Ballpark — September 26, 2026
Answers to that day's 5 daily estimation questions.
About how many calories are in a Big Mac?
~580 calories
Many fast-food burgers land in the 500–700 calorie range.
About how many calories are in one tablespoon of peanut butter?
~95 calories
Peanut butter is calorie-dense: about 90–100 calories per tablespoon.
About how many liters are in one US gallon?
3.8 L
A US gallon is just under 4 liters.
About how many watts is a typical microwave oven?
~1,000 W
Many microwaves are rated around 900–1,200 watts.
About how many watts does a 60-watt-equivalent LED bulb actually use?
~9 W
LEDs produce similar light using far fewer watts than old incandescents.