KM to Feet Converter (All Length Units)

Kilometers to Feet – Exact Factor 3280.8399…

Core idea: 1 kilometer = 1000 meters and 1 foot = 0.3048 meters (exact). So 1 km ÷ 0.3048 m/ft = 3280.839895 ft. Most tables round to 3280.84.

Formulas

• ft = km × 1000 ÷ 0.3048
• Simplified: ft = km × 3280.839895 (keep full precision internally)
• Inverse: km = ft × 0.0003048
• Scientific: 1 km = 3.280839895 × 103 ft

Quick Values

Worked Example

Convert 3.75 km to ft: 3.75 × 3280.839895 = 12303.1496 ft. Rounded to 2 decimals → 12,303.15 ft. Check back: 12303.1496 × 0.0003048 ≈ 3.75 km.

Where Used

• Distances (metric) compared to elevation or building height notes (feet).
• Aviation summaries (altitude in feet, route distance in km).
• Outdoor trail mapping and mixed standard reports.

Accuracy & Tips

• Keep full factor 3280.839895 for multi‑step calculations to reduce rounding drift.
• For casual use 3280.84 is fine; for surveying keep at least 6 decimals.
• Always document if you rounded the factor.

More Examples

FAQ

• Why the long factor? It comes from 1000 ÷ 0.3048 with 0.3048 exact (defined by SI).
• Best quick mental rule? Multiply km by ~3300 then subtract about 0.6%.
• How many km in 1 foot? 0.0003048 km (exact).

Use exact factor internally; round only for display.