Run Pace Calculator & Splits

Enter any two of pace, time, or distance and get the third instantly. Perfect for 5K, 10K, half, and full marathons. No account, no ads.

Need your running pace in seconds? Enter any two of pace, time, or distance and PaceCalc instantly solves the third — in kilometers or miles, with speed shown in both km/h and mph. No guessing, no spreadsheet math.

Most pace tools stop at one number. PaceCalc goes further: it forecasts every race distance from a single result, builds a segment-by-segment split plan for race day, and keeps a history of every calculation you save — so the number you need is always one tap away.

WHAT YOU GET

• Instant pace, time, or distance from the other two, in km or miles
• Speed readout in km/h and mph on every result
• Race finish predictions from 1K to 100K ultra using the proven Riegel model
• Even, negative, and positive split tables for any distance
• A saved history of your calculations to revisit and compare
• Built-in coaching articles on pacing, splits, and training zones

PERFECT FOR

• 5K and 10K runners chasing a personal best
• Half and full marathon racers planning goal pace
• Treadmill and track athletes dialing in tempo and intervals
• Coaches setting split targets for their runners

WHY NOT JUST USE A GENERIC CALCULATOR? A phone calculator gives you one division. PaceCalc understands running: it converts pace between km and miles correctly, predicts your finish across every distance, and lays out the exact splits to hit your goal — something a stopwatch and a notepad can't do in one place.

PRIVACY Everything runs on your device. No account, no sign-up, no ads, and nothing about your training is uploaded.

FULL ACCESS The pace calculator is free to use. Unlocking Pro adds the race finish predictor, the split-time planner, and unlimited saved history — available as a weekly or yearly subscription, or a one-time lifetime purchase. Manage or cancel anytime in your App Store settings.

Punch in your numbers and get your pace right now.

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