convert units of measurement

Speed of Light

Attention
Your speed:
Attention
Is equal to:
Attention
Decimal
Scientific
 

Light Speed Multiple

Enter the light speed multiple that you want to convert. For example, enter 1.0 for the speed of light, enter 0.1 for one tenth the speed of light, and enter 2.0 for twice the speed of light. Your input should be in one of these formats: Integer: 2 Decimal: 2.71 Scientific Notation: 0.352e02 Formula: (2.7*5e2)/( 1 + (6.5/1.8e-2) ) Fraction: 9 + ( 17 / 32 ) Calculator Memory: You can use the results from previous conversions or calculations, which you may have saved in the Calculator Memory. First set focus on the light speed input field, then click the Recall button on one of the Memories. The memory contents is loaded to the input field. See the Calculator Memory for more details. Maximum Input Length:   200 characters
 

From and To Menus

From Menu In this menu, choose the medium through which your light is passing, for example one of these. speed of light (glass) speed of light (vacuum) speed of light (water) To Menu In this menu, choose the speed units you want to convert to, or choose a different medium if you want the ratio of light speed for two different mediums. For example, choose one of these. meters per second miles per hour kilometers per hour speed of light (water) speed of light (vacuum) speed of light (glass) tip   TIP: Drag your mouse pointer in the To or From menu to change units.   Release the mouse button to perform a new conversion. tip   TIP: Select units in the To or From menu.   Press the Up and Down arrow keys on the keyboard to change units and do a new conversion.
 

Light Speed Multiple You Entered

The light speed multiple you entered in the input field, is shown here again as a number with the From medium added. If you entered a formula or a fraction in the light speed input field, your formula or fraction was calculated and reduced to this number. The medium shown here is the medium selected in the From menu. tip   TIP: You can Copy and Paste any of the fields by selecting the text in the field, then pressing: PC: Control-C copy, Control-V paste. Mac: Command-C copy, Command-V paste. tip   TIP: Error messages, if any, are displayed here.
 

Your Light Speed Multiple Converted

This is the light speed value resulting from conversion, with the speed units that are selected in the To menu. Calculator Memory You can save the result of your conversion in the Calculator Memory, then use your saved results later as input for other converters and calculators anywhere on the website. See the Calculator Memory for more details. tip   TIP: Precision of the converter is 12 significant digits, from left to right.   Digits after the 12 left-most digits, are not significant. Numeric Range of the converter is: +1.797e+308 to -1.797e+308 +1.000e-311 to -1.000e-311 tip   TIP: Error messages, if any, are displayed here.
 

Control Buttons

The light speed converter has three control buttons. Decimal and Scientific buttons let you choose the output format, as one of these two: Decimal: -9999.1 Scientific Notation: -9.9991e3 Decimal Button – In this mode the converter will output in Decimal format whenever possible.

However, the converter will automatically output in Scientific Notation when the results cannot be shown properly in Decimal format. Scientific Button – In this mode the converter will always output in Scientific Notation. Convert Button – Convert the light speed multiple that you entered above, by using any of these methods:
  • Click the Convert button
  • Select a different unit in the From menu
  • Select a different unit in the To menu
  • Click the Decimal or the Scientific button
  • Press Enter or Return on keyboard
tip   TIP: Scientific Notation is better for visualizing and working with big and small numbers, compared to decimal format.
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