Sports
Race time prediction from a known result, baseball batting and pitching stats, and bicycle gear ratios. The race predictor uses Riegel's formula and is honest about how far you can extrapolate it.
Race Time PredictorPredict your 5K, 10K, half-marathon and marathon times from any recent race result using the Riegel formula, with target paces per km.Baseball Stats CalculatorCalculate batting average, OBP, SLG and OPS plus pitching ERA, WHIP and K/9 — with proper baseball innings notation (6.1 = 6⅓ IP).Bike Gear CalculatorWork out gear ratio, speed at any cadence and gear inches from chainring, cog and wheel size — or paste a whole cassette for a full gear table.