28084	1.09361	-
km	-	-	1000	1	-	3280.84	1093.61	0.621371
in	25.4	2.54	-	-	1	0.083333	0.027778	-
feet	304.8	30.48	0.3048	-	12	1	0.33333	-
yard	914.4	91.44	0.9144	0.000914	36	3	1	0.000568
mile	-	-	1609.344	1.609344	-	5280	1760	1

면적

단위	㎠	㎡	㎢	in²	ft²	yd²	acre	mile²
㎠	1	0.0001	-	0.155	0.001076	0.00012	-	-
㎡	10000	1	0.000001	1550	10.7639	1.19599	0.000247	-
㎢	-	1000000	1	-	-	-	247.105	0.386102
in²	6.4516	0.000645	-	1	0.006944	0.000772	-	-
ft²	929.03	0.092903	-	144	1	0.111111	0.000023	-
yd²	8361.27	0.836127	-	1296	9	1	0.000207	-
acre	-	4046.86	0.004047	-	43560	4840	1	0.001562
mile²	-	-	2.589987	-	-	-	640	1

중량

단위	㎏	ton	lb	UK cwt	UK ton	US cwt	US ton
㎏	1	0.001	2.20462	0.019684	0.000984	0.022046	0.001102
ton	1000	1	2204.62	19.6841	0.984207	22.0462	1.10231
lb	0.453592	0.000454	1	0.008929	0.000446	0.01	0.0005
UK cwt	50.8023	0.050802	112	1	0.05	1.12	0.056
UK ton	1016.05	1.01605	2240	20	1	2204	1.12
US cwt	45.3592	0.045359	100	0.892857	0.044643	1
US ton	907.185	0.907185	2000	17.8571	0.892857	20

부피/용량

단위	㎤	㎥	ltrs(dm³)	in³	ft³	yd³	UK pint	UK gall	US pint	US gall
㎤	1	-	0.001	0.061024	0.0000353	-	0.00176	0.00022	0.002113	0.000264
㎥	-	1	1000	61023.7	35.3147	1.30795	1759.75	219.969	2113.38	264.172
ltrs(dm³)	1000	0.001	1	61.0237	0.035315	0.001308	1.75975	0.219969	2.11338	0.264172
in³	16.3871	0.000016	0.016387	1	0.000579	0.0000214	0.028837	0.003605	0.034632	0.004172
ft³	28316.8	0.028317	28.3168	1728	1	0.037037	49.8307	6.22883	59.8442	7.48052
yd³	764555	0.764555	764.555	46656	27	1	1345.429	168.1784	1615.793	201.974
UK pint	568.261	0.0005683	0.568261	34.6774	0.020068	0.000743	1	0.125	1.20095	0.150119
UK gall	4546.09	0.0045461	4.54609	277.42	0.160544	0.005946	8	1	9.6076	1.20095
US pint	473.176	0.0004732	0.473176	28.875	0.01671	0.000619	0.832674	0.104084	1	0.125
US gall	3785.41	0.0037854	3.785411	231	0.133681	0.004951	6.661392	0.832674	8	1

부피/유속

단위	ltrs/sec	ltrs/h	㎥/sec	㎥h	cfm	ft³/h	UK gall/m	UK gall/h	US gall/m	US gal/h
ltrs/sec	1	3600	0.001	3.6	2.118882	127.133	13.19814	791.8884	15.85032	951.019
ltrs/h	0.000278	1	-	0.001	0.00588	0.035315	0.003666	0.219969	0.004403	0.264172
㎥/sec	1000	3600000	1	3600	2118.88	127133	13198.1	791889	1585	0.3951019
㎥h	0.277778	1000	0.000278	1	0.588578	35.3147	3.66615	219.969	4.402863	264.1718
cfm	0.471947	1699.017	0.000472	1.699017	1	60	6.228833	373.73	7.480517	448.831
ft³/h	0.007866	28.3168	-	0.028317	0.016667	1	0.103814	6.228833	0.124675	7.480517
UK gall/m	0.075768	272.766	0.0000758	0.0272766	0.160544	9.63262	1	60	1.20095	72.057
UK gall/h	0.001263	4.54609	-	0.004546	0.002676	0.160544	0.016667	1	0.020016	1.20095
US gall/m	0.06309	227.125	0.0000758	0.227125	0.133681	8.02832	0.832674	49.96045	1	60
US gal/h	0.001052	3.785411	-	0.003785	0.002228	0.133681	0.013878	0.832674	0.016667	1

