Quectojoule is 1e-30 joule units.
Quectojoules to US therms Converter — qJ to therm
Convert Quectojoule (qJ) to US therm (therm) using the exact conversion factor (1 quectojoule = 9.480434e-39 us therm). See the formula, worked examples, and conversion table.
Quectojoules to US therms converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
US therm used for natural gas energy.
Result = input x 1e-30 / 1.054804e+8.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Quectojoules to US therms
Quectojoule and US therm both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Quectojoule is 1e-30 joule units, and uS therm used for natural gas energy.
Formula
us therms = quectojoules × 9.480434e-39
This factor comes from each unit's defined relationship to the category's base unit: 1 quectojoule equals 1e-30 base units, and 1 us therm equals 105480400 base units, so dividing one by the other gives the direct quectojoule-to-us therm factor of 9.480434e-39.
Simple example
1 qJ × 9.480434e-39 = 9.480434e-39 therm
1 quectojoule = 9.480434e-39 us therms.
Real-world example
100 qJ × 9.480434e-39 = 9.480434e-37 therm
100 quectojoules = 9.480434e-37 us therms.
Conversion table
| Quectojoule (qJ) | US therm (therm) |
|---|---|
| 1 qJ | 9.480434e-39 therm |
| 10 qJ | 9.480434e-38 therm |
| 50 qJ | 4.740217e-37 therm |
| 100 qJ | 9.480434e-37 therm |
| 500 qJ | 4.740217e-36 therm |
| 1,000 qJ | 9.480434e-36 therm |
Reverse conversion: US therm to Quectojoule
9.480434e-39 therm × 1.054804e+38 = 0.9999999705 qJ
9.480434e-39 us therms = 0.9999999705 quectojoules.
quectojoules = us therms × 1.054804e+38
For a page dedicated to this direction, see US therm to Quectojoule.
Understanding the Quectojoule (qJ)
Quectojoule is 1e-30 joule units.
Understanding the US therm (therm)
US therm used for natural gas energy.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many us therms are in 1 quectojoule?
1 quectojoule equals 9.480434e-39 us therms, using the exact defined conversion factor rather than an estimate.
How do I convert quectojoule to us therm?
Multiply the quectojoule value by 9.480434e-39. The converter above does this instantly to whatever precision you set.
How do I convert us therm back to quectojoule?
Use the reverse factor: 1 us therm equals 1.054804e+38 quectojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a quectojoule?
Quectojoule (qJ) is a unit of engineering.
What is a us therm?
US therm (therm) is a unit of engineering.
Is the quectojoule to us therm conversion exact?
Yes. Both quectojoule and us therm are defined by fixed standards rather than physical artifacts, so the factor of 9.480434e-39 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.