Depth Sounder Converter

Summary

Enter a depth reading in fathoms, feet, or meters and instantly see the equivalent in all three units.

How it works

1. Enter a depth value in any of the three fields — fathoms, feet, or meters.
2. The converter applies the exact relationships: 1 fathom = 6 ft = 1.8288 m.
3. The other two fields update instantly as you type.
4. Click "Swap" to copy a result back into the input field.
5. Use the quick reference table below to see common charted depths converted across all three units.

Use cases

• Cross-reference a fish finder reading (feet) against a chart marked in fathoms.
• Convert depths from a US chart (fathoms) for passage planning in Europe (meters).
• Translate depth gauge readings when switching between vessels with different display units.
• Verify anchor scope calculations when your chart and sounder use different units.
• Teach new crew members the relationship between fathoms, feet, and meters.
• Quickly check that a shallow-water warning depth threshold matches across unit systems.

Frequently Asked Questions