Free Unit Converters & Printable Charts
Exact answers for everyday units: lbs to kg, cm to inches, Celsius to Fahrenheit, cups and spoons, ring and shoe sizes. Every converter shows the formula and comes with a chart you can print.
Most used converters
mm to Inches1 mm = 0.03937 inCelsius to Fahrenheit°F = °C × 9/5 + 32lbs to kg1 lb = 0.4536 kgInches to cm1 in = 2.54 cmoz to lbs1 oz = 0.0625 lbMeters to Feet1 m = 3.2808 ftFahrenheit to Celsius°C = (°F − 32) × 5/9cm to Inches1 cm = 0.3937 inGrams to oz1 g = 0.03527 ozkg to lbs1 kg = 2.2046 lbml to oz1 mL = 0.03381 fl ozFeet to Meters1 ft = 0.3048 mkm/h to mph1 km/h = 0.6214 mphSquare Feet to Square Meters1 sq ft = 0.0929 m²MB to GB1 MB = 0.001 GBHP to kW1 hp = 0.7457 kW
Holiday countdowns
All countdowns →Printable charts
Ring Size ChartUS, UK, EU and Japan sizes with diameter and circumference, plus a print-at-home ring sizerShoe Size Conversion ChartUS, UK, EU and Japan shoe sizes for women and men, with foot lengthKids' Shoe Size ChartBaby, toddler and big-kid sizes in US, UK, EU and Japan with foot lengthCooking Conversion ChartCups, spoons, ounces, grams and oven temperatures on one pageMetric Conversion ChartUS ↔ metric for length, weight, volume, area and temperature, plus metric prefixesInches to mm ChartFractions from 1/64 in, decimals and millimetersCelsius to Fahrenheit ChartWeather, body and cooking temperaturesMilitary Time Chart24-hour clock to 12-hour AM/PM
Calculators
Percentage CalculatorFour percentage calculations in one place. Type in any box and the answer…Date CalculatorCount the days between two dates, or find the date a number of days, weeks…Hours CalculatorEnter a start and end time to get the hours between them, in hours and minutes…Work Hours CalculatorWork out a working day with lunch and breaks, then see the weekly and yearly…Time Card CalculatorFill in the week, and the time card totals your hours, splits regular and…Concrete CalculatorWork out how much concrete a slab, footing or post hole needs, in cubic yards…Square Footage CalculatorMeasure each room or area in feet and inches. The calculator adds them up and…Tip CalculatorWork out the tip and split the bill. Pick a common tip or type your own percent.
Quick answers
How many ounces in a pound?16 ouncesHow many grams in an ounce?28.35 gramsHow many pounds in a ton?2,000 poundsHow many ounces in a cup?8 US fluid ouncesHow many cups in a quart?4 US cupsHow many teaspoons in a tablespoon?3 teaspoonsHow many ounces in a gallon?128 US fluid ouncesHow many liters in a gallon?3.785 litersHow many quarts in a gallon?4 US quartsHow many tablespoons in 1/4 cup?4 tablespoons
All converters
LengthConvert inches, centimeters, millimeters, feet, meters, miles and more. Every…WeightConvert pounds, kilograms, ounces, grams, stone and tons, with exact factors…TemperatureConvert Celsius, Fahrenheit and Kelvin for weather, cooking and fever checks.VolumeUS cups, tablespoons, teaspoons, fluid ounces, milliliters, liters and…AreaSquare feet, square meters, acres and hectares for floor plans, land and…SpeedConvert km/h, mph, knots and m/s.TimeConvert hours, minutes, seconds, days, weeks and years.PressureConvert psi, bar, kPa and atm for tires, compressors and weather.EnergyConvert kcal, kJ, kWh, joules and BTU.PowerConvert horsepower, kilowatts, watts and BTU/h.Data storageConvert MB, GB, TB and the binary GiB that Windows shows.Fuel economyConvert MPG and L/100 km. The units work in opposite directions, so the…AngleConvert degrees, radians and gradians.ForceConvert newtons, pound-force and kilogram-force.