You just ran a 5K in 28 minutes and want to know: What pace am I running at? You need to divide 5 kilometers by 28 minutes. But you also want to know what pace you should run for a half marathon based on your 5K speed. You could calculate it manually. Divide distance by time, convert units, then apply race prediction formulas. It requires multiple steps and mathematical precision. Or you could use a running pace calculator to instantly show your 5K pace is 5:36 per kilometer, and your predicted half marathon pace is 6:02 per kilometer. A running pace calculator converts your running time and distance into pace (time per mile or kilometer), predicts race times, and calculates training paces for different distances. Running pace calculators are used by competitive runners training for races, casual joggers tracking fitness, marathon training groups planning workouts, coaches designing training programs, and anyone wanting to understand their running speed. In this comprehensive guide, we...