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Joules to Therms (US) Converter (J to thm (US))

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Live Conversion • ISO 80000-5:2019 Certified
1 Joule = 9.480434 × 10⁻⁹ Therm (US)
1 J = 9.480434 × 10⁻⁹ thm (US) • 1 thm (US) = 1.054804 × 10⁸ J
Joule to Therm (US): One Joule is equal to 9.480434 × 10⁻⁹ Therms (US).
Certified Authority Value
0.00000001
thm (US)
Exact: 1 thm (US) ≡ 1.0548040311 × 10⁸ J
J
J
Swap to Therm (US) to Joule
Swap to Therm (US) to Joule
thm (US)
thm (US) 9.480434 × 10⁻⁹
Quick Values:
Conversion Formula
To convert Joule to Therm (US), multiply by 9.480434 × 10⁻⁹
J × 9.480434 × 10⁻⁹ = thm (US)

Calculation: 1 J × 9.480434 × 10⁻⁹ = 9.480434 × 10⁻⁹ thm (US)

Common Joule to Therm (US) Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Joule (J) and Therm (US) (thm (US)).

Tap any row to calculate
Joule to Therm (US): Primary Direct Table (15 Steps)
Joule to Therm (US) Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 J 9.480434 × 10⁻¹² thm (US) 9.48 × 10⁻¹²
0.01 J 9.480434 × 10⁻¹¹ thm (US) 9.48 × 10⁻¹¹
0.1 J 9.480434 × 10⁻¹⁰ thm (US) 9.48 × 10⁻¹⁰
0.5 J 4.740217 × 10⁻⁹ thm (US) 4.74 × 10⁻⁹
1 J 9.480434 × 10⁻⁹ thm (US) 9.48 × 10⁻⁹
2 J 1.896087 × 10⁻⁸ thm (US) 1.896 × 10⁻⁸
5 J 4.740217 × 10⁻⁸ thm (US) 4.74 × 10⁻⁸
10 J 9.480434 × 10⁻⁸ thm (US) 9.48 × 10⁻⁸
20 J 1.896087 × 10⁻⁷ thm (US) 1.896 × 10⁻⁷
25 J 2.370108 × 10⁻⁷ thm (US) 2.37 × 10⁻⁷
50 J 4.740217 × 10⁻⁷ thm (US) 4.74 × 10⁻⁷
100 J 9.480434 × 10⁻⁷ thm (US) 9.48 × 10⁻⁷
250 J 2.370108 × 10⁻⁶ thm (US) 2.37 × 10⁻⁶
500 J 4.740217 × 10⁻⁶ thm (US) 4.74 × 10⁻⁶
1000 J 9.480434 × 10⁻⁶ thm (US) 9.48 × 10⁻⁶
Therm (US) to Joule: Reciprocal Summary
Therm (US) to Joule Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 thm (US) 1.054804 × 10⁸ J 1.055 × 10⁸
5 thm (US) 5.27402 × 10⁸ J 5.274 × 10⁸
10 thm (US) 1.054804 × 10⁹ J 1.055 × 10⁹
50 thm (US) 5.27402 × 10⁹ J 5.274 × 10⁹
100 thm (US) 1.054804 × 10¹⁰ J 1.055 × 10¹⁰
View Complete 15-Row Therm (US) to Joule Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Joule (J) and Therm (US) (thm (US)):

Joule References:

  • Mechanical work required to lift a medium culinary apple vertically by one meter 1 J
  • Kinetic energy of a standard tennis ball dropped from waist height 1 J
  • Energy consumed by a 1-watt LED pilot lamp operating for one second 1 J

Therm (US) References:

  • United States legal utility gas measurement therm standard (105.4804 MJ) 1 thm (US)

Tap any benchmark above to automatically calculate its exact equivalent in Therm (US).

