VoyageDistance

Free Sea Distance & Transit Time Calculator: Port to Port & Multi-Leg Voyages

Calculate shipping distance and marine transit time between ports along real shipping routes — a free sea distance and transit time calculator for port-to-port and multi-leg voyages. Add as many stops as you need, no login or account required. It also works as a cargo ship distance calculator: pick a vessel type to estimate CO₂ emissions for bulk carriers, container ships, tankers, and more on the same route.

Routes are generated for visualization and voyage appraisal, not for actual ship navigation.

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Canals / straits the route may use

About the Shanghai → Houston route

Sea route map from Shanghai to Houston — 10206 nautical miles

The sea route from Shanghai to Houston covers approximately 10206 nautical miles (18902 km). At a typical vessel speed of 14 knots, that's roughly 30 days at sea, not including port time, weather routing, or canal transit delays.

This route normally transits the Panama Canal. Routing around it instead adds about 3767 nautical miles and 11 extra days at 14 knots.

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Frequently asked questions

How is the Shanghai to Houston transit time estimated?

VoyageDistance calculates the Shanghai–Houston route along real shipping lanes and chokepoints, then divides the total distance by an assumed vessel speed (14 knots by default) to estimate transit time. Adjust the speed above to match your own vessel.

Can the Shanghai to Houston route avoid the Panama Canal?

Yes — untick the Panama Canal checkbox above to see the alternative routing. Avoiding it adds about 3767 nautical miles and 11 days to this voyage at 14 knots.