Ergs to BTU (IT) Converter
Enter a value to instantly convert between energy units.
1 Erg = 9.4782e-11 BTU (IT)
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
BTU = erg × 9.478171e-11One erg equals 9.48 × 10⁻¹¹ BTU. The erg is a CGS (centimeter-gram-second) unit used in astrophysics and older scientific literature, where energy scales are often tiny. BTU is the imperial standard for heating. Converting ergs to BTU is essential when comparing stellar energy output (in ergs) with thermal engineering specifications (in BTU) or translating astrophysical data to US engineering contexts. See also ergs to kilojoules.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A supernova releases ~10⁴⁷ erg — about 9.5 BTU. Ergs scale immensely for stellar events.
1e+47 erg = 9.478 BTU
A gamma-ray burst: ~10⁵⁰ erg = 9,478 BTU equivalent — still tiny for imperial heating contexts.
1e+50 erg = 9478 BTU
A chemistry experiment measures 10³⁰ erg of energy — 9.48 × 10⁻¹² BTU — showing why ergs dominate atomic scales.
1e+30 erg = 9.478e-12 BTU
An astrophysicist compares a stellar flare at 10⁴⁵ erg to furnace energy: 0.095 BTU — order of magnitude difference.
1e+45 erg = 0.09478 BTU