Marathon Target & Half Marathon Calculator

Marathon Target Calculator

Convert target marathon times to required half marathon qualifiers based on race fade data
MILES
KMS
Target Marathon Goal
HOURS
MINUTES
SECONDS
Slowdown Rates (% Fade)
CONSERVATIVE %
REALISTIC %
VERY AGG. %
* Conservative: Higher slowdown baseline (7.2% Mean). Requires fastest HM.
* Realistically Aggressive: Standard median slowdown (6.0% Median).
* Very Aggressive: Strong endurance & execution (2.64% Slowdown).
Required Half Marathon targets for a --:--:-- marathon goal:
--:--:-- in the half would make a --:--:-- marathon a conservative goal.
Required HM Pace: --:-- / mi Marathon Pace: --:-- / mi Built-in Drop-off: -- sec / mi Assumed Slowdown: 7.2%
--:--:-- in the half would make a --:--:-- marathon a realistically aggressive goal.
Required HM Pace: --:-- / mi Marathon Pace: --:-- / mi Built-in Drop-off: -- sec / mi Assumed Slowdown: 6.0%
--:--:-- in the half would make --:--:-- a very aggressive goal.
Required HM Pace: --:-- / mi Marathon Pace: --:-- / mi Built-in Drop-off: -- sec / mi Assumed Slowdown: 2.64%
Target Pace Comparison Across Tiers
Benchmark Target Matrix
Marathon Goal Conservative HM Target Realistically Aggressive HM Very Aggressive HM Target Target Pace
```