Megajoule is 1000000 joule units.
Megajoules to Terajoules Converter — MJ to TJ
Convert Megajoule (MJ) to Terajoule (TJ) using the exact conversion factor (1 megajoule = 0.000001 terajoule). See the formula, worked examples, and conversion table.
Megajoules to Terajoules 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.
Terajoule is 1000000000000 joule units.
Result = input x 1e+6 / 1e+12.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Megajoules to Terajoules
Megajoule and Terajoule 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: Megajoule is 1000000 joule units, and terajoule is 1000000000000 joule units.
Formula
terajoules = megajoules × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 megajoule equals 1000000 base units, and 1 terajoule equals 1e+12 base units, so dividing one by the other gives the direct megajoule-to-terajoule factor of 0.000001.
Simple example
1 MJ × 0.000001 = 0.000001 TJ
1 megajoule = 0.000001 terajoules.
Real-world example
100 MJ × 0.000001 = 0.0001 TJ
100 megajoules = 0.0001 terajoules.
Conversion table
| Megajoule (MJ) | Terajoule (TJ) |
|---|---|
| 1 MJ | 0.000001 TJ |
| 10 MJ | 0.00001 TJ |
| 50 MJ | 0.00005 TJ |
| 100 MJ | 0.0001 TJ |
| 500 MJ | 0.0005 TJ |
| 1,000 MJ | 0.001 TJ |
Reverse conversion: Terajoule to Megajoule
0.000001 TJ × 1000000 = 1 MJ
0.000001 terajoules = 1 megajoule.
megajoules = terajoules × 1000000
For a page dedicated to this direction, see Terajoule to Megajoule.
Understanding the Megajoule (MJ)
Megajoule is 1000000 joule units.
Understanding the Terajoule (TJ)
Terajoule is 1000000000000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many terajoules are in 1 megajoule?
1 megajoule equals 0.000001 terajoules, using the exact defined conversion factor rather than an estimate.
How do I convert megajoule to terajoule?
Multiply the megajoule value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert terajoule back to megajoule?
Use the reverse factor: 1 terajoule equals 1,000,000 megajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a megajoule?
Megajoule (MJ) is a unit of engineering.
What is a terajoule?
Terajoule (TJ) is a unit of engineering.
Is the megajoule to terajoule conversion exact?
Yes. Both megajoule and terajoule are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 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.