Sports & Athletics
Calculators.
Marathon pace, race splits, heart rate zones, and calorie burn — train smarter with data. Race pace, training zones, strength benchmarks, hiking time, and sport-specific stats. The numbers behind every PR — pacing splits, heart-rate zones, 1RM, elevation-adjusted pace, batting averages, and chess Elo.
- You're training for a race and need pacing, splits, or a finish-time prediction.
- You're tracking strength benchmarks (1RM, Wilks, FFMI) and want comparable scores.
- You're playing a sport with its own math (baseball, chess, betting) and want a quick-reference tool.
Pick by what you're deciding
The same pages, grouped by the question you're trying to answer.
Running & racing
Marathon pace, heart-rate zones, race-time prediction, and elevation-adjusted pacing.
Weightlifting & strength
1RM, Wilks score, total, and the bench / squat / deadlift benchmarks.
Hiking, cycling & endurance
Hiking time (Naismith), cycling power-to-weight, and the multi-sport pacing utilities.
Sport-specific stats
Baseball stats, chess rating change, betting math, and racket-sport ratings.
Running & Racing
7 toolsPace charts, split tables, race predictors, elevation adjustments, and calorie burn — every number a runner needs.
Marathon Pace
Finish time from target pace with mile and km splits.
5K / 10K Pace
Race pace and splits for any standard distance.
Heart Rate Zones
Five training zones from max heart rate and resting HR.
Running Calories
Calories burned by distance, pace, weight, and terrain.
Race Time Predictor
Predict your finish time for any race distance using the Riegel formula.
Elevation Running Adjustment
Grade-adjusted pace for hills and altitude — find your equivalent flat pace.
Triathlon Pace
Finish time for Ironman, 70.3, Olympic, and Sprint from swim/bike/run paces.
Age-Graded Running
WMA 2023 age grade percentage — compare performance across age groups.
Swim Split Calculator
Per-100m pace and pool vs open-water adjustment for triathletes.
Hiking
1 toolTrail time estimates, calorie burn, water needs, and difficulty ratings — everything you need to plan a hike with confidence.
Weightlifting
5 tools1RM estimation, strength standards comparison, and training max planning — everything a strength athlete needs.
Deadlift Calculator
7-formula 1RM estimator with strength standards, percentage table, and 5/3/1 training planner.
Squat Calculator
Estimate squat 1RM using 7 formulas, find your strength level, and build a training plan.
Bench Press Calculator
1RM with 4 formulas, warm-up sets, grip corrections, paused/incline adjustments, Wilks/DOTS, 5/3/1 and Smolov Jr planner.
Powerlifting Total
Squat + bench + deadlift total with Wilks, DOTS, and IPF GL Points scoring.
Olympic Weightlifting
Snatch + clean & jerk total with Sinclair score for bodyweight-adjusted comparison.
Baseball
5 toolsSabermetrics-grade baseball calculators — batting average, OBP, OPS, wOBA, BABIP, season projections, and historical comparisons.
Batting Average Calculator
BA, OBP, SLG, OPS, ISO, BABIP, wOBA — plus season projector and HOF comparisons.
OPS Calculator
On-base plus slugging with OPS+ and wOBA — sabermetrics hitting stats.
ERA Calculator
Earned run average, WHIP, FIP, K/9, and ERA+ for pitching analysis.
WHIP Calculator
Walks + hits per inning pitched — the standard pitching efficiency metric.
Fantasy Sports Points
Score your lineup across baseball, football, and other fantasy formats.
Racket Sports
1 toolRacket sport calculators — skill rating, win probability, and rating change estimation using an Elo-style formula for Tennis, Badminton, Squash, Racquetball, and more.
Cycling
1 toolCycling performance calculators — power-to-weight ratio, FTP analysis, and training zone planning.
Chess
1 toolChess performance calculators — Elo rating changes, expected score, and win probability.
Frequently asked questions
How accurate is the race-time predictor?
The Riegel formula is within 1–3% for runners with consistent training between two race distances. Less accurate for huge distance jumps (5K → marathon) or wildly inconsistent training. The calculator flags low-confidence predictions and explains why.
Which 1RM formula is most accurate?
Epley is the default — it tends to slightly under-predict, which is safer for programming. Brzycki is more accurate at lower reps (1–5); Lombardi for higher reps (8+). Each weightlifting calculator lets you switch and shows the differences.
Are these training calculators replacements for a coach?
No. They're for planning the workout you already know how to do safely. Heart-rate zones, pacing, and 1RM math are inputs to a program — they don't replace movement coaching, periodization, or injury triage.
Why include betting calculators?
Because the math (implied probability from odds, parlay payout, expected value of a wager) is a useful application of probability — the same math the statistics hub covers in the abstract. Use responsibly; the calculators are for understanding the odds, not encouraging the bet.