This blog is part of site where you can find unit converters, calculators and other information focused on units of measurement. See menu on the left.

Distance between Earth and Sun

January 13th, 2010

Couple of days ago I was asked, if I know how far is the Sun from the Earth. I realized that I have no idea and I don’t even know if it is half a million, one million, hundred million miles or more.  My answer was: “I don’t know” but, after a while, … hey, hey  I’m able to estimate the distance between Earth and Sun!

I know that the Sun’s light travels to Earth about 8-9 minutes and I know that the speed of light is about 300,000,000 meters per second. By the way, it’s easier to remember the speed of light in metric system because it’s almost round number (exactly 299,792,458 m/s), in miles per second it is 186,282 (about 671 million miles per hour).

So, let’s calculate: (you can use our Online Speed Calculator – Earth To Sun Distance Calculation)
8.5 minutes is equal to 8.5*60 seconds = 510 seconds (let’s make it 500, will be easier to multiply)
Every second light can travel 300,000 kilometers (1 km=1000 meters).
So, the Sun is 500*300,000 kilometers away from the Earth. That gives us 150,000,000 (150 million kilometers)
which is 93,210,000 miles (1 km is equal to 0.6214).

That was the estimation and what is the exact distance from Earth to the Sun?

As we can read in wikipedia Earth’s aphelion (farthest distance beetwen two astronomical objects) is 152,097,701 km, perihelion (closest distance) is 147,098,074 km and the semi-major axis (average distance) is equal to 149,597,887.5 km. So, as you can see, our calculation is very good and approximation error is small.

Useful  tools :

Speed Calculator Online

January 6th, 2010

Today Speed Calculator Online has been launched. This is 3 in 1 calculator. The tool allows you to calculate average speed having traveled distance and time or calculate traveled distance having speed and time or you can fast and easy find traveling time having average speed and traveled distance.

Like all of ours tools (calculator and converters) you will get the answer very fast – the answer is displayed as you type – no button ‘Compute’, ‘Ok’ or ‘Calculate’ is needed.

You can, of course, input your data in different unit of measure. Distance in inches to leagues (US and Imperial system of measurement), millimeters to kilometers (metric system) or even in nautical system (cables, nautical miles and nautical leagues). Speed is displayed or can be inputed in inches, feet, yards, miles, leagues, millimeters, centimeters, decimeters, meters kilometers, nautical miles, cables, nautical leagues per second/minute/hour.


First To Celebrate New Year

December 30th, 2009

2010 is comming. Because the World is divided into time zones, the new year moves progressively around the globe as the start of the day ushers in the New Year. The first country to celebrate New Year is Line Islands (Kiribati, Caroline Island) (time zone UTC+14), the last one are Baker Island, Howland Island (UTC-12).

Here is online tool : What Time is New Year celebrated around the World  that shows to you all time zones and answers the question ‘What Time does particular country or region Celebrate New Year’. If you click on the row in the table, to indicate your time zone,, the tool will show you the time (in your local time) when New Year comes to countries around the World.

As you can see, first country to celebrate New Year 2010 is Line Islands (UTC+14). The people of Line Islands will celebrate New Year, of course, at 0:00 01.01.2010 of their time but at 10:00 am London (UTC+0) time, 20:00 (8:00pm) Melbourne And Sydney time, 5:00am NYC, Toronto, Washington time, 2:00 am  Los Angeles, San Francisco, Las Vegas, Vancouver, Tijuana time, etc.

See also: Calendar 2010 online, Calendar 2010 printable, New Year Webcam list

List of US Federal Holidays 2010

December 29th, 2009
Holiday 2010 Other Years
New Year’s Day Friday, January 1 January 1
Birthday of Martin Luther King, Jr. Monday, January 18 3rd Monday in January
Washington’s Birthday Monday, February 15* 3rd Monday in February
Memorial Day Monday, May 31 Last Monday in May
Independence Day Monday, July 5** July 4
Labor Day Monday, September 6 1st Monday in September
Columbus Day Monday, October 11 2nd Monday in October
Veterans Day Thursday, November 11 November 11
Thanksgiving Day Thursday, November 25 4th Thursday in November
Christmas Day Friday, December 24*** December 25

* This holiday is designated as “Washington’s Birthday” in section 6103(a) of title 5 of the United States Code, which is the law that specifies holidays for Federal employees. Though other institutions such as state and local governments and private businesses may use other names, it is our policy to always refer to holidays by the names designated in the law.
** July 4, 2010 (the legal public holiday for Independence Day), falls on a Sunday. For most Federal employees, Monday, July 5, will be treated as a holiday for pay and leave purposes. (See section 3(a) of Executive order 11582, February 11, 1971.)
*** December 25, 2010 (the legal public holiday for Christmas Day), falls on a Saturday. For most Federal employees, Friday, December 24, will be treated as a holiday for pay and leave purposes. (See 5 U.S.C. 6103(b).)
Source: U.S. Office of Personnel Management:

A free, printable calendar with marked US Federal Holidays can be found here : Online 2010 Calendar with Holidays

If you wish to view how the World celebrates New Year 2010, see New Year 2010 webcam list – this list lists webcams placed or facing popular places where people celebrate New Year Eve e.g. Times Square (NYC), Trafalgar Square (London), Harbour Bridge (Sydney), Main Square (Cracow), Eiffel Tower (Paris) etc.

Calendar 2010 with holidays to print

December 28th, 2009

Year 2010 is comming, 3 days left. It is time to look, how the next year will look like. To see this, we launched two javascript driven calendars for 2010 year. Both of them are, of course as all our tools, free.

