If a stay-at-home mom could be financially compensated, she'd bring home nearly $117,000 a year.

That's according to an annual pre-Mother's Day study released by Salary.com, which studies workplace compensation.

For the past eight years, Salary.com has calculated mothers' market value by studying pay for tasks such as child care and housekeeping.

This year's stay-at-home mom figure is $116,805 per year, while the working mom figure is $68,405. Both are down from last year because of a change in study methodology.

The range of at-home value for a working mother varies from $36,680 to $104,767, according to the site.

The numbers were based on a survey of moms who averaged a 94-hour workweek. If moms were in the workplace, they'd be spending more than half their working hours on overtime.

Salary.com also provides a tool that allows you to calculate the value of the mother in your life and even cut a pretend check for that amount.