Length and Distance Conversion

Always display scientific notation.
Only display reasonable values.

When Captain Nemo went 20,000 leagues under the sea, how far did he travel?

The circumference of the earth.

The average height of human adults.


Enter a value and a unit and the value will be converted to other units.

Significant figures are used. Results have the proper number of significant figures for the conversion factor and the number that was entered. Most conversion factors used by this calculator have ten significant figures. Scientific notation may be used for large results or if the number of significant digits would be ambiguous otherwise. This calculator follows proper rounding rules for scientific purposes.


This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

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Copyright Stephen Ostermiller 2002-2014