공학의 단위 환산.

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 단위 환산표      
 

(1) 길이	(2) 면적(넓이)	(3) 부피(체적)	(3-2) 부피(두량)
(4) 무게(질량)	(5) 밀도	(6) 힘	(7) 압력
(8) 응력	(9) 속도	(10) 각속도	(11) 점도
(12) 동점도	(13) 체적유량	(14) 일,에너지 및 열량	(15) 일률
(16) 열전도율	(17) 열전도계수

압력 단위 환산 

 

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

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2. 면적(넓이)

단위 평방자 평 단보 정보 ㎡ a(아르) ft² yd² acre 1 평방자 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 ㎡)

 

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3-1. 부피(체적)

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(美) 20.9833 2.0983 0.20983 3785.43 0.00378 3.78543 231 0.16368 0.00495 1

 

3-2. 부피(두량/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

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

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4-1. 무게(질량)

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

 

4-2. 무게(질량)

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

(참고) t : 톤,  ton : 영국 톤(long ton),  sh tn : 미국 톤(short ton)

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5. 밀도

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

  (참고) 1g/cm³= 1t/m³

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6. 힘

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

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

 

7-1. 압력1

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

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

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7-2. 압력2

	kPa	bar	psi	kgf/cm²	mmH₂O	in H₂O	ft H₂O	mmHg	in Hg	torr
kPa	1	0.01	0.14504	0.01020	101.972	4.01463	0.33455	7.50064	0.29530	7.50064
bar	100	1	14.5038	1.01972	10197.2	401.463	33.4552	750.064	29.5300	750.064
psi	6.89476	0.06895	1	0.07031	703.070	27.6799	2.30666	51.7151	2.03602	51.7151
kgf/cm²	98.0665	0.98067	14.2233	1	10000	393.701	32.8084	735.561	28.9590	735.561
mmH₂O	0.00981	0.00010	0.00142	0.00010	1	0.03937	0.00328	0.07356	0.00290	0.07356
in H₂O	0.24909	0.00249	0.03613	0.00254	25.4	1	0.08333	1.86833	0.07356	1.86833
ft H₂O	2.98907	0.02989	0.43353	0.03048	304.800	12.000	1	22.4199	0.88267	22.4199
mmHg	0.13332	0.00133	0.01934	0.00136	13.5951	0.53524	0.04460	1	0.03937	1
in Hg	3.38639	0.03386	0.49115	0.03453	345.316	13.5951	1.13202	25.4001	1	25.4001
torr	0.13332	0.00133	0.01934	0.00136	13.5951	0.53524	0.04460	1	0.03937	1

 

 

8. 응력

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

 (참고) 1 N/mm²= 1MPa

 

9. 속도

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

 (참고) kn : 노트, 미터법 1 노트= 1852 m/h

 

10. 각속도

rpm rad/s rpm 1 0.1047 rad/s 9.549 1

 (참고) 1 rad=57.296。, rpm= r/min

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11. 점도

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

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

(참고) 1 St = 1 cm²/s 

 

13. 체적 유량

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

 

14. 일, 에너지 및 열량

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

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

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15. 일률

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

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

 

16. 열전도율

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

(참고) W/(m·K) : SI단위, 1 cal(it)=4.1868J

 

17. 열전도계수

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

(참고) W/(m²·K) : SI단위, 1 cal=4.18605 J

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