공학단위환산표

(1) 길이

단위	cm	m	in	ft	yd	mile	尺	間	町	里
1 cm	1	0.01	0.3937	0.0328	0.0109	-	0.033	0.0055	0.00009	-
1 m	100	1	39.37	3.2808	1.0936	0.0006	3.3	0.55	0.00917	0.00025
1 in	2.54	0.0254	1	0.0833	0.0278	-	0.0838	0.0140	0.0002	-
1 ft	30.48	0.3048	12	1	0.3333	0.00019	1.0058	0.1676	0.0028	-
1 yd	91.438	0.9144	36	3	1	0.0006	3.0175	0.5029	0.0083	0.0002
1 mile	160930	1609.3	63360	5280	1760	1	5310.8	885.12	14.752	0.4098
1 尺	30.303	0.303	11.93	0.9942	0.3314	0.0002	1	0.1667	0.0028	0.00008
1 間	181.818	1.818	71.582	5.965	1.9884	0.0011	6	1	0.0167	0.0005
1 町	10909	109.091	4294.9	357.91	119.304	0.0678	360	60	1	0.0278
1 里	392727	3927.27	154619	12885	4295	2.4403	12960	2160	36	1

(2) 무게

단위	g	kg	ton	그레인	온스	lb	돈	근	관
1 g	1	0.001	0.000001	15.432	0.03527	0.0022	0.26666	0.00166	0.000266
1 kg	1000	1	0.001	15432	33.273	2.20459	266.666	1.6666	0.26666
1 ton	1000000	1000	1	-	35273	2204.59	266666	1666.6	266.666
1 그레인	0.06479	0.00006	-	1	0.00228	0.00014	0.01728	0.00108	0.000017
1 온스	28.3495	0.02835	0.000028	437.4	1	0.06525	7.56	0.0473	0.00756
1 lb	453.592	0.45359	0.00045	7000	16	1	120.96	0.756	0.12096
1 돈	3.75	0.00375	0.000004	57.872	0.1323	0.00827	1	0.00625	0.001
1 근	600	0.6	0.0006	9259.556	21.1647	1.32279	160	1	0.16
1 관	3750	3.75	0.00375	57872	132.28	8.2672	1000	6.25	1

(3) 부피

단위	홉	되	말	㎤	㎥	ℓ	in³	ft³	yd³	gal(美)
1 홉	1	0.1	0.01	180.39	0.00018	0.18039	11.0041	0.0066	0.00023	0.04765
1 되	10	1	0.1	1803.9	0.00180	1.8039	110.041	0.0637	0.00234	0.47656
1 말	100	10	1	18039	0.01803	18.039	1100.41	0.63707	0.02359	4.76567
1 ㎤	0.00554	0.00055	0.00005	1	0.000001	0.001	0.06102	0.00003	0.00001	0.00026
1 ㎥	5543.52	554.325	55.4352	1000000	1	1000	61027	35.3165	1.30820	264.186
1 ℓ	5.54352	0.55435	0.05543	1000	0.001	1	61.027	0.03531	0.00130	0.26418
1 in³	0.09083	0.00908	0.0091	16.387	0.000016	0.01638	1	0.00057	0.00002	0.00432
1 ft³	156.966	15.6666	1.56966	28316.8	0.02831	28.3169	1728	1	0.03703	7.48051
1 yd³	4238.09	423.809	42.3809	764511	0.76451	764.511	46656	27	1	201.974
1 gal	20.9833	2.0983	0.20983	3785.43	0.00378	3.78543	231	0.16368	0.00495	1

(4) 넓이

단위	평방자	평	단보	정보	㎡	a(아르)	ft²	yd²	acre
1평방자	1	0.02778	0.00009	0.000009	0.09182	0.00091	0.98841	0.10982	-
1 평	36	1	0.00333	0.00033	3.3058	0.03305	35.583	3.9537	0.00081
1 단보	10800	300	1	0.1	991.74	9.9174	10674.9	1186.1	0.24506
1 정보	108000	3000	10	1	9917.4	99.174	106794	11861	2.4506
1 ㎡	10.89	0.3025	0.001008	0.0001	1	0.01	10.764	1.1958	0.00024
1 a	1089	30.25	0.10083	0.01008	100	1	1076.4	119.58	0.02471
1 ft²	1.0117	0.0281	0.00009	0.000009	0.092903	0.000929	1	0.1111	0.000022
1 yd²	9.1055	0.25293	0.00084	0.00008	0.83613	0.00836	9	1	0.000207
1 acre	44071.2	1224.2	4.0806	0.40806	4046.8	40.468	43560	4840	1

