La energía es la capacidad de realizar el trabajo.Existe en varias formas, como cinética, potencial, térmica, etc. Se mide en Joules (J).
1 GJ = 1,000,000,000 N·m 
1 N·m = 1.0000e-9 GJ 
Ejemplo: 
Convertir 15 Gigalano a Newton Meter:
15 GJ = 15,000,000,000 N·m 
| Gigalano | Newton Meter | 
|---|---|
| 0.01 GJ | 10,000,000 N·m | 
| 0.1 GJ | 100,000,000 N·m | 
| 1 GJ | 1,000,000,000 N·m | 
| 2 GJ | 2,000,000,000 N·m | 
| 3 GJ | 3,000,000,000 N·m | 
| 5 GJ | 5,000,000,000 N·m | 
| 10 GJ | 10,000,000,000 N·m | 
| 20 GJ | 20,000,000,000 N·m | 
| 30 GJ | 30,000,000,000 N·m | 
| 40 GJ | 40,000,000,000 N·m | 
| 50 GJ | 50,000,000,000 N·m | 
| 60 GJ | 60,000,000,000 N·m | 
| 70 GJ | 70,000,000,000 N·m | 
| 80 GJ | 80,000,000,000 N·m | 
| 90 GJ | 90,000,000,000 N·m | 
| 100 GJ | 100,000,000,000 N·m | 
| 250 GJ | 250,000,000,000 N·m | 
| 500 GJ | 500,000,000,000 N·m | 
| 750 GJ | 750,000,000,000 N·m | 
| 1000 GJ | 1,000,000,000,000 N·m | 
| 10000 GJ | 10,000,000,000,000 N·m | 
| 100000 GJ | 100,000,000,000,000 N·m |