تحویلِ اکائیات اصل میں ایک ہی مقدار کے لیے مختلف پیمائشی اکائیوں کے جز و ضربی (factor) کی تبدیلی ہے۔
مختلف اکائیوں میں کسی مقدار کی قیمت معلوم کرنے کے لیے تحویلِ اکائیات کا عمل استعمال کیا جاتا ہے۔
ترمیم
رقبہ
اکائی کا نام
علامت
وضاحت
ایس.آئی اکائیوں سے تعلق
ایکڑ ac
≡ 10 sq ch = 4840 sq yd
= 4046.856 422 4 m²
ہیکٹئیر ha
≡ 10 000 m²
= 10 000 m²
مربع فٹ sq ft
≡ 1 ft × 1 ft
= 9.290 304 × 10−2 m²
مربع انچ sq in
≡ 1 in × 1 in
= 6.4516 × 10−4 m²
مربع کلومیٹر km²
≡ 1 km²
= 106 m²
مربع میٹر (ایس۔ آئی اکائی)m²
≡ 1 m × 1 m
= 1 m²
مربع میل ; جُزء
sq mi
≡ 1 mi × 1 mi
= 2.589 988 110 336 × 106 m²
مربع گز sq yd
≡ 1 yd × 1 yd
= 0.836 127 36 m²
حجم
اکائی کا نام
علامت
علامت
ایس.آئی اکائیوں سے تعلق
ایکڑ فٹ ac ft
≡ 1 ac x 1 ft = 43560 ft³
= 1 233.481 837 547 52 m³
مکعب میٹر (ایس۔ آئی اکائی)m³
≡ 1 m × 1 m × 1 m
= 1 m³
لیٹر L
≡ 1 dm³ [3]
= 0.001 m³
لیمبڈا λ
≡ 1 mm³
= 1 × 10−9 m³
قطرہ (اعشاری)
≡ 1/20 mL
= 50.0 × 10−9 m³
چائے کا چمچ (اعشاری)
≡ 5.0 × 10−6 m³
مکعب انچ
cu in
≡ 1 in × 1 in × 1 in
= 16.387 064 × 10−6 m³
پیالہ (اعشاری)
c
≡ 250.0 × 10−6 m³
مکعب فٹ cu ft
≡ 1 ft × 1 ft × 1 ft
= 0.028 316 846 592 m³
بیرل (پٹرولیم)
bl; bbl
≡ 42 gal (US)
= 0.158 987 294 928 m³
پاؤ
≡ 8 bu (Imp)
= 0.290 949 76 m³
مکعب گز
cu yd
≡ 27 cu ft
= 0.764 554 857 984 m³
مکعب میل
cu mi
≡ 1 mi × 1 mi × 1 mi
= 4 168 181 825.440 579 584 m³
نوٹ: کمیت/وزن میں فرق اور تبدیلی کے لیے وزن ملاحظہ کیجئے۔
وقت , t
اکائی کا نام
علامت
وضاحت
ایس.آئی اکائیوں سے تعلق
ثانیہ (سیکنڈ)s
time of 9192631770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 K (but other seconds are sometimes used in astronomy)
(ایس آئی بنیادی اکائیاں )
Planck time
≡ (G ℏ c 5 )½
≈ 1.351 211 818 × 10−43 s
atomic unit of time au
≡ a0 /(α ·c)
≈ 2.418 884 254 × 10−17 s
svedberg S
≡ 10−13 s
= 100 fs
shake
≡ 10−8 s
= 10 ns
sigma
≡ 10−6 s
= 1 μs
jiffy
≡ 1/60 s
≈ .016667 s
jiffy (alternate)
≡ 1/100 s
= 10 ms
helek
≡ 1/1080 h
≈ 3.333333 s
minute min
≡ 60 s
milliday md
≡ 86 400 s / 1000
≡ 86.4 s
moment
≡ 90 s
≡ 90 s
ke (traditional)
≡ 1/100 d
≡ 864 s
quarter (of an hour)
ke
≡ 1/96 d
≡ 900 s
گھنٹہ h
≡ 60 min
= 3600 s
دن d
≡ 24 h
= 86 400 s
ہفتہ wk
≡ 7 d
= 604 800 s
پندرہ روزہ
≡ 2 wk
= 1 209 600 s
مہینا (hollow)mo
≡ 29 d
= 2 505 600 s
مہینا mo
≡ 30 d
= 2 592 000 s
مہینا (full)mo
≡ 31 d
= 2 678 400 s
year (Calendar)a, y, or yr
≡ 365 d
= 31 536 000 s
year (Gregorian)a, y, or yr
≡ 365.2425 d
= 31 556 952 s
year (Julian)a, y, or yr
≡ 365.25 d
