[clsec]

A yearly food cost of $4,686 for a single adult w/o children in San Francisco County? Not quite, more like $6,000-7,200 per year or $500-$600/mo.

[EatingWithForks]

I could imagine that as a yearly food cost (a little under ~100/week). I lived off less than that when I was a grad student. It involved very little eating out (which this calculator accounts for) and consuming mostly stews or curries.

[xboxnolifes]

The food portion is likely quite off for very high cost of living areas. It uses the national average and applies an adjustment factor based on 4 regions: East (1.08), Midwest (0.95), South (0.93), and West (1.11). So, every area within said region has the exact same food costs.

Either that, or food costs really are similar within a region if you cook your own food and shop frugally.