Worldscale
Worldscale is the standard system used to quote and negotiate tanker (oil and product) freight rates. Rather than a fresh dollar figure for every voyage, the industry uses a published schedule of nominal reference rates (“Worldscale flat”, or WS100) for thousands of specific voyage routes, calculated annually by the Worldscale Association based on standard vessel, cost and bunker assumptions.
Actual deals are then quoted as a percentage of that flat rate — for example WS150 means 150% of the published nominal rate for that route, and WS75 means 75%. This lets the market express and compare rates across many routes simply, with a single number reflecting how strong or weak the market is relative to the baseline. Worldscale is to tankers what the Baltic indices are to bulk — the common language of tanker chartering and rate negotiation. Understanding Worldscale points is essential to reading and pricing tanker freight.
Tanker deals are struck across thousands of routes, and Worldscale is the shared shorthand that makes them comparable — everything expressed as a percentage of a published baseline. A single WS number instantly conveys how hot or cold the market is. Understanding it is essential to reading, negotiating and pricing any tanker fixture.
What does WS150 mean?
A freight rate of 150% of the published Worldscale nominal (flat) rate for that specific voyage route.
Why does the tanker market use Worldscale?
It provides a common baseline across thousands of routes, so rates can be quoted and compared simply as a percentage.