Pick out the wrong unit conversion.

• 1 Joule = 4.186 calorie.
• 1 kcal = 3.968 BTU = 0.00116 kWh = 0.00156 hp.
• 1 ton of TNT (tri-nitro-toluene) = 4.2 GJ (1G = 109).
• 1 ft.lbf= 0.3238 calorie = 0.1383 kg.m = 1.356 J = 1.356 N.m.