🎯 Auto, Sports and Everyday Calculators

11 free auto, sports and everyday calculators. Gear ratios, tire sizes, sleep cycles, gestation dates, sports stats and game settings.

Gear Ratio CalculatorCalculate gear ratio from tooth counts with output speed and torque, or find vehicle speed from engine RPM, axle ratio and tire diameter.
Engine Displacement CalculatorCalculate engine displacement in cc, liters and cubic inches from bore, stroke and number of cylinders.
Power to Weight Ratio CalculatorCalculate power to weight ratio in hp per pound, hp per ton, watts per kilogram and pounds per horsepower for cars, motorcycles and cyclists.
Tire Size CalculatorCalculate tire diameter, sidewall height, circumference and revolutions per mile from a metric tire size, and compare two sizes with the speedometer difference.
Sleep Cycle CalculatorFind the best time to go to bed or wake up based on 90-minute sleep cycles, so you wake at the end of a cycle and not in the middle of deep sleep.
Animal Gestation CalculatorCalculate the due date for cows, horses, goats, sheep, pigs, dogs, cats and rabbits from the breeding date, with the normal range.
ERA CalculatorCalculate earned run average (ERA) and WHIP for baseball and softball pitchers from earned runs, innings pitched, hits and walks.
Batting Average CalculatorCalculate batting average, on-base percentage, slugging percentage and OPS for baseball and softball from at-bats, hits, walks and extra-base hits.
Winning Percentage CalculatorCalculate winning percentage from wins, losses and ties, and see how many more wins are needed to reach a target percentage.
Mouse Sensitivity ConverterConvert mouse sensitivity between Valorant, CS2, Apex Legends, Overwatch 2, Fortnite and other games, with eDPI and cm per 360.
Nether Portal CalculatorConvert Minecraft Overworld coordinates to Nether coordinates and back, so linked portals line up. One block in the Nether equals eight in the Overworld.

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