How many watt-hours are in 1 kilojoule?

1 kilojoule equals 0.277778 Wh.

How do I convert watt-hours back to kilojoules?

Use the reverse converter: 1 watt-hour equals 3.6 kJ.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert kilojoules to watt-hours, multiply the value by 0.277777778.

Wh = kJ × 0.277777778

40 kJ × 0.277777778 = 11.11 Wh

Kilojoule (kJ): 1,000 joules; used for food energy in Australia, New Zealand and much of Europe.
Watt-hour (Wh): Used for battery capacity. Equal to 3,600 joules.

How do I convert kilojoules to watt-hours?: To convert kilojoules to watt-hours, multiply the value by 0.277777778.
How many watt-hours are in 1 kilojoule?: 1 kilojoule equals 0.277778 Wh.
How many watt-hours are in 10 kilojoules?: 10 kJ equals 2.77778 Wh.
How do I convert watt-hours back to kilojoules?: Use the reverse converter: 1 watt-hour equals 3.6 kJ.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.