Site:  http://www.hussman.org/fitness/caliper.htm

Summary:

This calculator computes your estimated bodyfat % from your suprailiac skinfold (in millimeters). I'm assuming you've read my Q&A page on how to use the calipers accurately. Remember that even the best technician can have errors in the 1.5% range either way, and that the best way to measure progress is by tracking the readings peak-to-peak or trough-to-trough over time.

You really don't want to know what I think is "fun". Just for fun, I statistically reduced the standard Durnin & Womersly data into the best functional forms I could estimate. I got a 99% fit for both the men's and women's data, so my formulas will be pretty accurate within a fraction of 1%.

For readings from the suprailiac only, the best functional form turns out to be quadratic. Using M as your suprailiac reading in millimeters, my estimated formulas (extremely accurate for readings below 35 mm) are:

Women: Fat % = 1.223 M - 0.0134 Msquared + 0.124 Age + 6.07
Men: Fat % = 1.378 M - 0.0174 Msquared + 0.213 Age - 5.84

Above 35 mm, calculate the result for 35 mm and then add 0.25% for every 1mm above 35.

If you want to measure from more places, you can use the following calculations. They're not programmed in at the moment.

Typical sites are the back of the upper arm (over the tricep, taking the fold vertically as if you were pinching the tricep), the front of the upper arm (over the bicep, vertically ), the subscapular (the back slightly below the shoulder blade, taking the fold at a 45 degree angle, along the line from the opposite shoulder to the nearest elbow), and the suprailiac (the side of the waist, just above the point of the hipbone) In order to do the sites other than the suprailiac, you have to have someone else taking the measurements. You then take the sum of the measurements at all four locations, There are entire tables for the multiple measurements, which have hundreds of entries.

ln( ) refers to the natural logarithm, which is one of the functions on any good calculator. "Sum" is the sum of the 4 readings: tricep, bicep, back and waist (which will range anywhere from 18 to 200 mm). Here is the simplest functional form that gives accurate results.

Women: Fat % = 11.91 x ln(Sum) + 0.0442 x ln(Sum) x Age - 23.54
Men: Fat % = 10.32 x ln(Sum) + 0.0657 x ln(Sum) x Age - 27.03

I hate logarithms too. Look, I just run the numbers.

Book: Eat This Not That by David Zinczenko

I love this book. It colorfully and lovingly explores a single topic: how to make smarter calorie choices for the foods we all eat at the places we actually eat them. When browsing a menu we typically see chicken and think, that's a safe choice. Not so. The book, using full color pictures of each meal, shows at McDonald's you could select the Premium Grilled Chicken Club at 570 calories or you could eat the Quarter Pounder at 410 calories! That's a 160 calorie difference or a difference of 16 pounds a year. Eat the burger over the chicken and you save while still eating something tasty. Not what I would have expected.  Let's look at a few more.

Site: http://www.healthassist.net/food/300kcal/300.shtml

How do you develop a sense for how many calories you are eating? By seeing pictures of food portions and how many calories are in those portions. Eventually you just kind of absorb the numbers and though you may need completely accurate, just having a feel for how much you are eating is good enough. That's why a love sites like this 300 Calorie Food Picture Gallery. You'll see a picture of apples and see that two apples are about 300 calories. This site even estimates the cost for a 300 calorie portion. There are even instruction on how to create your own picture gallery. Very cool!

Site: http://www.nhs.uk/pages/gallery.html

Summary:

A cool site that shows pictures of what 120 calories of different foods look like. What shouldn't be surprising is how little a portion size of your favorite fattening foods you get for 120 calories.

Let's do a little calorie investment counseling. For 120 calories you can have all those gorgeous apples or that miserable little bit of candy bar. Most of the time I'll invest my calories in the apple. But I'll definitely splurge on the candy bar from time to time. The point is more to know how many calories you are eating and what you are getting for those calories. What this site does is make that relationship clear.