Frequently Asked Questions
What is a good 5K finish time for a beginner?
A beginner completing a 5K in under 40 minutes (about 12:52 min/mi) has done well. Most recreational runners target under 30 minutes (9:39 min/mi). Times under 25 minutes represent solid intermediate fitness.
Why are my marathon projections faster than my actual marathon time?
This tool projects linearly from your current pace. In a marathon, glycogen depletion around mile 20 (the 'wall'), cumulative muscle damage, and heat stress all cause most runners to slow significantly in the final third. Using Riegel's fatigue formula with a 1.06 exponent gives more realistic long-distance projections.
How do I convert between miles and kilometers for pace?
Divide a min/mile pace by 1.60934 to get min/km. For example, 8:00 min/mi = 8:00 ÷ 1.60934 ≈ 4:58 min/km. Alternatively, multiply min/km by 1.60934 to convert back to min/mi.
How do I improve my running pace?
Mix easy aerobic mileage (about 80% of your runs) with interval work at race pace or faster (20%) and one weekly tempo run at a comfortably hard effort. Consistent weekly mileage and adequate recovery drive long-term pace improvements.
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General information only. Not medical advice.
Health & Medical Disclaimer: General information only. Not medical advice.
This calculator provides general health information only and is not medical advice. Results do not replace professional medical evaluation or diagnosis. Consult a licensed healthcare provider before making health decisions. Always seek immediate medical attention for emergencies.