Hour is a unit of time equal to 60 minutes, or 3,600 seconds. It is commonly used to measure the duration of events or the intervals between them. Which is correct hr or hrs? The correct answer is "hrs". The acronym "hr" stands for "hour", while "hrs" is the plural form of the word. Is it 2 hr or 2 hrs? The answer is "2 hrs", with the "h" being lowercase. The reason for this is that the International Organization for Standardization (ISO) dictates that abbreviations for units of time should be written in lowercase. What is the correct abbreviation for hours? The correct abbreviation for "hours" is "hrs". How do you write hrs? The most common way to write "hrs" is with a lowercase "h" followed by an uppercase "r" and a lowercase "s". This is the standard way to abbreviate the word "hours" and is used in many different contexts. What does hr mean in time? The hr element in time represents the hour component of the time value, without a leading zero for single-digit hours. The value must be an integer between 0 and 23.