When you get to choose what activity level you have, what does each one mean? There's sedentary, lightly active, moderately active etc.
What would I be if I take a brisk walk or jog on rebounder about 30 -40 mins usually 4 times a week? TIA!

Can you chose one that lets you change your mind later?
You can pick sedentary and add everything you do all day. Then after a few days find an average and reset it. I've done that in fitday.com. Now I only add extraordinary activities each day.

I'm more referring to the regular calculators; not the ones that you have to log into or anything like that. They're more of a general sort of thing where you choose from a drop down menu of different activity levels.

I'm a bit cautious of most of them. I "LIKE" to think I'm moderately active but through trial and error, I've found differently. And you'd be surprized at the number of people who are happy to accept that they're using over 3000 cals per day.

But enough about me and my blah blah blah. How tall are you, how much do you weigh and what are some of the results you've gotten?
I'll go find one that's pretty accurate for me and we'll compare notes. OK?

How about hussmanfitness.org

In the lower right hand corner there's a click thru about BMR
It asked for my body fat percentage but I skipped it and it worked just fine.

Remember that these calculators are generalizations and may not accurately reflect your calorie burn rate. However, they are useful tools. It gives you an idea of how many calories you need to cut to lose weight. From your description of activity, I would say you're moderately active. I had an actual resting metabolic rate test at a doctor's office. Turns out I burned about the same calories as one of the generalized tests showed. Gives me something to work on in planning my diet.