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