Speedrun Split Time & Pace Calculator

ANA›Life Services Authority›National Calculator Authority›Speedrun Split Time & Pace Calculator

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Speedrun Split Time & Pace Calculator

Calculate split times, segment pace, time saves, and projected finish time for speedruns.

Total Number of Segments/Splits

Personal Best (PB) Total Time (HH:MM:SS)

Number of Splits Completed So Far

Elapsed Time at Last Split (HH:MM:SS)

Calculate Fill in your split data and click Calculate.

// Parse HH:MM:SS or MM:SS or SS into total seconds function speParseTime(str) { if (!str || str.trim() === "") return null; str = str.trim(); const parts = str.split(":").map(p => parseFloat(p)); if (parts.some(isNaN)) return null; if (parts.length === 3) return parts[0]3600 + parts[1]60 + parts[2]; if (parts.length === 2) return parts[0]*60 + parts[1]; if (parts.length === 1) return parts[0]; return null; }

// Format seconds to HH:MM:SS.mmm function speFormatTime(totalSeconds, showMs=false) { if (totalSeconds === null || isNaN(totalSeconds)) return "N/A"; const sign = totalSeconds 0 ? h + ":" : ""; const mStr = h > 0 ? String(m).padStart(2,"0") + ":" : (m > 0 ? m + ":" : ""); const sStr = (h > 0 || m > 0) ? String(sInt).padStart(2,"0") : String(sInt); if (showMs && ms > 0) return sign + hStr + mStr + sStr + "." + String(ms).padStart(3,"0"); return sign + hStr + mStr + sStr; }

Segment Name

PB Split Time

Best Possible

Current Run Split

`; container.appendChild(div); } }

function speCalc() { const resultDiv = document.getElementById("spe_result"); const n = parseInt(document.getElementById("spe_total_segments").value); const pbTotalStr = document.getElementById("spe_pb_total").value; const completedStr = document.getElementById("spe_completed_splits").value; const elapsedStr = document.getElementById("spe_elapsed_time").value;

// Validation if (!n || n 50) { resultDiv.innerHTML = 'Please enter a valid number of segments (1–50).'; return; } const pbTotal = speParseTime(pbTotalStr); if (pbTotal === null || pbTotal Please enter a valid PB total time (e.g. 1:23:45).'; return; } const completed = parseInt(completedStr) || 0; if (completed n) { resultDiv.innerHTML = 'Completed splits must be between 0 and total segments.'; return; } const elapsed = speParseTime(elapsedStr); if (completed > 0 && (elapsed === null || elapsed Please enter a valid elapsed time for completed splits.'; return; }

// Collect split data const rows = document.querySelectorAll(".spe-split-row"); const splits = []; let pbSumCheck = 0; let bestSumTotal = 0; for (let i = 0; i Please enter a valid PB split time for Split \${i+1}.`; return; } pbSumCheck += pbSplit; bestSumTotal += (bestSplit !== null ? bestSplit : pbSplit); splits.push({ name, pbSplit, bestSplit, currentSplit }); }

// ── Core Calculations ──────────────────────────────────────────────────────

// 1. PB cumulative splits (running totals) let pbCumulative = []; let cum = 0; for (let i = 0; i 0 ? (elapsed !== null ? elapsed : currentSplitSum) : 0;

// 6. Time ahead/behind PB at current split const timeDiff = completed > 0 ? (currentTime - pbCumAtCompleted) : 0; // negative = ahead

// 7. Projected finish time (current pace projection) // Method: current_time + sum of PB splits for remaining segments let remainingPBSum = 0; for (let i = completed; i 0 ? currentTime + remainingPBSum : pbTotal;

// 8. Projected finish with best possible remaining let remainingBestSum = 0; for (let i = completed; i 0 ? currentTime + remainingBestSum : bpt;

// 9. Pace ratio (current pace vs PB pace) const paceRatio = completed > 0 && pbCumAtCompleted > 0 ? currentTime / pbCumAtCompleted : 1.0;

// 10. Pace-adjusted projected finish const paceAdjustedFinish = completed > 0 ? paceRatio * pbTotal : pbTotal;

