Can't stand to converting U.S. measurements to Metric? ToMetric, as the name implies, is a Windows Phone app that is designed to make it easier to covert U.S. units to its metric equivalents.
The interface is simple in that you type or paste the US units and the app will return the metric results. If a measurement could be either liquid or solid (as in ounces) the app will return both conversions. Should you stump the app and enter a U.S. measurement unit not recognized, it will help you look things up on the internet.
The only thing missing is relief for the other half of the equation, converting metrics to U.S. units.
ToMetric is a free application and can be found here (opens Zune) at the Marketplace.