Running PR Pace Calculator

Welcome to the Running PR Pace Calculator — a free, easy-to-use tool for runners looking to calculate, predict, or improve their personal record (PR) times across different race distances. Whether you're training for your first 5K or aiming to smash your marathon PR, this calculator can help you hit your pace goals with confidence.

Predict Your Race Time

Based on your current race results, the calculator estimates your potential finish time for a different distance. For example, enter your recent 10K time and get a predicted finish time for a half marathon or marathon — all in seconds.

Improve Your Current PR

Training to beat your best time? Input your existing PR and choose a target improvement. You'll get a precise pace per mile/km to train for and aim at on race day — helping you avoid overtraining or underperforming.

How It Works

Just select your goal, enter your current or target times, choose your distance, and let the calculator do the rest. It uses real-world data and pace models trusted by coaches and elite runners.

Key Features

• ✅ Instant calculations with no login required
• ✅ Supports all standard distances: 5K, 10K, Half, Marathon
• ✅ Mobile-friendly and optimized for training plans
• ✅ Ideal for runners, coaches, and event organizers

Who Should Use This Tool?

This calculator is built for:

• 🏃‍♂️ Runners seeking realistic PR goals
• 📈 Athletes transitioning to longer distances
• 🧑‍🏫 Coaches designing pace-specific training
• 📅 Race organizers offering prep resources

Get Started Now

Use the Running PR Pace Calculator today to guide your training and make your next personal record more achievable. Bookmark this page and share it with your running group or coach — it's completely free to use and always available.