= 31 557 600 s
کوکبی سال a, y, or yr
≡ time taken for Sun to return to the same position with respect to the stars of the celestial sphere = 365.256363 d
= 31 558 149.76 s
Olympiad
≡ 4 a of 365 d
= 1.2614 × 108 s
lustre; lustrum
≡ 5 a of 365 d
= 1.5768 × 108 s
octaeteris
≡ 8 a of 365 d
= 2.522 88 × 108 s
عشرہ
≡ 10 a of 365 d
= 3.1536 × 108 s
enneadecaeteris ; Metonic cycle
≡ 110 mo (hollow) + 125 mo (full) = 19 a of 365 d
= 5.996 16 × 108 s
Callippic cycle
≡ 441 mo (hollow) + 499 mo (full) = 76 a of 365.25 d
= 2.398 377 6 × 109 s
صدی (Calendar)
≡ 100 a of 365 d
= 3.1536 × 109 s
صدی (Julian)
≡ 100 a of 365.25 d
= 3.155 76 × 109 s
Hipparchic cycle
≡ 4 Callippic cycles - 1 d
= 9.593 424 × 109 s
millennium (Calendar)
≡ 1000 a of 365 d
= 3.1536 × 1010 s
millennium (Gregorian)
≡ 1000 a of 365.2425 d
= 3.155 695 2 × 1010 s
millennium (Julian)
≡ 1000 a of 365.25 d
= 3.155 76 × 1010 s
دور شعریٰ یمانی
≡ 1461 a of 365 d
= 4.607 409 6 × 1010 s
A velocity consists of a speed combined with a direction; the speed part of the velocity takes units of speed.
See also: Conversion between weight (force) and mass
دباؤ
اکائی کا نام
علامت
وضاحت
تعلق بین الاقوامی نظام اکائیات
atmosphere (standard)atm
≡ 101 325 Pa [7]
atmosphere (technical)at
≡ 1 kgf/cm²
= 9.80665 × 104 Pa [7]
bar bar
≡ 105 Pa
barye (cgs unit )
≡ 1 dyn/cm²
= 0.1 Pa
centimetre of mercury
cmHg
≡ 13 595.1 kg/m³ × 1 cm × g
≈ 1.333 22 × 103 Pa [7]
centimetre of water (4 °C)
cmH2 O
≈ 999.972 kg/m³ × 1 cm × g
≈ 98.0638 Pa [7]
foot of mercury (conventional)ftHg
≡ 13 595.1 kg/m³ × 1 ft × g
≈ 40.636 66 × 103 Pa [7]
foot of water (39.2 °F)ftH2 O
≈ 999.972 kg/m³ × 1 ft × g
≈ 2.988 98 × 103 Pa [7]
پور of mercury (conventional)inHg
≡ 13 595.1 kg/m³ × 1 in × g
≈ 3.386 389 × 103 Pa [7]
پور of water (39.2 °F)inH2 O
≈ 999.972 kg/m³ × 1 in × g
≈ 249.082 Pa [7]
kilogram-force per square millimetre
kgf/mm²
≡ 1 kgf/mm²
= 9.806 65 × 106 Pa [7]
kip per square پور ksi
≡ 1 kipf/sq in
≈ 6.894757 × 106 Pa [7]
micron (micrometre) of mercury
μ
{\displaystyle \mu }
≡ 13 595.1 kg/m³ × 1
μ
{\displaystyle \mu }
g ≈ 0.001 torr
≈ 0. 133 322 4 Pa [7]
millimetre of mercury mmHg
≡ 13 595.1 kg/m³ × 1 mm × g ≈ 1 torr
≈ 133.322 4 Pa [7]
millimetre of water (3.98 °C)
mmH2 O
≈ 999.972 kg/m³ × 1 mm × g = 0.999972 kgf/m²
= 9.806 38 Pa
پاسکل (SI unit)Pa
≡ N/m² = kg/(m·s²)
= 1 Pa [8]
pièze (mts unit)
pz
≡ 1000 kg/m·s²
= 1 × 103 Pa = 1 kPa
