It all depends on your child's age. Charts that list the hours of sleep likely to be required by an infant or a 2-year-old may cause concern when individual differences aren't considered. These numbers are simply averages reported for large groups of children of particular ages.
There's no magical number of hours required by all kids in a certain age group. Two-year-old Sarah might sleep from 8:00 PM to 8:00 AM, whereas 2-year-old Johnny is just as alert the next day after sleeping from 10:00 PM to 5:00 AM. Still, sleep is very important to a child's well-being. The link between a child's lack of sleep and his or her behavior isn't always obvious. When adults are tired, they can either be grumpy or have low energy, but kids can become hyper, disagreeable, and have extremes in behavior.
Most kids' sleep requirements fall within a predictable range of hours based on their age, but each child is a unique individual with distinct sleep needs. Here are some approximate numbers based on age, accompanied by age-appropriate pro-sleep tactics.