A solar calculator is a type of calculator that uses solar panels to convert sunlight into electrical energy. This energy powers the calculator, allowing it to function without the need for batteries. Solar calculators are often compact and portable, making them convenient for both indoor and outdoor use. These devices are environmentally friendly since they reduce battery waste and rely on renewable energy. Solar calculators are commonly used in schools, offices, and homes, providing a reliable and sustainable option for performing mathematical calculations. They are especially useful in bright environments where sunlight can easily recharge the solar cells.