// 11. Per-split analysis for completed splits

let splitRows = "";

for (let i = 0; i \${speFormatDiff(segDiff)}`

`+\${speFormatTime(segDiff)}`;
cumStatus = cumDiff \${speFormatDiff(cumDiff)}`: `+\${speFormatTime(cumDiff)}`; } else if (i No data'; cumStatus = 'No data'; } else { segStatus = 'Pending'; cumStatus = 'Pending'; }

const bestDisplay = s.bestSplit !== null ? speFormatTime(s.bestSplit) : "—"; const timeSave = s.bestSplit !== null ? (s.pbSplit - s.bestSplit) : 0; const timeSaveDisplay = timeSave > 0 ? `\${speFormatTime(timeSave)}` : "—";

splitRows += `

\${s.name} \${speFormatTime(s.pbSplit)} \${speFormatTime(pbCum)} \${bestDisplay} \${timeSaveDisplay} \${currentSplitDisplay} \${currentCumDisplay} \${segStatus} \${cumStatus}

`; }

const aheadBehind = timeDiff \${speFormatDiff(timeDiff)} (Ahead of PB)`: `+\${speFormatTime(timeDiff)} (Behind PB)`;
const projVsPB = projectedFinish - pbTotal;
const projStatus = projVsPB \${speFormatDiff(projVsPB)} vs PB`: `+\${speFormatTime(projVsPB)} vs PB`;
const paceAdjVsPB = paceAdjustedFinish - pbTotal;
const paceAdjStatus = paceAdjVsPB \${speFormatDiff(paceAdjVsPB)} vs PB`: `+\${speFormatTime(paceAdjVsPB)} vs PB`;

resultDiv.innerHTML = ` ### 📊 Speedrun Analysis

Personal Best \${speFormatTime(pbTotal)}

Best Possible Time \${speFormatTime(bpt)} Save: \${speFormatTime(timeSaveAvailable)}

Current Time (\${completed}/\${n} splits) \${completed > 0 ? speFormatTime(currentTime) : "—"} \${completed > 0 ? aheadBehind : "Run not started"}

Pace Ratio \${completed > 0 ? (paceRatio*100).toFixed(2)+"%" : "—"} \${paceRatio 1 ? "Slower than PB pace" : "On PB pace"}

Projected Finish (PB Pace Remaining) \${completed > 0 ? speFormatTime(projectedFinish) : speFormatTime(pbTotal)} \${completed > 0 ? projStatus : "—"}

Projected Finish (Best Remaining) \${completed > 0 ? speFormatTime(projectedBestFinish) : speFormatTime(bpt)} Best-case scenario

Pace-Adjusted Projected Finish \${completed > 0 ? speFormatTime(paceAdjustedFinish) : "—"} \${completed > 0 ? paceAdjStatus : "—"}

Remaining Segments \${n - completed} of \${n} PB time remaining: \${speFormatTime(remainingPBSum)}

#### Split-by-Split Breakdown

Segment PB Split PB Cumul. Best Split Time Save Current Split Current Cumul. Seg Δ Cumul. Δ

\${splitRows}

Δ = difference vs PB. Green = ahead, Red = behind. Cumul. = cumulative (running total) time.

`; }

// Initialize on load speGenerateSplits();

#### Formulas Used

Best Possible Time (BPT): BPT = Σ best_spliti for all i = 1…n

Time Save Available: Time Save = PB_total − BPT

Segment Delta (Δ): Δseg,i = current_spliti − pb_spliti (negative = faster)

Cumulative Delta: Δcum,i = Σ current_splitj − Σ pb_splitj for j = 1…i

Projected Finish (PB Pace Remaining): Projected = elapsed_time + Σ pb_spliti for i = (completed+1)…n

Projected Finish (Best Remaining): Projected_best = elapsed_time + Σ best_spliti for i = (completed+1)…n

Pace Ratio: Pace Ratio = elapsed_time / Σ pb_spliti for i = 1…completed

Pace-Adjusted Projected Finish: Pace_Adjusted = Pace_Ratio × PB_total

#### Assumptions & References

PB Split Time: your personal best time for each individual segment.
Best Possible Split: the fastest you have ever completed that segment (used for BPT/SoBS).
Current Run Split: the time you achieved for that segment in the current run (leave blank if not yet completed).
Elapsed Time: the authoritative timer reading at the last completed split (used for projection accuracy).

Speedrun Split Time & Pace Calculator

Speedrun Split Time & Pace Calculator

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Speedrun Split Time & Pace Calculator

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