Niagara Falls Flow: About 2,400 Tons of Water Per Second

The Niagara River pours an average of 2,400 cubic meters per second (85,000 ft³/s) over the falls. Since 1 m³ of water ≈ 1 metric ton, that equals roughly 2,400 metric tons per second.

Flow varies seasonally and with hydroelectric diversions, but the sheer volume makes Niagara one of the world’s most powerful waterfalls.