Science and Technology

Measurement, Calculation and Conversion

Convert Plus
Converts area, capacity and volume, circular measure, computer storage, currency, distance and length, energy and work, fuel consumption, power, pressure, speed, temperature, time, torque, mass and weight
http://www.convertplus.com/ en/

Footrule.com
A large collection of converters, units and measures and data tables.
http://www.footrule.com

International Bureau of Weights and Measures
The task of the BIPM is to ensure world-wide uniformity of measurements and their traceability to the International System of Units (SI). The site includes a definition and description of the SI base units (the metre, the kilogram, the second, the ampere, the kelvin, the mole, and the candela)
http://www.bipm.org/ en/ home/

Introduction to Weights and Measures
An introduction to historical and archaic weights and measures from the University of Nottingham, which aims to identify and explain some of the most common difficulties and pitfalls and to provide sources of assistance for researchers.
http://www.nottingham.ac.uk/ manuscriptsandspecialcollections/ researchguidance/ weightsandmeasures/ introduction.aspx

Measurement
A dictionary of all types of measurement
http://www.unc.edu/ ~rowlett/ units/ index.html

Online Conversion
Convert almost any measurement to another.
http://www.onlineconversion.com/

Streetmap.co.uk Grid Conversion
Enter postcode, Ordnance Survey grid reference, Landranger grid or latitude and longitude and convert your reference to the other coordinates
http://www.streetmap.co.uk/ streetmap.dll?GridConvert

Time Zone Converter
Find out the time anywhere in the world.
http://www.timezoneconverter.com/

Timeanddate.com
Time zones and time converter, sun and moon calculators, calendars for any year, date calculators
http://www.timeanddate.com/ worldclock/

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