Deepest Fjords Depth Comparison (Meters Max Sounding)
Compare the 10 deepest fjords by max sounding depth, from Sognefjord at 1,308 m to Saguenay at 275. Soundings in meters and feet with exact national surveys.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Sognefjord Deepest fjord in the world. | 1,308 m (4,291.3 ft) | Vestland, Norway, max sounding | Norwegian survey: Sognefjord max depth 1,308 m |
| Hardangerfjord 408 under Sognefjord. | 900 m (2,952.8 ft) | Vestland, Norway, max sounding | Norwegian survey: Hardangerfjord max depth 900 m |
| Trondheimsfjord 283 under Hardangerfjord. | 617 m (2,024.3 ft) | Trondelag, Norway, max sounding | Norwegian survey: Trondheimsfjord max depth 617 m |
| Scoresby Sound Ranks top among Arctic here; see notes. | 600 m (1,968.5 ft) | East Greenland, max sounding | Greenland survey: Scoresby max depth about 600 m |
| Nordfjord Ranks above Lysefjord; see notes. | 565 m (1,853.7 ft) | Vestland, Norway, max sounding | Norwegian survey: Nordfjord max depth 565 m |
| King Oscar Fjord About figure with ice cover. | 500 m (1,640.4 ft) | East Greenland, max sounding | Greenland survey: King Oscar max depth about 500 m |
| Lysefjord Ranks above Saguenay; see notes on order. | 460 m (1,509.2 ft) | Rogaland, Norway, max sounding | Norwegian survey: Lysefjord max depth 460 m |
| Nansen Sound Ice choked survey gaps. | 400 m (1,312.3 ft) | Nunavut, Canada, max sounding | Canadian survey: Nansen Sound max depth about 400 m |
| Milford Sound Tied with Nansen by about figures. | 400 m (1,312.3 ft) | South Island, NZ, kept for scale | New Zealand survey: Milford max depth about 400 m |
| Saguenay Fjord 342 under Trondheimsfjord. | 275 m (902.2 ft) | Quebec, Canada, max sounding | Quebec survey: Saguenay max depth 275 m |
About this converter
Sognefjord drops 1,308 m max sounding, 408 clear of Hardangerfjord at 900. Trondheimsfjord at 617, Scoresby at about 600, Nordfjord at 565, King Oscar at about 500, Lysefjord at 460, Nansen and Milford at about 400 each and Saguenay at 275 follow. Depths here are max soundings, not lengths. Lengths rank on a separate fjord page, so km stay out here. Sills at fjord mouths run shallower than inner basins, which explains single max figures.
How to use it
Pick two fjords and a unit in the top row. The three boxes below stay linked. Change any box and the other two update. Try Sognefjord against Saguenay to see the near five times gap. The bars below scale to Sognefjord so Saguenay looks thin next to it. Switch the unit to feet for US figures. Ratios are exact divisions of the max soundings.
Lysefjord at 460 ranks above Saguenay at 275, Nordfjord at 565 ranks above Lysefjord, and Scoresby at about 600 ranks top among Arctic rows despite draft table quirks. About stays in Arctic rows with ice cover gaps. Lengths rank on longest-fjord-lengths, so this page keeps depths only. Figures follow national surveys.
FAQ
What is the deepest fjord?
Sognefjord at 1,308 m max sounding. Hardangerfjord follows at 900.
Is this the same as fjord lengths?
No. Lengths rank elsewhere. This page keeps max soundings.
Why about figures?
Ice cover gaps. Arctic rows use about with survey notes.
What is a sill?
Shallow mouth ridge. Inner basins drop deeper behind sills.
Sources
- National surveys max soundings: Sognefjord 1,308; Hardangerfjord 900; Trondheimsfjord 617; Nordfjord 565; Lysefjord 460; Saguenay 275 m; Greenland Scoresby about 600, King Oscar about 500; Canada Nansen about 400; New Zealand Milford about 400 m
Last verified: 2026-10-09 · 10 entries
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