(※참고 : 1 hectare(헥타르) = 100 are= 10000 ㎡)

(5) 온도

섭씨(℃) → 화씨 (℉)	℉ = {(9/5)×℃}+32
화씨(℉) → 섭씨(℃)	℃ = (5/9) ×(℉-32)

 

 

(1) 길 이

cm	m	in	ft
1	0.01	0.3937	0.03281
100	1	39.37	3.281
2.540	0.0254	1	0.08333
30.48	0.3048	12	1

(2) 면 적

cm²	m²	in²	ft²
1	0.0001	0.155	0.001076
1×10⁴	1	1550	10.76
6.452	0.000645	1	0.006944
929.0	0.09290	144	1

(3) 체 적

cm³	m³	in³	ft³
1	1E-6	0.06102	0.00003531
1E6	1	61020	35.31
16.39	0.00001639	1	0.0005787
28320	0.02832	1728	1

(4) 두 량(斗量)

m³	gal(UK)	gal(US)	ℓ
1	220.0	264.2	1000
0.004546	1	1.201	4.546
0.003785	0.8327	1	3.785
0.001	0.2200	0.2642	1

(注)1gal(US)=231in³,  1ft³=7.48 gal(US)

(5) 질 량

kg	t	lb	ton	sh tn
1	0.001	2.20462	0.0009842	0.0011023
1000	1	2204.62	0.9842	1.1023
0.45359	0.00045359	1	0.0004464	0.00055
1016.05	1.01605	2240	1	1.12
907.185	0.907185	2000	0.89286	1

(注) t:톤, ton: 영국톤(long ton), sh tn :미국톤(short ton)

(6) 밀 도

g/m³	kg/m³	lb/in³	lb/ft³
1	1000	0.03613	62.43
0.001	1	0.00003613	0.06243
27.68	27680	1	1728
0.01602	16.02	0.0005787	1

(注) 1g/cm³= 1t/m³

(7) 힘

N	dyn	kgf	lbf	pdl
1	1E5	0.101972	0.2248	7.233
1E-5	1	1.01972E-6	2.248E-6	7.233E-5
9.80665	9.80665E5	1	2.205	70.93
4.44822	4.44822E5	0.4536	1	32.17
0.138255	1.38255E4	0.01410	0.03108	1

(注) 1 dyn=1E-5N, 1 pdl(파운달) = 1ft·lb/s²

(8) 압 력

kgf/cm²	bar	Pa	atm	mH₂O	mHg	lbf/in²
1	0.980665	0.980665E5	0.9678	10.000	0.7356	14.22
1.0197	1	1E5	0.9869	10.197	0.7501	14.50
1.0197E-5	1E-5	1	0.9869E-5	1.0197E-4	7.501E-6	1.450E-4
1.0332	1.01325	1.01325E5	1	10.33	0.760	14.70
0.10000	0.09806	9.80665E3	0.09678	1	0.07355	1.422
1.3595	1.3332	1.3332E5	1.3158	13.60	1	19.34
0.07031	0.06895	6.895E3	0.06805	0.7031	0.05171	1

(注) 1 Pa = 1 N/m², 1 bar= 1E5 Pa, 1lbf/in²= 1 psi, 1 Pa = 7.5 E-3 torr

(注) 1ksi = 1000psi  (英 ksi : kips per square inch ) 

(9) 응 력

kgf/cm²	kgf/mm²	Pa	N/mm²	lbf/ft²
1	1E-2	0.980665E5	0.0980665	2048
1E2	1	0.980665E7	9.80665	2.048E5
1.0197E-5	1.0197E-7	1	1E-6	0.02089
10.1972	0.101972	1E6	1	2.089E4
0.0004882	4.882E-6	47.86	4.788E-5	1

