Anchor Rode Length Calculator
Rode feet from depth, bow height, and scope.
Sports and Pace
Running pace, speed, and race time estimates.
Archery Draw Length Calculator
Draw length from wingspan for starters.
Badminton Court Size Calculator
Badminton court dims, area, and net heights.
Barbell Plate Calculator
Plates per side for any barbell target in kg or lb.
Baseball Field Size Calculator
Baseball bases, pitching, and diamonds by division.
Batting Average Calculator
AVG, OBP, and SLG from hits, at-bats, walks, and power.
Bike Frame Size Calculator
Road and MTB frames from inseam.
Bocce Court Size Calculator
Bocce court dims, area, and boards.
Bowling Handicap Calculator
League handicap, per game, and series from average and basis.
Chess Clock Time Calculator
Add base minutes and per move increment to get total game time for a move count.
Chess Rating Calculator (Elo)
Win chance and rating points at stake from two Elo ratings.
Chess Score Calculator
Turn wins, draws, and rounds into match points, record, and score percent.
Chess Tournament Rounds Calculator
Turn player count into Swiss rounds needed plus min and max players per round count.
Climbing Grade Converter
YDS to French and UIAA climbing grades.
College QB Rating Calculator
NCAA passing efficiency from attempts, yards, TD, and picks.
Cooper Test Calculator (12 Minute Run)
VO2 max estimate and fitness band from your 12 minute run distance.
Cornhole Court Calculator
Cornhole board spacing, deck, and hole specs.
Course Handicap Calculator
Course Handicap from Handicap Index, slope, rating, and par per WHS rules.
Cricket Run Rate Calculator
Current and required run rates with balls left, done right.
Cross-Country Ski Length Calculator
Classic and skate ski sizes from height.
Cycling FTP Calculator
Cycling FTP, W/kg, and Zone 2 from 20-minute power.
Cycling Speed Calculator
Average speed and per mile or km pace from ride distance and time.
Darts Average Calculator
3-dart average and 501 pace from scoring.
ERA Calculator
Earned run average with RA9 and earned share from runs and innings.
Golf Handicap Calculator
Single round handicap differential from score, rating, and slope.
Hiking Time Calculator (Naismith Rule)
Trail time from distance and ascent with fitness adjustment and breaks.
Lacrosse Field Size Calculator
Lacrosse field area and goal specs per NCAA rules.
Life Jacket Size Calculator
Life jacket band and type from weight, chest, water, and swim skill.
Marathon Fuel Calculator
Carbs and gels needed for long runs from hours and burn rate.
On-Base Percentage Calculator
Turn hits, walks, and plate trips into on-base percentage with appearances.
One Rep Max Calculator
Estimate your 1RM from any lift and reps using Epley and Brzycki formulas.
Padel Court Size Calculator
Padel court area, enclosure, and wall height per FIP rules.
Pickleball Court Size Calculator
Check court dimensions against the regulation 20 by 44 ft.
Pitch Count Calculator
Little League pitch max, rest, and eligibility.
Pool Table Size Calculator
Pool table playing dims, room size, and area.
Push Up Total Calculator
Turn sets, reps, and training days into session, weekly, and monthly push up totals.
Race Time Predictor (Riegel Formula)
Predict 10K, half, and marathon times from a recent race result.
Rockport Walk Test Calculator
VO2max estimate from a 1-mile walk: time, pulse, age, weight.
Round Robin Games Calculator
Turn team count into total games, rounds needed, and games per team.
Rowing Pace Calculator
500 m split, watts, and speed from any row distance and time.
Rugby Score Calculator
Turn tries, conversions, penalties, and drops into team points and kicking share.
Running Cadence Calculator
Steps per minute from steps and time.
Running Pace Calculator
Pace per km and per mile plus average speed from distance and time.
Running Shoe Replacement Calculator
Shoe miles left, weeks left, and pairs per year.
Running Track Stagger Calculator
400 m and 200 m start staggers by lane.
Sailboat Hull Speed Calculator
Sailboat hull speed in knots, mph, m/s.
Scuba Air Consumption Calculator
SAC rate and air volume use from tank pressures and depth.
Soccer Field Size Calculator
Check field dimensions against adult, international, and youth bands.
Softball Field Size Calculator
Softball bases, pitching, and ball by division.
Squash Court Size Calculator
Squash court area, diagonal, and tin for singles and doubles formats.
Squash Points to Win Calculator
Turn the current game score into points needed with PAR to 11 win by 2.
Stableford Points Calculator
Turn golf scores by type into Stableford points with holes and target gap.
Steps to Distance Calculator
Kilometers and miles from step count and height, plus walking time.
Stride Length Calculator
Step and stride length from distance and steps.
Sweat Rate Calculator
Liters per hour lost from weigh ins and fluids drunk.
Swim Pace Calculator
Pace per 100m and per km plus speed from swim distance and time.
Swim SWOLF Calculator
Swim efficiency score with 100 m pace.
Tabata Timer Calculator
Tabata session time from rounds, intervals, warmup, and cooldown.
Tee-Ball Field Size Calculator
Tee-ball bases and setup per Little League.
Tennis Court Size Calculator
Tennis court dims, area, and net heights, ITF regulation.
Trampoline Safety Zone Calculator
Trampoline clear area with solo, age, pad, and level verdicts.
Triathlon Time Calculator
Total finish time with leg shares from swim, bike, run splits.
Vertical Jump Calculator
Jump height and takeoff speed from flight time, metric or imperial.
VO2 Max Estimator (No Exercise Test)
VO2 max from age and resting heart rate, plus Cooper equivalent.
Volleyball Court Size Calculator
Volleyball court dims, area, and net height.
WHIP Baseball Calculator
Walks plus hits per inning pitched.
Wilks Score Calculator
Wilks relative-strength score from bodyweight and total.