First of them, is simple online 2010 calendar with the US Federal Holidays marked on it. Below the calendar you can find a list of the holidays, some law regulations and other information.

The second one is more sophisticated java script that allows you to configure size e.g. pocket, medium, letter and calendar font and then print the calendar with or without the background. If you want to print the 2010 calendar, try this: 2010 printable calendar

Enjoy the calendars and … HAPPY NEW YEAR 2010!!!

Thanksgiving Turkey Weight

November 25th, 2009

Below table shows thanksgiving turkey weight in pounds, kilograms, thawing and roasting time.
Hope this will be useful for forthcoming thanksgiving.

Pounds Kilos Serves Thawing
Cold Water
8-12 3.6-5.4 Up to 4 1-2 days 4-6 hours 2.5-3.5 hours 3-4 hours
12-16 5.4-7.3 5-7 2-3 days 6-8-hours 3-4.5 hours 3.5-5 hours
16-20 7.3-9.1 8-10 3-4 days 8-10 hours 4-5 hours 4.5-5.5 hours
20-24 9.1-10.9 10-15 4-5 days 10-12 hours 4.5-6 hours 5-6.5 hours

Source, except pounds to kilograms conversion, : Sandy Moyer Cooking Site
(you can get many more useful information about roasting thanksgiving turkey on this page, including roasting,thawing,serving,recipes etc.)

Weight Conversion: 1 lb is equal to 0.4536 kg (45.36 dag)
Serving: you should figure 1, to as much as 2 pounds per person (0.45 to 0.9 kg per person)
Thawing: allow about half an hour per pound in cold water, change the water every 30 minutes
Roasting: roasting times are given for oven preheated to 325 fahrenheits (about 160 centigrade)


Samantha Stosur serve speed

November 6th, 2009

During the WTA Tour on Bali Samatha Stosur unofficialy broke Venus Williams serve speed record. Her fastest serve was 208kph (129.2452mph), so it looks like she set new women’s record. Current official record held by V.Williams is 207.6kph (128.9967mph). The WTA said Stosur struck was pending verification.

See Samatha Stosur’s serve speed conversion : 208kph conversion

PS. Despite her service struck Samatha Stosur lost her match with Maria Jose Martinez Sanchez 6:7, 5:7.

The largest lake in central america

August 24th, 2009

The largest lake in central america is Lake Nicaragua called also Lago Cocibolca, Lago de Nicaragua, Mar Dulce, Gran Lago, Lago de Granada, Gran Lago Dulce, Cocibolca,  Granada. The area of lake Nicaragua is  8,264 km2 / 3,191 sqare miles (click on the link to get area converter). Lake Nicaragua is located in southwestern Nicaragua. It drains via the San Juan River into the Caribbean Sea. LN is almost same size as Lake Titicaca which is located on border of Peru and Bolivia (the largest lake in South America). Titicaca surface area is 8,372 km2 / 3,232 square miles. Titicaca Lake is also highest set lake in the world. It sits 3,812 m (12,500 ft) above sea level

World’s tallest men

August 24th, 2009

The tallest man ever (recorded and verified) was Robert Pershing Wadlow (22 Feb 1918 – 15 Jul 1940). He reached 8 feet 11.1 inches 2 m 72 cm in height. His weight was 490 pounds (220 kg).

His great size and his continued growth in adulthood was due to hypertrophy of his pituitary gland which results in an abnormally high level of human growth hormone. He showed no indication of an end to his growth even at the time of his death. Source:

The tallest living man is mongolian Bao Xishun (Xi Shun, The Mast). Bao was born in 1951 in inner Mongolia (China). He measures 7 feet 8.91 inches (2 m 36 cm) tall.

Tallest people list:
John Rogan – Second tallest male in recorded history at 8’9 ½” (268 cm). Tallest African American. (b.1868, d.1905)
Don Koehler – 8′ 2″ (2.49 m), Tallest in World for most of 1970s. Had 5’10” twin sister. (September 1, 1925 – February 26, 1981)
Zhao Liang – 8′ 1.1″ (2.48 m)
Väinö Myllyrinne – Tallest Finn, standing 8’1″ (247 cm). Myllyrinne was born in 1909 and died April 13, 1963.
Gabriel Estêvão Monjane – Guinness World Records listed him as tallest man from 1988 to 1990 at 8’1″ (246 cm). (b.1944, d.1990)

Talles female list:
Trijntje Keever – Tallest recorded woman at 8’4″ (254 cm). Died in 1633 at age 17.
Zeng Jinlian – Tallest woman at 8’2.75″ (249 cm). Suffered from spine curvature and could not stand at full height. Died in 1982 at age 17.
Jane Bunford – Former world’s tallest woman (until Zeng Jinlian) and possibly the world’s tallest person at the time of her death in April 1922 at 7’8″ (234 cm), but due to a curved spine she could not stand up straight. However, if her spine had normal curvature, she would have stood 8’0 (244 cm).
Yao Defen – Claimant as tallest living female at 7’9″ (234 cm). Not confirmed by Guinness World Records.
Sandy Allen – Listed as tallest living female by Guinness World Records at 7’7¼” (232 cm), until her death on August 13, 2008.

See also:
Length converter

World Records Berlin 2009

August 23rd, 2009

Table below lists all new world records set at 12th IAAF World Championships in Athletics Berlin 2009.

Event Result Who
100 m men 9.58s Usain Bolt (Jamaica)
200 m men 19.19s Usain Bolt (Jamaica)
Hammer Throw Women 77.96m Anita Wlodarczyk (Poland)

Unit Conversions:
100 m in yards = 109.3613
200 m in yards = 218.7227
77.96 m in yards = 85.2581

See also:
Usain Bolt Speed
Length Converter