Property tax calculator?

[Alison Michel]

Hi BP,
I'm trying to calculate Baltimore City property taxes. According to http://livebaltimore.com/city-living-essentials/property-taxes/,

Current (July 1, 2013 to June 30, 2014) tax rates:

• Baltimore City: $2.248 for every $100 of assessed property value
• Maryland State: $0.112 for every $100 of assessed property value

So, I'm terrible at math but it seems like I should be able to take an assessed property value, divide by 100, then multiply that times 2.36.

But then when I calculate the taxes based on tax assessment, for example, in this listing: http://www.zillow.com/homedetails/322-E-33rd-St-Baltimore-MD-21218/36477903_zpid/, and trying a few years' worth of assessments and taxes, I get a number that is about $50-55 off.

What's up??

Thanks!

Alison