UD5 Toolkit
Barbell Plate Load Calculator – Online Weight Room Math
Enter target total weight and bar weight to see which plates to put on each side. No more counting errors.
Sports & Exercise Tools
35+ toolsDisc Golf Bag Builder – Online Select Discs & Visualize Flights
Add discs by speed, glide, turn, fade to build a balanced bag. See slot gaps. Print your in‑the‑bag list.
Bow Sight Pin Gap Estimator – Online Multi‑Pin Setup Tool
Enter your first pin distance and arrow speed to estimate gaps for 30, 40, 50, 60 yard pins. Start practice.
Skateboard Wheel Durometer Selector – Online Surface Match
Choose your riding surface (street, park, vert, rough) and get a recommended wheel hardness (78A‑101A) and size.
Ski Binding DIN Calculator – Online Weight, Height, BSL, Skier Type
Enter your weight, height, boot sole length, and skier type to see the recommended DIN release setting.
Overgrip Length Calculator – Online Racket Handle Wrapping
Measure your handle circumference and preferred overlap to see how long your overgrip tape needs to be.
Golf Handicap Differential Calculator – Online Score to Index
Enter adjusted gross score, course rating, and slope to calculate the round's handicap differential. Track your index.
Arrow Spine Selector – Online Draw Weight & Point Weight Tool
Enter your bow's draw weight, arrow length, and point weight to find the correct arrow spine. Essential for tuning.
SCUBA Gas Consumption Planner – Online SAC Rate & Tank Volume
Enter your Surface Air Consumption rate and planned depth to estimate how long a cylinder will last. Dive safely.
Surfboard Volume Estimator – Online Dimensions to Liters
Enter length, width, thickness to approximate surfboard volume. Compare to your ideal volume based on weight.
Kayak Weight Capacity Calculator – Online Paddler + Gear Limit
Enter kayak's maximum capacity and your weight to see remaining capacity for gear. Safety on the water.
Ski Wax Temperature Guide – Online Nordic & Alpine Glide Wax
Enter air and snow temperature plus humidity to get the right glide wax color (Swix/Toko). Perfect kick and glide.
Digital Swim Pace Clock – Online Interval Training Timer
Large screen pace clock with programmable send‑offs. Perfect for masters swimming workouts. Confirms your rest time.
Wetsuit Thickness Selector – Online Water Temp & Activity
Enter water temperature and activity to get recommended wetsuit thickness (2/3mm to 6/5mm). Stay comfortable.
Discus Optimal Release Angle Calculator – Online Physics Estimator
Enter release height and speed to compute the optimal launch angle for maximum distance. Simple projectile model.
Climbing Grade Converter – Online V‑Scale to Font & YDS
Convert climbing difficulty between V‑scale, Fontainebleau, and Yosemite Decimal System. Quick reference for gym climbers.
Wing Loading Calculator – Online Skydiving & Paragliding Safety
Enter your exit weight and canopy size to calculate wing loading. Helps determine if you're within the safe recommended range.
Yoga Mat Thickness Selector – Online Joint & Surface Needs
Answer questions about sensitivity, surface, and travel to get the ideal mat thickness.
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.
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.
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.
Running 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).
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.
Skateboard Deck Size Selector – Online Shoe Size & Style
Select shoe size and riding style to get recommended deck width. Visual comparison.
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.
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.
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.
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.
Bike Saddle Height Calculator – Online Inseam Method
Enter your inseam length to get suggested saddle height using the LeMond or 109% method.
Tennis Scoring Simulator - Online Point Tracker
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
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.
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.