Area conversion 1 square kilometer ( km2 ) = 100 hectares ( ha ) = 247.1 acres ( acre ) = 0.386 square miles ( mile2 ) 1 square meter ( m2 ) = 10.764 square feet ( ft2 ) 1 square inch ( in2 ) = 6.452 square centimeters ( cm2 ) 1 hectare ( ha ) = 10,000 square meters ( m2 ) = 2.471 acres ( acre ) 1 acre ( acre ) = 0.4047 ha ( ha ) = 4.047 × 10-3 sq km ( km2 ) = 4047 sqm ( m2 ) 1 acre ( acre ) = 0.4047 ha ( ha ) = 4.047 × 10-3 sq km ( km2 ) = 4047 sqm ( m2 ) 1 square foot ( ft2 ) = 0.093 square meters (m2) 1 square meter ( m2 ) = 10.764 square feet ( ft2 ) 1 square yard ( yd2 ) = 0.8361 square meters ( m2 ) 1 square mile ( mile2 ) = 2.590 square kilometers ( km2 ) Length conversion 1 km ( km ) = 0.621 mile ( mile ) 1 meter ( m ) = 3.281 feet ( ft ) = 1.094 yards ( yd ) 1 cm ( cm ) = 0.394 inch ( in ) 1 inch ( in ) = 2.54 cm ( cm ) 1 nmile ( mile ) = 1.852 km ( km ) 1 Yingxun ( fm ) = 1.829 ( m ) 1 yard ( yd ) = 3 feet ( ft ) 1 rod ( rad ) = 16.5 feet ( ft ) 1 mile = 1.609 km km 1 ft = 12 inches in 1 mile (mile) = 5280 feet (ft) 1 nautical miles (n mile) = 1.1516 miles (Mile) Quality conversion 1 long ton = 1.016 tons (t ) 1 kg (kg ) = 2.205 pounds (lb ) 1 pound (lb ) = 0.454 kg (kg ) [ equal ] 1 oz (oz ) = 28.350 g (g) 1 short ton (sh.ton ) = 0.007 tons (t ) = 2000 pounds (lb ) 1 t ( t ) = 1000 kg ( kg ) = 2205 pounds ( lb ) = 1.102 short tons ( sh.ton ) = 0.984 long tons ( long ton ) Density conversion 1 lbs / ft 3 (lb / ft3) = 16.02 kg / m 3 (kg / m3) API degree = specific gravity at 141.5/15.5 °C - 131.5 1 lbs / gal England (lb / gal) = 99.776 kg / m 3 (kg / m3) 1 Baume Density ( B ) = Specific Gravity at 140/15.5 °C - 130 1 lbs / inch 3 (lb / in3) = 27679.9 kg / m 3 (kg / m3) 1 lbs / US gallon (lb / gal) = 119.826 kg / m 3 (kg / m3) 1 lbs / (petroleum) barrel (lb / bbl) = 2.853 kg / m 3 (kg / m3) 1 kg / m 3 (kg / m3) = 0.001 g / cm 3 (g / cm3) = 0.0624 lbs / ft 3 (lb / ft3) Force value conversion 1 Newton ( N ) = 0.225 pounds force ( lbf ) = 0,102 kilograms force ( kgf ) 1 kg force ( kgf ) = 9.81 N ( N ) 1 lbf ( lbf ) = 4.45 Newtons ( N ) 1 dyne ( dyn ) = 10-5 Newtons ( N ) Temperature conversion K = 5/9 (° F+459.67 ) K= °C +273.15 n °C = (5/9 • n+32) ° F n ° F = [(n-32) × 5/9] °C 1 ° F = 5/9 °C (temperature difference) Heat transfer coefficient conversion 1 kcal / m 2 • when (kcal / m2 • h) = 1.16279 W / m 2 (w / m2) 1 kcal / (m 2 • • ℃) [1kcal / (m2 • h • ℃ ) ] = 1.16279 W / (m 2 • Kelvin) [w / (m2 • K)] 1 BTU / (ft 2 • • ° F) [Btu / (ft2 • h • ° F) ] = 5.67826 W / (m 2 • Kelvin) [(w / m2 • K)] 1 meter 2 • • ℃ / kcal (m2 • h • ℃ / kcal ) = 0.86000 yards 2 • Kelvin / watt (m2 • K / W) Thermal conductivity conversion 1 kcal ( m · h • °C) [ kcal/(m • h • °C ) ] = 1.16279 watts / (m. Kelvin) [ W/(m • K) ] 1 BTU / (ft•hour•° F ) [ But/(ft • h •° F) = 1.7303 W / (m•Kelvin) [ W/(m • K) ] Specific heat conversion 1 kcal / (kilogram•°C)[ kcal/(kg •°C ) ]= 1 BTU / (lb•° F )[ Btu/(lb •° F) ] = 4186.8 joules / (kg / Kelvin) [ J / ( kg • K )] Heat work conversion 1 card ( cal ) = 4.1868 joules ( J ) 1 large card = 4186.75 joules ( J ) 1 kg of force ( kgf • m ) = 9.80665 joules ( J ) 1 British thermal unit ( Btu ) = 1055.06 joules ( J ) 1 kWh ( kW • h ) = 3.6 × 106 Joules ( J ) 1 foot pounds force ( ft • lbf ) = 1.35582 joules ( J ) 1 metric hp