Relay Exchange Zone Calculator

International zone placement and timing.

Race type

Incoming runner speed

m/s

Outgoing runner top speed

m/s

Outgoing acceleration time

Exchange number

Tab to move between fields

Go Mark Distance

4.23 m

≈ 2 adult heights

Exchange Point in Zone2.33 m

Exchange Point %11.7%

Outgoing Speed at Exchange9.5 m/s

Speed Match100%

Time to Speed Match1.74 s

Exchange Window0.71 s

Exchange Window Length6.78 m

Incoming Speed at Zone9.5 m/s

Total Zone Length30 m

Time Saved (fly start)0.32 s

QualityGood

How to Use This Calculator

How the result changes with Incoming runner speed

Race type: 1 = 4x100m relay, 2 = 4x400m relay.
Incoming runner speed: Top speed of the incoming baton carrier.
Outgoing runner top speed: Top speed of the outgoing runner.
Outgoing acceleration time: Time for outgoing runner to reach top speed from standing.
Exchange number: Which exchange: 1st, 2nd, or 3rd.

Go Mark Distance: Where to place check mark — distance before zone that triggers outgoing runner to start.
Exchange Point in Zone: Where the actual handoff should occur within the exchange zone.
Exchange Point %: Exchange position as percentage through the zone.
Outgoing Speed at Exchange: Outgoing runner's speed at the moment of baton exchange.
Speed Match: How well the two runners' speeds match at exchange (higher = cleaner).
Time to Speed Match: Time from outgoing runner start to speed match point.
Exchange Window: Time window where speeds are within 10% of each other.
Exchange Window Length: Distance window for clean exchange.
Incoming Speed at Zone: Incoming runner speed when entering the zone.
Total Zone Length: Total zone length including fly zone.
Time Saved (fly start): Estimated time saved by the flying start exchange.

Identify Input Parameters
4 parameters
Race type = 1, Incoming runner speed = 9.5, Outgoing runner top speed = 9.8, Outgoing acceleration time = 1.5 = 5 input(s) provided
Calculate Go Mark Distance
Go Mark Distance = distIncoming - distOutgoing
4.23 = 4.23
Calculate Exchange Point in Zone
Exchange Point in Zone = distOutgoing - flyZoneLength
2.33 = 2.33
Calculate Exchange Point %
Exchange Point % = (exchangePointFromZoneStart / exchangeZoneLength) * 100
11.7 = 11.7