Published Standards
All Sports Calculators
Every tool implements an official governing-body formula with source citations, version records, and transparent mathematical workings.
Golf Handicapping
Handicap Index Calculator
Calculate your estimated WHS Handicap Index from 1–20 score differentials using the official lowest-8 average.
Open Calculator → WHS Rule 6.1 & 6.2Course & Playing Handicap
Compute the exact strokes given on any tee and format allowance using Slope, Course Rating, and Par.
Open Calculator → WHS Rule 5.1aScore Differential Calculator
Determine a single round's differential from Adjusted Gross Score, Course Rating, Slope, and PCC.
Open Calculator →Running & Racing
Running Pace Calculator
Calculate target pace, speed, and finish times in min/km and min/mile across 5K, 10K, Half, and Marathon.
Open Calculator → Riegel & VDOTRace Time Predictor
Predict your equivalent race times across all distances with an adjustable fatigue exponent (1.05–1.08).
Open Calculator → WMA FactorsAge Grading Calculator
Score your running performance against world master standards for your age and sex across 5K, 10K, and Marathon.
Open Calculator →Strength Scoring
Wilks Calculator
Calculate your powerlifting Wilks score in kg or lb with version selector for Original and Wilks-2 coefficients.
Open Calculator → IPF GL & DOTSIPF GL Points Calculator
Calculate official IPF GL points for Classic and Equipped divisions with side-by-side DOTS comparison.
Open Calculator → Epley · Brzycki · LombardiOne-Rep Max Calculator
Estimate your 1RM from reps to failure using three published formulas side by side, with the spread shown.
Open Calculator →