hour ( hp • h ) = 2.64779 × 106 joules ( J ) 1 hrh ( UKHp • h ) = 2.68452 × 106 joules 1 Joule = 0.10204 kg • m = 2.778 × 10 - 7 kWh = 3.777 x 10 - 7 metric hp hours = 3.723 × 10 - 7 inches of horsepower hours = 2.389 × 10 - 4 kcal =9.48 x 10 - 4 BTUs Power conversion 1 British thermal unit / hour ( Btu/h ) = 0.293071 watts ( W ) 1 kgfm / s ( kgf • m/s ) = 9.80665W ( w ) 1 card / second ( cal/s ) = 4.1868 watts ( W ) 1 metric horsepower ( hp ) = 735.499 watts ( W ) Speed ​​conversion 1 mile / h (mile / h) = 0.44704 m / s (m / s) 1 foot / second ( ft/s ) = 0.3048 meters / second ( m/s ) Oil and gas production conversion 1 barrel ( bbl ) = 0.14 tons ( t ) (crude oil, global average) 1 trillion cubic feet per day ( tcfd ) = 28.32 billion cubic meters per day ( m3/d ) = 10.336 trillion cubic meters per year ( m3/a ) One billion cubic feet per day ( bcfd ) = 0.2832 billion cubic meters per day ( m3/d ) = 10.336 billion cubic meters per year ( m3/a ) 1 million cubic feet per day ( MMcfd ) = 28,032 cubic meters per day ( m3/d ) = 10,335,500 cubic meters per year ( m3/a ) 1 000 cubic feet / day ( Mcfd ) = 28.32 m3 / day ( m3/d ) = 10,336 thousand meters / year ( m3/a ) 1 barrel / day ( bpd ) = 50 tons / year ( t/a ) (crude oil, global average) 1 t ( t ) = 7.3 barrels ( bbl ) ( crude oil, global average ) A pressure of 1 bar (bar) = 100000 Pa (Pa) 1 dyne / cm 2 (dyn / cm2) = 0.1 Pa (Pa) 1 torr (Torr) = 133.322 Pa (Pa) 1 millimeters of mercury (mmHg) = 133.322 Pa (Pa) 1 mm water column ( mmH2O ) = 9.80665 Pa ( Pa ) 1 project atmospheric pressure = 98.0665 kPa ( kPa ) 1 kilopascals (kPa) = 0.145 lbf / inch 2 (psi) = 0.0102 kgf / cm 2 (kgf / cm2) =0.0098 atmosphere ( atm ) 1 lbs / inch 2 (psi) = 6.895 kilopascals (kPa) = 0.0703 kgf / cm 2 (kg / cm2) = 0.0689 bar ( bar ) = 0.068 atmosphere ( atm ) 1 physical atmosphere (atm) = 101.325 kilopascals (kPa) = 14.696 lb / inch 2 (psi) = 1.0333 bar ( bar ) Commonly used pressure measurement units and their identification symbols: ▲ MPa ( MPa ) ; kPa ( kPa ) ; Pa ( Pa ) ※ : The MPa sign of the pressure unit is MPa. Do not write it as Mpa mpa; The kPa sign kPa should not be written as KPa Kpa or kpa; The sign Pa should not be written as pa. ▲ pounds / inch 2 ( lbf/in2, psi ) ※ : Pound force / inch 2 in pressure units is lbf/in2, psi should not be written as Ibf/ln2 Psi; ▲ mmHg ( mmHg ) ※ : mmHg in millimeters of mercury in pressure units is not written in mmhg; ▲ Inches of mercury ( inHg ) ※ : The unit of pressure in inches of mercury is inHg not written inhg; ▲ mmH2O ※ : The millimeter water column symbol of the pressure unit is mmH2O. Do not write it as mmh2O; ▲ inch water column ( inH2O ) ※ : The unit of pressure in inches of water is inH2O not written as inh2O; ▲ kgf / cm 2 (kgf / cm2) ※: the pressure unit kgf / cm 2 symbols kgf / cm2 is not written Kgf / cm2; ▲ Physical Atmosphere ( atm ) ※ : The symbol of physical pressure in pressure unit is atm not written as Atm; ▲ bar ( bar ) ; millibar ( mbar ) ※ : The pressure units of bar and millibar symbols are bar and mbar. Do not write Bar and mBar; ◠Torr ※: torr pressure unit symbol is not written as Torr torr. Bedroom Wardrobe,Wooden Wardrobes,Living Room Wardrobe,Wardrobe With Dressing Table DUOBUY TECHNOLOGY SHANDONG CO., LTD. , https://www.doubuytech.com