Our free online sum calculator makes adding numbers quick and simple. Whether you're adding numbers separated by commas, spaces, or special characters, this tool gives you instant, accurate results. Just enter your list of numbers, and the calculator will sum them up in seconds. It supports whole numbers, decimal numbers, and even array formats like ["12", "1", 3, 1]. Ideal for fast calculations without any hassle, whether for basic math, accounting, or everyday use.