رطل per square foot psf
≡ 1 lbf/ft²
≈ 47.880 25 Pa [7]
poundal per square foot pdl/sq ft
≡ 1 pdl/sq ft
≈ 1.488 164 Pa [7]
پاؤنڈ فی مربع انچ psi
≡ 1 lbf/in²
≈ 6.894 757 × 103 Pa [7]
short ton per square foot
≡ 1 sh tn × g / 1 sq ft
≈ 95.760 518 × 103 Pa
torr torr
≡ 101 325/760 Pa
≈ 133.322 4 Pa [7]
توانائی
اکائی کا نام
علامت
وضاحت
تعلق بین الاقوامی نظام اکائیات
جول (SI unit)J
≡ m·N = W·s = V·A·s = kg·m²/s²
= 1 J
electronvolt eV
≡ e
≈ 1.602 176 × 10−19 J
rydberg Ry
≡ R∞ ℎ ·c
≈ 2.179 872 × 10−18 J
hartree , atomic unit of energy Eh
≡ me ·α ²·c
≈ 4.359 744 × 10−18 J
erg (cgs unit )erg
≡ 1 g·cm²/s²
= 10−7 J
foot -poundalft pdl
≡ 1 lb·ft²/s²
= 4.214 011 009 380 48 × 10−2 J
cubic centimetre of atmosphere ; standard cubic centimetre
cc atm; scc
≡ 1 atm × 1 cm³
= 0.101 325 J
inch-pound force in lbf
≡ g × 1 lb × 1 in
= 0.112 984 829 027 616 7 J
foot-pound force ft lbf
≡ g × 1 lb × 1 ft
= 1.355 817 948 331 400 4 J
calorie (20 °C)cal20 °C
≈ 4.1819 J
calorie (thermochemical)calth
≡ 4.184 J
calorie (15 °C)cal15 °C
≡ 4.1855 J
calorie (International Table)calIT
≡ 4.1868 J
calorie (mean)calmean
≈ 4.190 02 J
calorie (3.98 °C)cal3.98 °C
≈ 4.2045 J
kilocalorie; large calorie
kcal; Cal
≡ 1000 calIT
= 4.1868 × 103 J
لٹر -atmosphere l atm; sl
≡ 1 atm × 1 L
= 101.325 J
gallon -atmosphere (US)US gal atm
≡ 1 atm × 1 gal (US)
= 383.556 849 013 8 J
gallon -atmosphere (imperial)imp gal atm
≡ 1 atm × 1 gal (imp)
= 460.632 569 25 J
British thermal unit (thermochemical)
BTUth
≈ 1.054 350 × 103 J
British thermal unit (ISO)
BTUISO
≡ 1.0545 × 103 J
British thermal unit (63 °F)
BTU63 °F
≈ 1.0546 × 103 J
British thermal unit (60 °F)
BTU60 °F
≈ 1.054 68 × 103 J
British thermal unit (59 °F)
BTU59 °F
≡ 1.054 804 × 103 J
British thermal unit (International Table)
BTUIT
= 1.055 055 852 62 × 103 J
British thermal unit (mean)
BTUmean
≈ 1.055 87 × 103 J
British thermal unit (39 °F)
BTU39 °F
≈ 1.059 67 × 103 J
Celsius heat unit (International Table)CHUIT
≡ 1 BTUIT × 1 K/°R
= 1.899 100 534 716 × 103 J
cubic foot of atmosphere; standard cubic foot
cu ft atm; scf
≡ 1 atm × 1 ft³
= 2.869 204 480 934 4 × 103 J
cubic گز of atmosphere; standard cubic گز
cu yd atm; scy
≡ 1 atm × 1 yd³
= 77.468 520 985 228 8 × 103 J
cubic foot of natural gas
≡ 1000 BTUIT
= 1.055 055 852 62 × 106 J
horsepower -گھنٹہ hp·h
≡ 1 hp × 1 h
= 2.684519537696172792 × 106 J
kilowatt-hour ; Board of Trade UnitkW·h; B.O.T.U.
