World Online Converters

Weights / Measures / Time Calculators

• Convert It!
• Conversion Factors
• Cooking Measures and Conversion Calculator
• Cost-of-living calculator
• Currency converter
• How Far Is It?
• Martindale's Calculators Online Center
• Measure 4 Measure
• Measurement Units Translation
• Megaconverter
• Weights and Measures - Refdesk
• World Wide Metric Calculators
• A Walk Through Time - the evolution of time measurement
• Aztec Calendar - describes the sacred Aztec calendar, and can tell you what date it is according to that calendar.
• Calculate Day of Week - Calculate the Day of the Week for a Given Date from 1 January 1583 to 31 December 4000.
• Calendars and their History - reprinted from the Explanatory Supplement to the Astronomical Almanac.
• Calendar Conversions - Convert dates into corresponding days in different calendar systems.
• Calendars by Tat - Free printable monthly calendars.
• Calendar - Perpetual - Just plug in the year for a calendar of that year.
• Calendar Studies - covers the Mayan, Goddess Lunar, Gregorian, Julian and other lunar calendars. Includes DOS software to convert dates.
• Compute Sunrise, Sunset Worldwide - site calculates sunrise, sunset for anywhere in the world, on any date.
• Countdown to the Millennium - U.S. Naval Observatory
• Daily Almanac - Who was born and what happened on any given day
• Daylight Saving Time, Its History and Why We Use It - information on why we save daylight, the history of Daylight Savings Time, and when it starts and stops each year between 1990 and 2004.
• Earth Calendar - A daybook of holidays and celebrations around the world. Holidays are listed by date, country, and religion.
• Horology - The science of time, timekeepers (watches, clocks) and timekeeping.
• How Radio-Controlled Clocks Work - By now, you have probably seen or own a radio-controlled clock. These clocks are sold in all forms: as wall clocks, desk clocks, travel alarms, and wristwatches. They have a tremendous advantage over conventional clocks, they are always right! When working properly, radio-controlled clocks always display the correct time, down to the exact second. And you never have to adjust them. This site explains how these clocks work.
• Literary Calendar - almanac of literary information in a this-day-in-history format. Browse specific days, search the entries, or join the mailing list for daily e-mails of historical tidbits.
• Local Times Around the World
• Moon Info
• NIST Time and Frequency Division Hompage - develops and operates standards of time and frequency
• Number of Days Between Dates - Calculate the number of days between two dates.
• Official U.S. Time - National Institute of Standards and Technology
• One-World Global Calendar
• Phases of the Moon
• Quartz Watch, The - Ever wonder how a watch works? Discover the fascinating stories behind the invention of the quartz watch. This Smithosian Institution site provides history and background information on quartz clocks.
• Roman Calendar - what day is it really? This Roman Calendar reconstruction will tell you what ancient holiday today is, as well as what day your birthday was.
• Sun and Moon Data for One Day - obtain the times of sunrise, sunset, moonrise, moonset, transits of the Sun and Moon, and the beginning and end of civil twilight, along with information on the Moon's phase.
• Sunrise/Sunset Computation
• The Third Millennium - The end of the second millennium and the beginning of the third will be reached on January 1, 2001. This date is based on the now globally recognized Gregorian calendar, the initial epoch of which was established by the sixth-century scholar Dionysius Exiguus, who was compiling a table of dates of Easter. Rather than starting with the year zero, years in this calendar begin with the date January 1, 1 Anno Domini (AD). Consequently, the Third Millennium does not begin until January 1, 2001 AD.
• TimeTicker - shows the exact time for every place on earth; shockwave plugin must be installed.
• Today Date and Time - today's date in various calendars and eras. Links to "today" info throughout the Web. Celestial and astronomical info.
• WWW Tide and Current Predictor
• World Clock, The - Automatically updated every minute
• World Public Holidays Database
• Worldtime - interactive world atlas, providing information on local time and public holidays for all countries.
• World Time Zone - local time in every country in the world; each local time is fully adjusted for their own specific daylight savings time
• World Time Zone Map
• World Wide Holidays and Festival Page
• Conversion of Units - Convert temperature, measurement, heat and energy units, as well as time, velocity and currency.
• Cooking Measures and Conversion Calculator
• Currency Calculator
• Dictionary of Units, A - an explanation of the principal systems of units, their history, standards, and conversion factors for changing from one to the other.
• Dictionary of Units of Measurement
• Directorate of Time - The U.S. Naval Observatory is the official source of time used in the United States.
• Greenwich Mean Time (GMT)
• Horology - The science of time, timekeepers (watches, clocks) and timekeeping.
• How Far Is It? - - distances between 500 cities worldwide plus very basic information about each location
• International Standard Date and Time Notation - specifies numeric representations of date and time.
• Measurements Converter - friendly JavaScript interface converts length, weight, area, speed, temperature and more, into different units and unit systems.
• Measurement 4 Measure - A collection of sites that estimate, calculate, evaluate, translate,etc.
• Megaconverter
• Metric Conversion Card - Use this easy chart to convert inches to centimeters, pounds to kilograms, Fahrenheit to Celsius, and more.
• NIST Time and Frequency Division - develops and operates standards of time and frequency
• North American Time Zones and GMT
• Periodic Table of the Elements
• Pictorial Periodic Table, The - growing database, searchable by text or property: Lynx friendly yet modern browser enhanced and it's fun, too.
• Temperature Conversion Calculator - Convert from and to - Fahrenheit, Celsius, Kelvin, Reaumur, and Rankine.
• Time Server - clock synchronization at U.Delaware
• Unit Conversion Factors
• Universal Currency Converter, The - allows you to perform interactive foreign exchange rate conversion on the Internet.
• U.S. Metric Association (USMA) - national non-profit organization, founded in 1916, which advocates U.S. conversion to the International System of Units (SI), also called the modern metric system.
• Visual Elements - featuring computer-generated images that interpret the 109 entries of the periodic table
• Walk Through Time, A - the evolution of time measurement.
• What time is it? - current time, from the US Naval Observatory Master Clock.
• World Time Zones
• World Time Zones Maps with Current Time
• Usenet - alt.horology