압력

단위	atmos	mmHg	bar	pascal	inH₂O	inHg	psi	㎏/㎠
atmos	1	760	1.0132	101325	406.781	29.9213	14.6959	1.033
mmHg	0.0013158	1	0.001333	133.322	0.53524	0.03937	0.019337	0.00136
bar	0.9869	750.062	1	100000	401.463	29.53	14.504	1.01957
pascal	0.0000099	0.007501	0.00001	1	0.004015	0.000295	0.000145	0.00001
inH₂O	0.0024583	1.86832	0.002491	249.089	1	0.073556	0.036127	0.00254
inHg	0.033421	25.4	0.033864	3386.391	3.5951	1	0.491154	0.003452
psi	0.068046	51.7149	0.068948	6894.76	27.6799	2.03602	1	0.07029
㎏/㎠	0.968	7835.72	0.9808	98088	393.786	28.965	14.226	1

1 kgf/cm2 = 10,000 kgf/m²= 10 mH2O
1 MPa=10^6 N/m²= 101971.6 kgf/m2 = 10.19716 kgf/cm2

열

단위	Btu/h	w	㎉/h	kw
Btu/h	1	0.293017	0.251996	0.000293
w	3.41214	1	0.859845	0.001
㎉/h	3.96832	1.163	1	0.001163
kw	3462.14	1000	589.845	1

에너지

단위	Btu	Therm	J	KJ	㎈
Btu	1	0.00001	1055.06	1.055	251.996
Therm	100000	1	-	105.5	25199.60
J	0.00094	-	1	0.001	0.2388
KJ	0.9478	9.478E-06	1000	1	238.85
㎈	0.0039683	0.0039683x105	4.1868	-	1

비열

단위	Btu/lb ℉	J/㎏℃
Btu/lb ℉	1	4186.8
J/㎏℃	0.00023	1

1㎉/㎏℃= 1 Btu/lb ℉

열용량

단위	Btu/lb	J/㎏
Btu/lb	1	2.326
J/㎏	0.4299	1

전열계수

단위	Btu/ft²h℉	w/㎡℃	㎉/㎡h℃
Btu/ft²h℉	1	5.67826	4.88243
w/㎡℃	0.17611	1	0.859845
㎉/㎡h℃	0.204816	1.163	1

전열속도

단위	Btu/ft²h	w/㎡	㎉/㎡h
Btu/ft²h	1	3.154	2.712
w/㎡	0.3169	1	0.859
㎉/㎡h	0.368	1.163	1

선속도

단위	ft/m	ft/sec	m/sec
ft/m	1	0.016666	0.00508
ft/sec	m/sec 60	1	0.3048
m/sec	196.85	3.28084	1

점도

단위	pa·s	㎏f·s/㎡	g/cm·s(p)	㎏m·h	lbf·s/ft²
pa·s	1	0.10197	10	3.6x10³	2.089x10­²
㎏f·s/㎡	9.80665	1	98.07	3.53x10⁴	0.20481
g/cm·s(p)	0.1	1.020x10­²	1	360	2.089x10­³
㎏m·h	2.778x10.­⁴	2.833x10­5	2.778x10­³	1	5.80x10­6
lbf·s/ft²	47.88		478.8	1.724x105	1

동점도

단위	㎡ /sec	㎠/s(st)	㎡/h	ft²/sec	ft²/h
㎡ /sec	1	1x10­⁴	3.6x10³	10.764	3.875x10⁴
㎠/s(st)	1x10­⁴	1	0.36	1.0764x10­³	3.785
㎡/h	2.778x10­⁴	2.778	1	2.990x10­³	10.764
ft²/sec	9.290x10­²	929	334.4	1	3.6x10³
ft²/h	2.581x10­5	0.2581	9.29x10­²	2.778x10­⁴	1

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