Are indoor times slower than outdoor?

Generally yes, but only slightly. Indoor tracks (200m) have tighter bends than outdoor tracks (400m), which costs time. However, the lack of wind indoors can be an advantage. The net effect is typically 0.3-0.5% slower indoors.

How do I convert 1500m to mile time?

The mile is 109.34m longer than 1500m. A rough conversion adds approximately 17-20 seconds for elite athletes and 20-25 seconds for recreational runners. The calculator uses pace extrapolation with a fatigue factor.

Why are indoor 200m times not directly comparable to outdoor?

Indoor 200m races are run entirely on bends (one full lap of a 200m track), whereas outdoor 200m includes a straight section. The constant turning indoors reduces speed. However, the lack of wind means times are often similar.

Can I compare 3000m and 5000m times?

Yes, using the Riegel formula. A 3000m time can predict a 5000m time and vice versa. The conversion accounts for the increased fatigue factor at longer distances.

RunCalcs

Track Conversion Calculator — Indoor/Outdoor Time Conversion

Convert times between indoor and outdoor track distances.

Convert From

Convert To

Time (Minutes)

Time (Seconds)

How We Calculate This

Track Time Conversion

Conversions use research-based adjustment factors:

Indoor/Outdoor: accounts for bend tightness and wind effects

Distance conversions: use the Riegel formula (T2 = T1 x (D2/D1)^1.06)

1500m to Mile: pace extrapolation with distance-specific fatigue

Each conversion factor is derived from analysis of historical performances at both indoor and outdoor competitions.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always consult a coach or medical professional for personalised training advice.