≡ 1 kW × 1 h
= 3.6 × 106 J
thermie
th
≡ 1 McalIT
= 4.1868 × 106 J
therm (U.S.)
≡ 100 000 BTU59 °F
= 105.4804 × 106 J
therm (E.C.)
≡ 100 000 BTUIT
= 105.505 585 262 × 106 J
ton of Trinitrotoluene tTNT
≡ 1 Gcalth
= 4.184 × 109 J
barrel of oil equivalent bboe
≈ 5.8 ×106 BTU59 °F
≈ 6.12 × 109 J
ton of coal equivalent TCE
≡ 7 Gcalth
= 29.3076 × 109 J
ton of oil equivalent TOE
≡ 10 Gcalth
= 41.868 × 109 J
quad
≡ 1015 BTUIT
= 1.055 055 852 62 × 1018 J
طاقت
اکائی کا نام
علامت
وضاحت
تعلق بین الاقوامی نظام اکائیات
watt (SI unit)W
≡ J/s = N·m/s = kg·m²/s³
= 1 W
lusec
lusec
≡ 1 L·µmHg/s [9]
≈ 1.333 × 10−4 W
foot -pound-force per گھنٹہ ft lbf/h
≡ 1 ft lbf/h
≈ 3.766 161 × 10−4 W
atmosphere cubic centimetre per minute
atm ccm
≡ 1 atm × 1 cm³/min
= 1.688 75 × 10−3 W
foot -pound-force per minute ft lbf/min
≡ 1 ft lbf/min
= 2.259 696 580 552 334 × 10−2 W
atmosphere–cubic centimetre per second
atm ccs
≡ 1 atm × 1 cm³/s
= 0.101 325 W
BTU (International Table) per گھنٹہ
BTUIT /h
≡ 1 BTUIT /h
≈ 0.293 071 W
atmosphere–cubic foot per گھنٹہ
atm cfh
≡ 1 atm × 1 cu ft/h
= 0.797 001 244 704 W
foot -pound-force per second ft lbf/s
≡ 1 ft lbf/s
= 1.355 817 948 331 400 4 W
لٹر -atmosphere per minute L·atm/min
≡ 1 atm × 1 L/min
= 1.688 75 W
calorie (International Table) per second calIT /s
≡ 1 calIT /s
= 4.1868 W
BTU (International Table) per minute
BTUIT /min
≡ 1 BTUIT /min
≈ 17.584 264 W
atmosphere-cubic foot per minute
atm·cfm
≡ 1 atm × 1 cu ft/min
= 47.820 074 682 24 W
square foot equivalent direct radiation
sq ft EDR
≡ 240 BTUIT /h
≈ 70.337 057 W
litre-atmosphere per second
L·atm/s
≡ 1 atm × 1 L/s
= 101.325 W
horsepower (metric)hp
≡ 75 m kgf/s
= 735.498 75 W
horsepower (European electrical)hp
≡ 75 kp·m/s
= 736 W
horsepower (Imperial mechanical)hp
≡ 550 ft lbf/s
= 745.699 871 582 270 22 W
horsepower (Imperial electrical)hp
≡ 746 W
ton of air conditioning
≡ 1 t × 1005 J/kg × 1 °R/K ÷ 10 min
≈ 844.2 W
poncelet p
≡ 100 m kgf/s
= 980.665 W
BTU (International Table) per second
BTUIT /s
≡ 1 BTUIT /s
= 1.055 055 852 62 × 103 W
atmosphere-cubic foot per second
atm cfs
≡ 1 atm × 1 cu ft/s
= 2.869 204 480 934 4 × 103 W
ton of refrigeration (IT)
≡ 1 BTUIT × 1 sh tn/lb ÷ 10 min/s
≈ 3.516 853 × 103 W
ton of refrigeration (Imperial)
≡ 1 BTUIT × 1 lng tn/lb ÷ 10 min/s
≈ 3.938 875 × 103 W
boiler horsepower
bhp
≈ 34.5 lb/h × 970.3 BTUIT /lb
≈ 9.810 657 × 103 W
Capacitor 's Ability to Store Charge
اکائی کا نام
علامت
وضاحت
تعلق بین الاقوامی نظام اکائیات
فیریڈ
F
amount of capacitance for which a potential difference of one volt results in a static charge of one coulomb
=
A
⋅
s
V
=
C
V
=
C
2
J
=
C
2
N
⋅
m
=
s
2
⋅
C
2
m
2
⋅
kg
=
s
4
⋅
A
2
m
2
⋅
kg
{\displaystyle =\mathrm {\frac {A\cdot s}{V}} ={\dfrac {\mbox{C}}{\mbox{V}}}={\dfrac {{\mbox{C}}^{2}}{\mbox{J}}}={\dfrac {{\mbox{C}}^{2}}{{\mbox{N}}\cdot {\mbox{m}}}}={\dfrac {{\mbox{s}}^{2}\cdot {\mbox{C}}^{2}}{{\mbox{m}}^{2}\cdot {\mbox{kg}}}}={\dfrac {{\mbox{s}}^{4}\cdot {\mbox{A}}^{2}}{{\mbox{m}}^{2}\cdot {\mbox{kg}}}}}