ISQ Dimension: [M L² T⁻²] Coherent SI Unit: joule (J) Chemical Engineering, Solutions & Physical Chemistry

How to Convert Joule to Therm (US)

Converting Joule (J) to Therm (US) (thm (US)) is a core calculation in Energy and Work, which quantifies the physical capacity to perform mechanical work, generate heat, or emit electromagnetic radiation. Because Therm (US) is a broader physical scale than Joule, converting from J to thm (US) condenses the numerical figure. It takes 1.054804 × 10⁸ Joule to equal a single Therm (US) (1 J = 9.480434 × 10⁻⁹ thm (US)). To convert any quantity, multiply by 9.480434 × 10⁻⁹ (or divide by 1.054804 × 10⁸).

Direct Factor1 J = 9.480434 × 10⁻⁹ thm (US)
Inverse Ratio1 thm (US) = 1.054804 × 10⁸ J
Conversion ScaleDirect Proportional Magnitude Compression
First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (joule (J)) without arbitrary rounding:

Vtarget=Vsource×(ksource→SIktarget→SI)V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)
Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)
1. Source SI Bridge (ksource):1 J = 1 joule (J)
2. Target SI Bridge (ktarget):1 thm (US) = 1.054804 × 10⁸ joule (J)
Step-by-step substitution for Joule → Therm (US):V(thm (US)) = V(J) × ( 1 / 1.054804 × 10⁸ ) = V(J) × 9.480434 × 10⁻⁹
Mathematical FormulaValue in Therm (US) = Value in Joule × 9.480434 × 10⁻⁹Direct computational formula applied for standard conversion.
Worked Example

Converting 36 J yields an exact output of 3.412956 × 10⁻⁷ thm (US) in Therm (US). Under higher industrial throughput, 2500 J translates to 2.370109 × 10⁻⁵ thm (US).

Inverse check: 1 thm (US) = 1.054804 × 10⁸ J.

Understanding Joule and Therm (US)

Joule

J
Coherent SI Unit

The joule (J) is the coherent SI-derived unit of energy, work, and heat, named after James Prescott Joule.

Applications & Practical Context

In practical energy terms, a mechanical work required to lift a medium culinary apple vertically by one meter equals 1 J, a kinetic energy of a standard tennis ball dropped from waist height equals 1 J, a energy consumed by a 1-watt LED pilot lamp operating for one second equals 1 J.

Physical Setup

An energy of 1 joule is the work done by a force of 1 newton acting through a displacement of 1 meter, or dissipating 1 watt of electrical power over 1 second.

Conversion to SI Unit: joule (J)
1 J = 1 N·m = 1 W·s

Therm (US)

thm (US)
Imperial / US

A Therm (US) (thm (US)) is an imperial and US customary unit for energy and work.

Applications & Practical Context

In practical energy terms, a united States legal utility gas measurement therm standard (105.4804 MJ) equals 1 thm (US).

Physical Setup

An energy quantity of 1 thm (US) corresponds to 1.054804 × 10⁸ J (performing 1.054804 × 10⁸ joules of work or heat transfer).

Conversion to SI Unit: joule (J)
1 thm (US) = 1.054804 × 10⁸ J

Domain Metrology & Engineering Applications

Governing Law & Equation

First Law of Thermodynamics (Conservation of Energy: ΔU = Q - W)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using isoperibol bomb calorimeters, optical laser pulse joulemeters, and digital revenue-grade electric energy meters.

Primary Industry Sectors

Applied across electric power utility metering, thermal energy storage design, chemical plant process enthalpies, and ballistic impact engineering under international metrology standard ISO 80000-5:2019, NIST SP 811.

Physical Orders of Magnitude & Laboratory Reference Benchmarks

Physical Phenomenon / Engineering ReferenceReference ValueConverted to Therm (US)
Mechanical work required to lift a medium culinary apple vertically by one meter1 J9.480434 × 10⁻⁹ thm (US)
Kinetic energy of a standard tennis ball dropped from waist height1 J9.480434 × 10⁻⁹ thm (US)
Energy consumed by a 1-watt LED pilot lamp operating for one second1 J9.480434 × 10⁻⁹ thm (US)
Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-5:2019, NIST SP 811 and the BIPM SI Brochure (9th Edition). Governed by First Law of Thermodynamics (Conservation of Energy: ΔU = Q - W) under ISO 80000 dimensional vector [M L² T⁻²].

