Everyday Life Calculators
Small questions that come up every day, answered properly. Scale a recipe, convert a shoe size, find your dog’s age in human years, plan party food, or work out what an appliance costs to run.
16 calculators
Most used
- Dog Age CalculatorConvert your dog's age into human years using a size-based chart and the newer DNA-methylation formula, and see which life stage your dog is in.
- Electricity Cost CalculatorWork out what an appliance costs to run per hour, day, month and year from its wattage, how long you use it and your electricity rate.
- Recipe ScalerPaste an ingredient list and resize it for any number of servings, with amounts rounded to measures you can actually scoop.
- Shoe Size ConverterConvert shoe sizes between US, UK, EU and centimeter systems for men, women and kids, or find your size by measuring your foot.
Kitchen & food 5
- Caffeine CalculatorTotal the caffeine in your daily coffee, tea, soda and energy drinks, compare it with official guidelines and see how much remains at bedtime.
- Coffee Ratio CalculatorWork out how much ground coffee to use for any amount of water, or how much water for the coffee you have, by brew method.
- Pizza Size CalculatorCompare pizzas by area and price per square inch to see which size, or combination of sizes, gives you the most pizza for your money.
- Recipe ScalerPaste an ingredient list and resize it for any number of servings, with amounts rounded to measures you can actually scoop.
- Turkey Cooking Time CalculatorFind roasting time for a whole turkey by weight from the USDA timetable, with thawing times, a dinner-time plan and safe internal temperatures.
Home & utilities 2
- Electricity Cost CalculatorWork out what an appliance costs to run per hour, day, month and year from its wattage, how long you use it and your electricity rate.
- Water Usage CalculatorEstimate how many gallons of water your household uses a day, where it goes, and how much efficient fixtures could save.
Sizes & fit 3
- Clothing Size ConverterConvert women's and men's clothing sizes between US, UK, European, Italian and Japanese systems, with full size charts.
- Ring Size ConverterConvert ring sizes between US, UK, European and Japanese systems, or find your size from a ring's inside diameter or your finger's circumference.
- Shoe Size ConverterConvert shoe sizes between US, UK, EU and centimeter systems for men, women and kids, or find your size by measuring your foot.
Pets 3
- Cat Age CalculatorConvert your cat's age into human years, from the first months of kittenhood to the senior years, and find its current life stage.
- Pet Calorie CalculatorEstimate how many calories your dog or cat needs a day from weight and life stage, and turn that into cups of food and a treat budget.
- Dog Age CalculatorConvert your dog's age into human years using a size-based chart and the newer DNA-methylation formula, and see which life stage your dog is in.
Life & planning 3
- Party Drinks CalculatorEstimate how much beer, wine, liquor, mixers, soft drinks and ice to buy for a party, converted into cases and bottles.
- Party Food CalculatorPlan how much food to make or buy for a party, from appetizers to dessert, based on guests, party type, length and appetite.
- Wedding Budget CalculatorSplit a total wedding budget across every major category, see cost per guest, and adjust the percentages to match your priorities.
Guides
- How Long to Cook a Turkey: Times by Weight, Thawing and Safe TemperatureAt 325°F, a 12- to 14-pound unstuffed turkey roasts in about 3 to 3¾ hours. See times for every size, how long to thaw and how to know it is done.
- How to Calculate Dog Years in Human Years (Beyond Times 7)The first dog year is about 15 human years, the second about 9 more, then 4 to 7 per year depending on size. Compare the chart method with the epigenetic formula.
- How to Calculate the Electricity Cost of an ApplianceConvert an appliance's watts to kilowatt-hours, multiply by your electricity rate, and you have its running cost. Learn the formula, typical costs and how to cut them.
- How to Calculate Unit Price and Find the Better DealUnit price is the price divided by the quantity, such as cents per ounce. Learn to convert units, compare sizes and deals, and avoid common traps.
- How to Scale a Recipe Up or Down (Without Ruining It)Divide the servings you want by the servings the recipe makes, multiply every ingredient, then tidy the units. Learn the method and the exceptions.