⌛
🏃
Calculate Race Splits
Add or subtract running, swimming, or cycling lap times for training analysis.
ログイン不要
Formats: HH:MM:SS (e.g. 01:30:45) or HH:MM (e.g. 02:15)
Result
02:15:30
2h 15m 30s · 8130 seconds total
135.50
minutes
2.258
hours
8,130
seconds
Race Splits tips
🏃
For marathon training, calculate target paces — total time / planned splits.
💡
Sum repeated interval durations to verify your training session totals.
🎯
Use "Time between" for split analysis — how long from mile 13 to mile 20?
使い方
1
入力
Enter your data into the tool above. Everything stays local to your browser.
2
処理
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
ダウンロード
Get your result instantly. Nothing is stored after you leave the page — complete privacy.
なぜ私たちのツール？
✓完全に無料 — 隠れたコストは永遠にありません
✓アカウント、メール、ログイン不要
✓ファイルがデバイスを離れることはありません
✓ファイルサイズの制限は一切ありません
✓出力に透かしなし
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