Speedrun Split Time Calculator

How Speedrun Timing Works

Speedruns are timed using splits — checkpoints throughout a run. Each split records the cumulative time elapsed since the run started, not just the segment time. Your split tool (like LiveSplit) automatically records the time when you press your split key at each checkpoint.

Segment time is the time taken for one section, calculated by subtracting the previous split total from the current one. Running total is the cumulative elapsed time at that checkpoint.

Real Time Attack (RTA) measures wall-clock time from the moment gameplay starts to the final input. In-Game Time (IGT) uses the game's internal timer, which may pause during loads. Many leaderboards accept both, with IGT preferred when loads vary between systems.

Sum of Best (SoB) is the theoretical fastest run — adding your best-ever time in each individual segment. A real run will always be slower than SoB because runs cannot be perfectly optimal in every segment simultaneously.

Potential Time Save (PTS) is SoB subtracted from your current PB total — it shows how much time you could theoretically save if you achieved your best split in every segment.