Tweet Pace calculator Calculate your running pace per mile or kilometer with the Cool Running pace calculator. Metric conversions giving you fits when you try to figure out your 10K race pace? Getting headaches from trying to figure out whether you ran a 7:18 or 7:21 pace? Leave the math to us with our nifty pace calculator. Plan your race pace and splits, figure out how far you ran based on your estimated pace, or calculate the pace of your last training run.