The crack spread is the difference between crude oil prices and the prices of refined products like gasoline and diesel. It represents the profit margin for oil refiners — and it’s one of the most important signals in energy markets.
What is a Crack Spread?
The term “crack” refers to the refining process of “cracking” crude oil molecules into lighter products. The crack spread measures the gross refining margin: what a refiner earns by buying crude oil and selling refined products.
How Crack Spreads Are Calculated
Simple Crack Spread (1:1)
Gasoline price minus crude oil price. The simplest measure of refining margin for a single product.
3-2-1 Crack Spread (Most Common)
The industry standard: 3 barrels of crude oil produce 2 barrels of gasoline and 1 barrel of diesel/heating oil.
Formula: (2 x Gasoline price + 1 x Heating Oil price – 3 x Crude Oil price) / 3
Regional Crack Spreads
- US Gulf Coast (USGC): WTI-based, the benchmark for US refining
- Northwest Europe: Brent-based, reflects European refining margins
- Singapore: Dubai crude-based, the Asian benchmark
Why Crack Spreads Matter
- Refiner profitability: High crack spreads = refiners make money = they buy more crude = bullish for oil
- Supply signal: Collapsing crack spreads often precede crude oil selloffs, as refiners cut throughput
- Seasonal patterns: Crack spreads typically peak in summer (driving season demand) and winter (heating oil demand)
- Geopolitical indicator: Refinery outages (hurricanes, sanctions) cause crack spreads to spike
Historical Context
The 3-2-1 crack spread averaged around $10-15/barrel from 2015-2021. In 2022, it spiked to over $60/barrel as Russian refined product sanctions created a global shortage. By 2025, it normalized to $20-30/barrel.
Track Crack Spreads
View live regional crack spreads on our Oil Prices & Market Dashboard.