We get this question alot and there is no simple answer unless you carry your area calculator.
We have looked for scripts that would make it easy for you to reference this page to do your area conversions but we cannot find any scripts that would do this.
The most common is scripts are created for "Old World" measurements to Metric rather than the reverse. Therefore, please use this conversion script with estimation until you come near your square meter total.
Do not use your "Enter" key but use your mouse pointer to activate the conversion.