UD5 Toolkit
Disc Golf Putting Probability Calculator - Online C1X/C2 Stats
Estimate make probability of a putt based on distance and skill rating. For disc golf enthusiasts. Fun statistical tool, no data upload.
Sports & Exercise Tools
15+ toolsRunning Shoe Size Converter - Online US UK EU CM Chart
Convert running shoe sizes between US (men/women), UK, EU, and centimeters. Also includes brand-specific fit notes (general guide).
Golf Handicap Calculator - Online Quick Index Estimator
Enter recent scores, course rating, and slope to estimate a golf handicap index. Simple formula for unofficial tracking. Local only.
Bowling Score Calculator - Online Frame by Frame Tracker
Enter pins per roll and calculate total bowling score including strikes and spares. Supports 10 frames. Learn scoring rules visually.
Erg Stroke Rate & Split Predictor – Online Concept2 Pace Chart
Enter distance and time to get your 500m split. Also predicts how a change in stroke rate affects power output.
Tennis String Tension Guide – Online Racquet, String & Play Style
Select your racquet head size, string type, and play style to get a recommended tension range. Find your sweet spot.
Golf Club Distance Logger – Online Track Average Carry per Club
Record shot distances for each club and see averages. Identify gaps in your bag. Local storage.
Candlepin Bowling Score Calculator – Online Small Ball Scoring
Keep score for candlepin bowling with its unique rules. No strike carries automatic strikes. For New England enthusiasts.
Swim Pace Calculator - Online 100m / 100yd Time Predictor
Calculate swim pace per 100m or 100yd based on total time and distance. Predict race times. For pool and open water swimmers.
Snowboard Stance Width Finder – Online Height & Riding Style
Enter your height and riding style to get a recommended stance width and binding angles. Centered and balanced.
Tennis Scoring Simulator - Online Point Tracker
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
Bike Fit Calculator - Online Saddle & Frame Size
Enter your body measurements and get approximate bike frame size, saddle height, and reach. For cyclists. Local.
Bike Gear Inch & Ratio Calculator - Online Cycling Tool
Calculate gear inches, meters of development, and speed ratio for any chainring/cog combination. For cyclists.
Running Splits Calculator - Online Race Pace Predictor
Enter a recent race time and predict times for other distances. Also get lap splits for different intervals.
Ultra Marathon Pace Band Generator - Online Print Splits
Generate a printable pace band for ultra distances with mile/km splits and cumulative time. Adjust for terrain.