(注) 1 N/mm²= 1MPa

(10) 속 도

m/s	km/h	kn(미터법)	ft/s	mile/h
1	3.6	1.944	3.281	2.237
0.2778	1	0.5400	0.9113	0.6214
0.5144	1.852	1	1.688	1.151
0.3048	1.097	0.5925	1	0.6818
0.4470	1.609	0.8690	1.467	1

(注) kn : 노트, 미터법 1 노트= 1852 m/h

(11) 점 도

cP	P	Pa·s	kgf·s/m²	lbf·s/in²
1	0.01	0.001	0.00010197	1.449E-7
100	1	0.1	0.0101973	1.449E-5
1000	10	1	0.101973	1.449E-4
9806.65	98.0665	9.80665	1	0.001422
6.9E6	6.9E4	6.9E3	7.03E2	1

(注) 1P= 1dyn·s/cm²= 1g/cm·s, 1Pa·s= 1N·s/m², 1cP=1mPa·s, 1lbf·s/in²= 1Reyn =6.9E6cP

(12) 동점도

cSt	St	m²/s	ft²/s
1	1E-2	1E-6	0.00001076
100	1	1E-4	0.001076
1E6	1E4	1	10.76
92900	929.0	0.09290	1

(注) 1 St = 1 cm²/s

(13) 각속도

rpm	rad/s
1	0.1047
9.549	1

(注) 1 rad=57.296。, rpm= r/min

(14) 체적유량

ℓ/s	ℓ/min	m³/s	m³/min	m³/h	ft³/s
1	60	1E-3	0.06	3600	0.03532
0.01666	1	1.66666E-5	1E-3	6E-2	0.00059
1E3	6E4	1	60	3600	35.31
1.66666E1	1E3	1.66666E-2	1	60	0.5885
2.77777E-4	1.66666E1	2.77777E-4	1.66666E-2	1	0.00981
2.832E1	1.69833E3	2.832E-2	1.69833	101.9	1

(15) 일,에너지 및 열량

J	kgf·m	kW·h	kcal	ft·lbf	Btu
1	0.10197	2.778E-7	2.389E-4	0.7376	9.480E-4
9.807	1	2.724E-6	2.343E-3	7.233	9.297E-3
3.6E6	3.671E5	1	860.0	2.655E6	3413
4186	426.9	1.163E-3	1	3087	3.968
1.356	0.1383	3.766E-7	3.239E-4	1	1.285E-3
1055	107.6	2.930E-4	0.2520	778.0	1

(注) 1J=1W·s, 1kgf·m=9.80665J, 1 W·h = 3600 W·s, 1 cal = 4.18605 J

(16) 일 률

kW	kgf·m/s	PS	HP	kcal/s	ft·lbf/s	Btu/s
1	101.97	1.3596	1.3405	0.2389	737.6	0.9480
9.807E-3	1	1.333E-2	1.315E-2	2.343E-3	7.233	9.297E-3
0.7355	75	1	0.9859	0.1757	542.5	0.6973
0.746	76.07	1.0143	1	0.1782	550.2	0.7072
4.186	426.9	5.691	5.611	1	3087	3.968
1.356E-3	0.1383	1.843E-3	1.817E-3	3.239E-4	1	1.285E-3
1.055	107.6	1.434	1.414	0.2520	778.0	1

(注) W : SI 단위, 1 W=1J/s, 1kgf·m/s=9.80665W, PS:佛마력, HP : 英마력

(17) 열전도율

kcal/m·h·℃	Btu/ft·h·℉	W/(m·K)
1	0.6720	1.163
1.488	1	1.731
0.8600	0.5779	1

(注) W/(m·K) : SI단위, 1 cal(it)=4.1868J

(18) 열전도계수

kcal/m²·h·℃	Btu/ft²·h·℉	J/m²·h·℃	W/(m²·K)
1	0.2048	4187	1.163
4.882	1	2.044E4	5.678
2.389E-4	4.893E-5	1	2.778E-4
0.8598	0.1761	3599	1

(注) W/(m²·K) :SI단위, 1 cal=4.18605 J

(19) 비 열

J/(kg·K)	kcal/(kg·℃)	Btu/(lb·。R)
1	2.38889E-4	2.38889E-4
4.18605E3	1	1

(注) 1 cal = 4.18605 J 참고: 위의 숫자중 "E5"는 "10의5승"을 말합니다.