# Risk glossary

To calculate the spread, the cents-per-gallon product prices are multiplied by 42 (the number of gallons per barrel) and subtracted from the crude oil price. For example, when heating oil futures cost $0.60 per gallon and Nymex division light, sweet crude oil is priced at$22 a barrel, the heating oil crack spread in dollars per barrel = $0.60 x 42 =$25.20 – $22 =$3.20.