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British thermal unit (ISO)
Symbol:  Btu (ISO) 
Category:  Energy 
SI Equivalent:  1055.06 J
Dimension:  ML2T-2 
System:  UK 
Convert     Btu (ISO)  
1 Btu (ISO) =
Energy
  Symbol Unit Name
2.42×1020  Eh  a.u. of energy 
1.72395×10-7  bboe  barrel oil equivalent 
1.72395×10-7  bboe  bboe (barrel oil equivalent) 
6.58516×1012  BeV  BeV (billion eV) 
1  Btu (IT)  British thermal unit (IT) 
0.999233  Btu (mean)  British thermal unit (mean) 
1.00067  Btu (therm.)  British thermal unit (thermochemical) 
252.105  cal15  calorie (15°C) 
250.936  cal4  calorie (4°C) 
0.252407  Cal, kcal  Calorie (diet kilocalorie) 
252  cal (IT)  calorie (IT) (International Steam Table) 
251.803  calmean  calorie (mean) 
252.165  cal (therm.)  calorie (thermochemical) 
0.555535  Chu  Celsius-heat unit 
1055.06  C-V  coulomb volt 
1.04126×104  cm3-atm  cubic centimeter-atm 
0.367719  ft3-atm  cubic foot atm 
6.58516×1021  eV  electronvolt 
1.05506×1010  erg  erg 
778.172  ft-lbf  foot-pound force 
2.5037×104  ft-pdl  foot-poundal 
6.58516×1012  GeV  gigaelectronvolt 
252  gram-cal  gram calorie 
2.42×1020  Eh  hartree 
3.93016×10-4  Hp-h  horsepower (550ft-lbf/s)-hour 
9338.07  in-lbf  inch pound force 
1055.06  J  joule 
0.252075  kcal15  kilocalorie (15°C) 
0.250936  kcal4  kilocalorie (4°C) 
6.58516×1018  keV  kiloelectronvolt 
1.05506  kJ  kilojoule 
2.52407×10-10  kt (TNT)  kiloton TNT equivalent 
2.93072×10-4  kWh  kilowatt-hour 
6.58516×1015  MeV  megaelectronvolt 
1.05506×10-3  MJ  megajoule 
2.52407×10-13  Mt (TNT)  megaton TNT equivalent 
1055.06  N-m  newton meter 
1.00006×10-18    Q unit 
1×10-15  quad  quad 
1×10-15  quad  quadrillion 
4.84×1020  Ry  rydberg 
3.60212×10-8  tce  tce (tonne coal equivalent) 
1×10-5    therm (EEG) 
1.00024×10-5    therm (US) 
2.52075×10-4  th15 °C  thermie (15°C) 
2.51985×10-8  toe  toe (tonne oil equivalent) 
2.52407×10-7  ton (TNT)  ton TNT equivalent 
3.60212×10-8  tce  tonne coal equivalent 
2.51985×10-8  toe  tonne oil equivalent 
0.293072  Wh  watt hour 
Moment, Torque
  Symbol Unit Name
1.05506×1010  dyn-cm  dyne-centimeter 
1.07586×107  gf-cm  gram force-centimeter 
107.586  kgf-m  kilogram force-meter 
1.05506×105  N-cm  newton-centimeter 
1055.06  N-m  newton-meter 
1.49409×105  ozf-in  ounce force-inch 
778.172  lbf-ft  pound force-foot 
9338.07  lbf-in  pound force-inch 
2.5037×104  pdl-ft  poundal-foot 
Glossary
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STEM Career Outlook

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

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

3D Scanners

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

more publications