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Everyday Life Calculators
Free everyday calculators: tip and bill split, recipe scaling, cooking conversions, electricity cost, unit price comparison, pet age and more.
Audiobook Speed CalculatorHow long an audiobook or podcast takes at 1.25×, 1.5×, 2×…Bill Split CalculatorSplit a bill evenly with tip, and round shares up if you like.Cat Age CalculatorCat years to human years, with your cat’s life stage.Circle Skirt CalculatorWaist radius and cutting radius for a full, half or quarter circle skirt.Coffee Ratio CalculatorHow much ground coffee for your water, at any brew ratio.Coin CalculatorAdd up a jar of US coins by count — value, number and weight.Coin Flip Probability CalculatorThe odds of getting a number of heads in a series of coin flips.Cups to Grams CalculatorConvert cups to grams (and back) for flour, sugar, butter and more.Dice Probability CalculatorThe odds of rolling a total with any number of dice.Dog Age CalculatorDog years to human years, adjusted for your dog’s size.Dog Pregnancy CalculatorYour dog’s due date and key dates from the day she was mated.Electricity Cost CalculatorWhat an appliance costs to run per day, month and year.mL to Grams CalculatorConvert milliliters to grams (and back) by ingredient density.Party Drink CalculatorHow much beer, wine, liquor and ice to buy for a party.Pizza CalculatorHow many pizzas to order for your group.Recipe ScalerScale ingredient amounts up or down for a different number of servings.Ring Size ConverterConvert ring sizes between US, UK, EU, Japan and millimeters.Shoe Size ConverterConvert between US, UK and EU shoe sizes and foot length.Tip CalculatorTip, total and each person’s share, with optional rounding up.Turkey Cooking Time CalculatorRoasting time for your turkey by weight, stuffed or unstuffed.