Free running, triathlon and cycling calculators
Quick answers to the numbers you need before a race: paces, predicted times, zones and how long a ride will take. Each one uses the same rules as our training plans, needs no account, and gives you a link you can keep or share.
Running
Pace calculator
What pace do I need to run a 3:30 marathon?
Race time predictor
What does my 5K time say about my marathon?
Training paces
How fast should my easy runs and tempo runs be?
Pace converter
What treadmill speed is a 10-minute mile?
Triathlon
Triathlon finish time
How long will my Ironman take?
Swim pace and CSS
What is my critical swim speed?
Heart rate zones
What are my heart rate zones? For runners, riders and triathletes.
Cycling
Power zones (FTP)
What are my power zones from my FTP?
Ride time calculator
How long does a century ride take?
Ready for the whole picture? Build a free training plan from your own training, schedule and race date.