Multi-Variable Engineering Bridge Thermal Enthalpy & Continuous Power

Energy to Continuous Operating Power Bridge (Watts • Kilowatts • Megawatts • Horsepower)

Calculate required average generating or consuming power P = E / t over specified timespans, bridging energy [M L² T⁻²] with continuous power [M L² T⁻³].

P = E / t
Vector: [J] ÷ [s] → [W]
Live Calculated Bridge Equivalent:
1 J at 1 Hour Continuous Run (3,600 s) = 0.0002778 W
Equals 2.7778 × 10⁻⁷ kW • 2.777778 × 10⁻¹⁰ MW • 3.7251 × 10⁻⁷ hp
SI Power
0.0002778
W
Watts
Grid / Utility
2.7778 × 10⁻⁷
kW
Kilowatts
Power Plant
2.777778 × 10⁻¹⁰
MW
Megawatts
Mechanical Rating
3.7251 × 10⁻⁷
hp
Horsepower (Mechanical)
Metric Horsepower
3.7767 × 10⁻⁷
PS
Metric Horsepower (PS)
HVAC Thermal Rating
0.00095
BTU/h
BTU per Hour
  1. 1. Normalize Input to SI Base Unit (J):
    E = 1 J × 1 = 1 J
  2. 2. Apply Engineering Parameter (t):
    Selected condition: 1 Hour Continuous Run (3,600 s) at t = 3600 s
  3. 3. Execute Governing Physical Law in SI Units:
    P = E / t = (1 J) ÷ (3600 s) = 0.00027778 W
  4. 4. Convert to Standard Engineering Units:
    • W: 0.00027778 × 1 = 0.0002778 W (Watts) • kW: 0.00027778 × 0.001 = 2.7778 × 10⁻⁷ kW (Kilowatts) • MW: 0.00027778 × 1 × 10⁻⁶ = 2.777778 × 10⁻¹⁰ MW (Megawatts) • hp: 0.00027778 × 0.001341 = 3.7251 × 10⁻⁷ hp (Horsepower (Mechanical)) • PS: 0.00027778 × 0.00136 = 3.7767 × 10⁻⁷ PS (Metric Horsepower (PS)) • BTU/h: 0.00027778 × 3.4121 = 0.00095 BTU/h (BTU per Hour)
Explore Full Power Converter →
Engineering Substance / Operating Standard Parameter Value (s) Reference State / Condition Typical Industrial & Engineering Application
1 Second Instant Discharge 1 1.0 s Peak pulse discharge rating
1 Minute Fast Delivery (60 s) 60 60 s EV fast acceleration or battery boost
1 Hour Continuous Run (3,600 s) 3600 3,600 s (1 hour) Standard 1-hour energy delivery
8 Hours (28,800 s) 28800 28,800 s (8 hours) Single shift continuous draw
24 Hours (86,400 s) 86400 86,400 s (24 hours) Full day steady-state consumption
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Frequently Asked Questions

There are exactly 9.480434 × 10⁻⁹ therms (us) (thm (US)) in 1 joule (J). To calculate larger amounts manually, simply multiply your total number of joules by the conversion multiplier of 9.480434 × 10⁻⁹.

The mathematical formula to convert joules to therms (us) is: [value] * 9.480434 × 10⁻⁹ = therms (us). Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from therms (us) back to joules, you must divide your starting value by 9.480434 × 10⁻⁹. Our bidirectional tool automatically computes this inverse equation the moment you type into the therm (us) input field.

1 Therm (US) is larger than 1 Joule. Specifically, 1 Joule equals 9.480434 × 10⁻⁹ therms (us), meaning 1 Therm (US) is 1.0548 × 10⁸ times larger than 1 Joule (a difference of 8.02 orders of magnitude). Expressing measurements in joules requires a larger numerical value to represent the equivalent physical magnitude.

A typical mechanical work required to lift a medium culinary apple vertically by one meter measures 1 J, which corresponds to 9.4804 × 10⁻⁹ Therm Us (Therm (US)).

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