Get the Most Out of Every Run - Without Running Harder

This free calculator helps you train smarter by taking the guesswork out of your pacing. Simply enter your most recent 5K, 10K, half marathon, or marathon time, and the tool will calculate your threshold pace. From there, it breaks down your five key training zones - each with precise pace ranges - so you know exactly how fast (or slow) to run during every workout for maximum results.