Electromotive force
ترمیم
Electrical resistance
ترمیم
Kinematic viscosity
ترمیم
درمائلت (اطلاعاتی نظریہ)
اکائی کا نام
علامت
وضاحت
Relation to SI units
SI unit
J/K
≡ J/K
= 1 J/K
nat ; nip; nepitnat
≡ kB
= 1.3806505(23) × 10−23 J/K
بٹ (کمپیوٹر) ; shannonbit; b; Sh
≡ ln(2) × kB
= 9.569940(16) × 10−24 J/K
ban ; hartleyban; Hart
≡ ln(10) × kB
= 3.1790653(53) × 10−23 J/K
nibble
≡ 4 bits
= 3.8279760(64) × 10−23 J/K
byte B
≡ 8 bits
= 7.655952(13) × 10−23 J/K
kilobyte (decimal)kB
≡ 1000 B
= 7.655952(13) × 10−20 J/K
kilobyte (بائٹ )KB; KiB
≡ 1024 B
= 7.839695(13) × 10−20 J/K
Often, information entropy is measured in shannons, whereas the (discrete) storage space of digital devices is measured in bits. Thus, uncompressed redundant data occupy more than one bit of storage per shannon of information entropy. The multiples of a bit listed above are usually used with this meaning. Other times the bit is used as a measure of information entropy and is thus a synonym of shannon.
Note: see Temperature conversion for more detail
Radioactivity - absorbed dose
ترمیم
Radioactivity - equivalent dose
ترمیم
↑ "NIST Reference on Constants, Units, and Uncertainty." (2006). National Institute of Standards and Technology . Accessed 22 February 2008.
^ ا ب
↑ Barry N. Taylor, Ed.,NIST Special Publication 330: The International System of Units (SI) آرکائیو شدہ بذریعہ physics.nist.gov (2001 Edition), Washington: U.S. Government Printing Office, 43,"The 12th Conference Generale des Poids et Mesures (CGPM)…declares that the word “liter” may be employed as a special name for the cubic decimeter".
↑ CODATA Value: atomic uint of mass. National Institute of Standards and Technology . Retrieved 16 September 2008.↑ Lide, 1990, p. 14-35.
↑ CODATA Value: atomic unit of force National Institute of Standards and Technology . Retrieved 14 September 2008.^ ا ب پ ت ٹ ث ج چ ح خ د ڈ ذ ر ڑ ز Barry N. Taylor, (April 1995), Guide for the Use of the International System of Units (SI)
↑ Barry N. Taylor, (April 1995), Guide for the Use of the International System of Units (SI) (NIST Special Publication 811), Washington, DC: U.S. Government Printing Office, p. 5.
↑ Russ Rowlett. (2005). How Many: A Dictionary of Units of Measure . Viewed 5 نومبر 2006 at http://www.unc.edu/~rowlett/units/ آرکائیو شدہ بذریعہ unc.edu
↑ Ambler Thompson & Barry N. Taylor. (2008). Guide for the Use of the International System of Units (SI) .National Institute of Standards and Technology . p. 10.
↑ Ambler Thompson & Barry N. Taylor. (2008). Guide for the Use of the International System of Units (SI) .National Institute of Standards and Technology . p. 5.
Klein, Herbert. 1988. The science of measurement: A historical survey . New York: Dover Publications. 
