See also:
 | - Convert-me.Com - [ Kids/Teens/Mature Teens ] - Interactive calculators for many common and exotic measurement systems, including metric, Ancient Greek, Roman, and old Russian.
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 | - Convertworld - [ Teens/Mature Teens ] - Interactive multi-lingual conversion calculator for a wide variety of units.
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 | - A Dictionary of Units - [ Teens/Mature Teens ] - A summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a standard unit.
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 | - Funbrain.com - [ Kids/Teens ] - Measurement game - Game which has several levels of difficulty for both English and metric rulers.
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 | - GCSE Maths: Measurement - [ Kids/Teens ] - Includes length, area and volume and the use of prefixes in units. With worked examples and animations.
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 | - How Many? - [ Teens/Mature Teens ] - A dictionary of units of measurement: explanations of the metric system, System Internationale (SI), English customary system, and other modern measuring systems. Plus extensive links to other measurement-related Internet resources.
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 | - Jack's Math - [ Teens/Mature Teens ] - Provides several methods for determining length, width and height.
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 | - Learning About Time - [ Kids ] - History and description of clocks with lessons on telling the time. Includes an interactive tutor. [Requires Java.
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 | - Metric 4 US - [ Teens/Mature Teens ] - A site promoting the metric system which argues why metric is better and English is worse. Provides an English-metric online calculator.
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 | - Metric Conversion - [ Teens ] - Java metric conversion calculator for length, weight, pressure, and volume.
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 | - Metric Conversion Chart - [ Teens/Mature Teens ] - Online metric conversion calculator includes metric, US customary and Imperial unit conversions.
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 | - Metric Conversion Tables - [ Teens/Mature Teens ] - Conversion factors and online calculators for metric and imperial units.
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 | - Metric Measures - [ Kids/Teens ] - Offers equivalents for common measurements, plus how metric units are used in sports and the kitchen.
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 | - The Modern Metric System - [ Teens/Mature Teens ] - Dictionary of metric units explaining the principles and history of the system.
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 | - Online Units Conversion - [ Teens/Mature Teens ] - Gives equal values for areas, volumes, circle measurements, computer storage, currencies, distance and length, energy, fuel consumption, power, pressure, speed, temperature, time, torque, and weights.
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 | - Percent Change Calculator - [ Kids/Teens/Mature Teens ] - Measures the difference in values using percentages. Includes bar graphs with the answer.
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 | - The Ruler Game - [ Kids/Teens ] - Timed game will test how quick you can read a ruler.
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 | - Unit Conversions - [ Teens/Mature Teens ] - Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions.
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