EVERYDAY · ENGINEERING · SCIENCE

Unit conversion. Made clear.

Start with a familiar unit, type a value, and get a dependable answer with sensible precision. Fractions and scientific notation are welcome.

520units ready to convert
ENERGY

Energy & work

Mechanical, electrical, thermal and particle energy.

therm US
BtuIT

Try a decimal, 1e-9, 1/3, or 5 1/2.

Resulttherm US → BtuITConvert U.S. therm to International Table British thermal unit
HOW IT IS CALCULATED

Convert through joule

Enter a U.S. therm value to calculate International Table British thermal unit with full internal precision before display rounding.

Display precisionAuto · 12 significant digits

Auto keeps up to 12 significant digits, trims unnecessary zeroes, and switches to scientific notation for extreme magnitudes.

QUICK REFERENCE

All units in this quantity

UnitSymbolConverted value
ergfrom therm USergInteractive
microjoulefrom therm USµJInteractive
millijoulefrom therm USmJInteractive
joulefrom therm USJInteractive
kilojoulefrom therm USkJInteractive
megajoulefrom therm USMJInteractive
gigajoulefrom therm USGJInteractive
watt-hourfrom therm USWhInteractive
kilowatt-hourfrom therm USkWhInteractive
megawatt-hourfrom therm USMWhInteractive
thermochemical caloriefrom therm UScalₜₕInteractive
thermochemical kilocaloriefrom therm USkcalₜₕInteractive
International Table caloriefrom therm UScalITInteractive
International Table British thermal unitfrom therm USBtuITInteractive
U.S. thermfrom therm UStherm USInteractive
foot pound-forcefrom therm USft·lbfInteractive
electronvoltfrom therm USeVInteractive
kiloelectronvoltfrom therm USkeVInteractive
megaelectronvoltfrom therm USMeVInteractive
gigaelectronvoltfrom therm USGeVInteractive
ton of TNTfrom therm USt TNTInteractive

SI symbols follow international notation. U.S. and Imperial measures are labelled separately where their values differ.