Megajoule to Kilojoule Converter
Energy · unit-converter
Convert Megajoule to Kilojoule 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: Megajoule (mj)
To: Kilojoule (kj)
About Megajoule
One megajoule is 1,000,000 J. It is common in fuel-content and engineering thermal calculations.
About Kilojoule
One kilojoule is 1,000 J. Scientific and engineering contexts often use kJ alongside joules.
How to convert megajoules to kilojoules
1 megajoule is equal to 1000 kilojoule when both are expressed in joule-equivalents:
1 mj = (1,000,000 J ÷ 1,000 J) kj = 1000 kj
Each megajoule is defined as 1,000,000 J and each kilojoule as 1,000 J in this tool, so one mj equals 1,000,000 ÷ 1,000 kj = 1000 kj.
Let d(mj) be the numeric amount in Megajoule (mj), and d(kj) the amount in Kilojoule (kj). Then:
d(kj) = d(mj) × (1,000,000 / 1,000)
Equivalently, divide by how many mj fit into one kj (joules per kj divided by joules per mj):
d(kj) = d(mj) ÷ 0.001
Or: kilojoule = megajoule ÷ 0.001
Examples
Example #1: Convert 1 mj to kilojoule
1 mj = 1 mj × (1,000,000/1,000) kj = 1000 kj
1 mj = 1 mj ÷ 0.001 = 1000 kj
Example #2: Convert 10 mj to kilojoule
10 mj = 10 mj × (1,000,000/1,000) kj = 10000 kj
10 mj = 10 mj ÷ 0.001 = 10000 kj
Summary
To convert Megajoule to Kilojoule, multiply the value in mj by the ratio of joules per mj divided by joules per kj. Equivalently: value_kj = value_mj × (1000000 / 1000). Numerically, 1 mj equals 1000 kj.
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 Megajoule to Kilojoule is 1.000000e+3 (1 mj = 1000 kj).
Conversion tables
| Megajoule (mj) | Kilojoule (kj) |
|---|---|
| 0.1 | 100 |
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 6 | 6,000 |
| 7 | 7,000 |
| 8 | 8,000 |
| 9 | 9,000 |
| Megajoule (mj) | Kilojoule (kj) |
|---|---|
| 10 | 10,000 |
| 20 | 20,000 |
| 30 | 30,000 |
| 40 | 40,000 |
| 50 | 50,000 |
| 60 | 60,000 |
| 70 | 70,000 |
| 80 | 80,000 |
| 90 | 90,000 |
| 100 | 100,000 |