Convert Petaliter (PL) to Teaspoon (UK) (tsp (UK)) instantly.
About these units
Petaliter (PL)
A petaliter represents 10¹⁵ liters, a massive unit used to quantify the total water content of oceans, polar ice sheets, or planetary atmospheres. Oceanographers may describe the Pacific Ocean's volume or the total ice volume of Antarctica in petaliters; these scales cannot be expressed meaningfully in smaller units without imposing huge, impractical numbers. The PL is also sometimes used in astronomy to approximate ocean-like features on other worlds, such as subsurface oceans on Europa or Enceladus. It represents one of the largest practical volumetric units before entering pure theoretical measurement.
Teaspoon (UK) (tsp (UK))
The UK teaspoon is defined as 5 milliliters, a value adopted in modern culinary and medical standards. Historically, however, its size varied considerably, often ranging from 4 to 6 mL depending on household spoons, region, or era. The modern 5 mL standardization brought consistency to recipes, pharmaceutical dosing instructions, and food labeling. Because teaspoons were once everyday household items rather than calibrated instruments, the move toward fixed metric equivalents significantly improved recipe reliability and medical accuracy. Despite the shift to SI units, the teaspoon endures as a culturally intuitive volume measure used in cooking and oral medication dosing, tying contemporary practice to long-standing domestic traditions.