Convert Cubic Kilometer (km³) to Cord (cd) instantly.
About these units
Cubic Kilometer (km³)
A cubic kilometer represents one billion cubic meters, making it a colossal volume unit used in geology, hydrology, glaciology, and planetary science. Large lakes, ice sheets, magma chambers, and atmospheric water content are often measured in km³. Earth's total ocean volume—about 1.335 billion km³—illustrates the unit's utility in describing planetary-scale systems. The km³ gives scientists a manageable number when dealing with natural features too massive for cubic meters or liters to express conveniently.
Cord (cd)
The cord is a large unit used in North America to measure firewood, defined as a neatly stacked pile measuring 128 cubic feet (usually arranged as 4 ft × 4 ft × 8 ft). Its strict definition helps prevent fraud in firewood sales and ensures fairness in trade. The cord accounts for both wood and air space, though the amount of actual wood can vary depending on how tightly it is stacked. Despite the prevalence of metric units worldwide, the cord remains a robust standard in forestry, firewood commerce, and rural heating practices across the US and Canada.