Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 J | 9.480e-12 therm | |
| 0.01 J | 9.480e-11 therm | |
| 0.1 J | 9.480e-10 therm | |
| 1 J | 9.48043e-09 therm | |
| 5 J | 4.74022e-08 therm | |
| 10 J | 9.48043e-08 therm | |
| 50 J | 4.74022e-07 therm | |
| 100 J | 9.48043e-07 therm | |
| 1000 J | 9.48043e-06 therm |
Formula: Therm = Joule × 9.4804e-9
Multiply any joule value by 9.4804e-9 to get therm.
Reverse: Joule = Therm × 1.055e+08
Common joule values — factor: 1 J = 9.4804e-9 therm
| Joule (J) | Therm (therm) | Context |
|---|---|---|
| 0.001 J | 9.480e-12 therm | 1 mJ |
| 0.1 J | 9.480e-10 therm | Heartbeat |
| 1 J | 9.480e-09 therm | Lift apple 10cm |
| 4.184 J | 3.967e-08 therm | 1 calorie |
| 100 J | 9.480e-07 therm | Sprinting 1 sec |
| 1,000 J | 9.480e-06 therm | 1 kJ |
| 4,184 J | 3.967e-05 therm | 1 kcal food |
| 1e+04 J | 9.480e-05 therm | 10 kJ |
| 1e+05 J | 0.000948 therm | 100 kJ |
| 1.055e+06 J | 0.01 therm | 1 BTU |
| 3.6e+06 J | 0.03413 therm | 1 kWh |
| 1e+08 J | 0.948 therm | ~100 MJ |
| 1.000e+09 J | 9.48 therm | 1 GJ |
| 1.000e+12 J | 9,480 therm | 1 TJ |
| 1.000e+15 J | 9.48e+06 therm | 1 PJ |
1 J = 9.4804e-9 therm. Memorize for instant estimates.
Use 9.4804e-9 as a quick mental multiplier.
Multiply result by 1.055e+08 to recover the original J value.
Uses joules as the SI unit for all energy, work, and heat calculations.
Calculates kinetic energy, potential energy, and work in joules.
Measures reaction enthalpies, bond energies, and heat of solution in joules.
Converts between power (watts) and energy (joules = watt-seconds).
Measures fracture energy and impact resistance in joules.
Applies the first law of thermodynamics with energy in joules.
The joule is the SI derived unit of energy, work, and heat, defined as the energy transferred when a force of one newton moves an object one meter. It was named after James Prescott Joule, the English physicist who established the mechanical equivalent of heat in the 1840s.
The joule is universal in physics and engineering: kinetic energy (½mv²), potential energy (mgh), electrical energy (VIt), and heat are all measured in joules. One joule is the energy needed to lift a 100g apple one meter against gravity.
Interesting fact: The human heart expends about 1 joule of energy with each beat. A 60-watt light bulb uses 60 joules every second. The entire energy released by a 1-megaton nuclear weapon equals about 4.18 × 10¹⁵ joules.
The therm is a unit of natural gas energy equal to 100,000 BTU (105,480,400 joules). It is the standard billing unit for natural gas in the United States and United Kingdom. The name comes from the Greek thermos (heat).
Gas utilities bill residential and commercial customers in therms in the US and UK. A typical US household uses about 50–100 therms per month in winter. Natural gas furnaces and water heaters are rated in therms per hour.
Interesting fact: One therm of natural gas costs about $1.00–$2.00 in the US. Burning one therm releases about 5.3 kg of CO₂. The US consumes about 28 trillion therms of natural gas equivalent energy per year.
Converting joule to therm is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 J = 4.7402e-8 therm and 10 J = 9.4804e-8 therm. Reverse: 1 therm = 1.055e+08 J. Exact factor: 1 J = 9.4804e-9 therm.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.