Free calculators to help you train smarter and race faster
🎯Race Pace Calculator
Enter your target finish time and distance, and instantly see your required pace per mile or kilometer — plus splits for every mile marker. No more mental math at mile 18.
Perfect for: Race day planning, pacing strategy, setting realistic goals
[Calculate Your Race Pace →]
🔮 Finish Time Predictor
Perfect for: Setting goal times, choosing your next race distance, understanding your fitness level
[Predict Your Finish Time →]
💪Training Zones Calculator
Perfect for: Structuring training weeks, avoiding burnout, building aerobic base
[Find Your Training Zones →]
👟 Shoe Mileage Tracker
Running in worn-out shoes is a fast track to injury. Track your mileage and get a heads-up when your shoes are ready for retirement, typically between 300-500 miles depending on your shoe, weight, and running surface.
Perfect for: Injury prevention, budgeting for new shoes, getting the most from your gear
[Track Your Shoe Mileage →]
Hey runners! Whether you’re chasing your first 5K or gunning for a marathon PR, these tools are here to take the guesswork out of your training. No more scribbling pace math on your hand mid-run.
Your Training Just Got Easier
Let’s be honest running is simple, but the math behind it? Not always.
What pace do I need to hit my goal time? How fast should my easy runs actually be? When do I need new shoes? These are questions every runner asks, and now you’ve got instant answers.
I built these calculators because I got tired of Googling the same things over and over. They’re the tools I wish I had when I started taking my training seriously. Simple, fast, and actually useful just like a good training partner.
Why These Tools Actually Matter
Here’s the thing running by feel is great, but data helps you run smarter. These calculators aren’t about overcomplicating your training. They’re about giving you confidence.
Confidence on race day: knowing your goal pace is realistic because you’ve done the math.
Confidence in training: understanding why Tuesday’s tempo run is faster than Sunday’s long run.
Confidence in your gear: replacing shoes before they wreck your knees, not after.
The best runners aren’t just fit — they’re informed. These tools help you become both.
Frequently Asked Questions
Are these running calculators accurate?
Yes! Our calculators use established formulas trusted by coaches and athletes worldwide including the Riegel formula for race predictions and standard VDOT-based training zones. That said, every runner is unique. Use these as guidelines, not gospel.
Which calculator should I use first?
Start with the Finish Time Predictor if you have a recent race result. It’ll give you realistic goal times for your next race. Then use the Race Pace Calculator to map out your splits and the Training Zones Calculator to structure your training.
How often should I replace my running shoes?
Most running shoes last 300-500 miles, but this varies based on your weight, running surface, and the shoe itself. Our Shoe Mileage Tracker factors these in to give you a personalized estimate.
Do I need a GPS watch to use these tools?
Nope! While a GPS watch helps you track pace during runs, you can use these calculators with just your race times and distances. They’re designed to be simple and accessible.
Can I use these for trail running or ultramarathons?
Absolutely. The calculators work for any distance. Just keep in mind that trail and ultra pacing is more variable due to terrain and elevation — use these numbers as a baseline and adjust for conditions.