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darcy
Symbol:   
Category:  Hydrodynamic permeability 
SI Equivalent:  9.86923×10-13 m2
Dimension L2 
System:  cgs 
 
Notes
Named after H. Darcy (1803-1858), one darcy corresponds to the volume of a liquid with a dynamic viscosity of 1 centipoise flowing through a porous material with a cross section of 1 cm2 in 1 second when undergoing a pressure drop of 1 atm/cm. This unit was used in hydrology and civil engineering to measure the permeability of porous materials.
Convert     darcy  
1 darcy =
Area
  Symbol Unit Name
2.43874×10-16  ac, acre  acre 
9.86923×10-15  a  are 
9.86923×1015  b  barn 
2.52275×10-12  bbl (US, liq.)/ft  barrel (US, liq.) per foot 
2.10229×10-13  bbl (US, liq.)/in  barrel (US, liq.) per inch 
1.89206×10-12  bbl (US, petrol)/ft  barrel (US, petrol) per foot 
1.57672×10-13  bbl (US, petrol)/in  barrel (US, petrol) per inch 
9.86923×10-13    centare 
1.94772×10-9  cin  circular inch 
1.94772×10-3  cmil  circular mil 
9.86923×10-17  ha  hectare 
1.19709×10-16    morgen (Dutch) 
3.89743×10-16    morgen (Prussian) 
1.15223×10-16    morgen (South Africa) 
1.52421×10-18    quarter section 
9.75496×10-16    rood (UK) 
3.81053×10-19  sq.mi, mi2 (stat.)  section (square statute mile) 
9.86923×1039    shed 
9.86923×10-9  cm2  square centimeter 
1.06232×10-15  sq. ch. (engineer's)  square chain (engineer's) 
2.43874×10-15  sq. ch. (Gunter's)  square chain (Gunter's) 
9.86923×10-15  dam2  square decameter 
9.86923×10-11  dm2  square decimeter 
9.86923×10-49  Em2  square exameter 
9.86923×1017  fm2  square femtometer 
9.86923×1017  f2  square fermi 
1.06232×10-11  ft2  square foot 
9.86923×10-31  Gm2  square gigameter 
9.86923×10-17  hm2  square hectometer 
1.52973×10-9  in2, sq. in  square inch 
9.86923×10-19  km2  square kilometer 
9.86923×10-25  Mm2  square megameter 
9.86923×10-13  m2  square meter 
0.986923  ┬Ám2  square micrometer 
1.52973×10-3  mil2  square mil (thou) 
1.7918×10-20  sq. mi. (geogr.)  square mile (geographical) 
2.87741×10-19  sq. mi. (int. naut.)  square mile (int. naut.) 
3.81052×10-19  sq. mi. (int.)  square mile (int.) 
9.86923×10-7  mm2  square millimeter 
9.86923×105  nm2  square nanometer 
3.90196×10-14  rd2  square perch 
9.86923×10-43  Pm2  square petameter 
9.86923×1011  pm2  square picometer 
3.90196×10-14  rd2  square pole 
3.90196×10-14  rd2  square rod 
9.86923×10-37  Tm2  square terameter 
1.18035×10-12  yd2, sq. yd  square yard 
9.86923×1035  ym2  square yoctometer 
2.90031×10-51  Ym2  square yottameter 
9.86403×1029  zm2  square zeptometer 
2.90031×10-51  Zm2  square zettameter 
1.05848×10-20    township (US) 
5.48717×10-16    vergee (Jersey) 
6.40169×10-16    vergees (Guernsey) 
Fuel Consumption
  Symbol Unit Name
4.19584×10-7  gal/mile  gallon per mile 
9.86923×10-5  l/100 km  liter per 100 kilometers 
9.86923×10-7  l/km  liter per kilometer 
Glossary
Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.