Joule to Megajoule Converter
Energy · unit-converter
Convert Joule to Megajoule with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Joule (j)
To: Megajoule (mj)
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
About Megajoule
One megajoule is 1,000,000 J. It is common in fuel-content and engineering thermal calculations.
How to convert joules to megajoules
1 joule is equal to 0.000001 megajoule when both are expressed in joule-equivalents:
1 j = (1 J ÷ 1,000,000 J) mj = 0.000001 mj
Each joule is defined as 1 J and each megajoule as 1,000,000 J in this tool, so one j equals 1 ÷ 1,000,000 mj = 0.000001 mj.
Let d(j) be the numeric amount in Joule (j), and d(mj) the amount in Megajoule (mj). Then:
d(mj) = d(j) × (1 / 1,000,000)
Equivalently, divide by how many j fit into one mj (joules per mj divided by joules per j):
d(mj) = d(j) ÷ 1000000
Or: megajoule = joule ÷ 1000000
Examples
Example #1: Convert 1 j to megajoule
1 j = 1 j × (1/1,000,000) mj = 0.000001 mj
1 j = 1 j ÷ 1000000 = 0.000001 mj
Example #2: Convert 10 j to megajoule
10 j = 10 j × (1/1,000,000) mj = 0.00001 mj
10 j = 10 j ÷ 1000000 = 0.00001 mj
Summary
To convert Joule to Megajoule, multiply the value in j by the ratio of joules per j divided by joules per mj. Equivalently: value_mj = value_j × (1 / 1000000). Numerically, 1 j equals 0.000001 mj.
Relationship context
Both units are SI energy (joules). Conversions use fixed joule factors, so results stay consistent with the definitions in this converter. The factor from Joule to Megajoule is 1.000000e-6 (1 j = 0.000001 mj).
Conversion tables
| Joule (j) | Megajoule (mj) |
|---|---|
| 0.1 | 0.0000001 |
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 4 | 0.000004 |
| 5 | 0.000005 |
| 6 | 0.000006 |
| 7 | 0.000007 |
| 8 | 0.000008 |
| 9 | 0.000009 |
| Joule (j) | Megajoule (mj) |
|---|---|
| 10 | 0.00001 |
| 20 | 0.00002 |
| 30 | 0.00003 |
| 40 | 0.00004 |
| 50 | 0.00005 |
| 60 | 0.00006 |
| 70 | 0.00007 |
| 80 | 0.00008 |
| 90 | 0.00009 |
| 100 | 0.0001 |