Length Converter (Metric • Imperial/US • Others)

Edit a value → updates all. Changing a unit → converts only that field.

Metric

Length in millimeters (mm)

Length in centimeters (cm)

Length in meters (m)

Length in kilometers (km)

Length in other metric units

Imperial / US

Length in inches (in)

Length in feet (ft)

Length in yards (yd)

Length in miles (mi)

Length in other imperial units

Others

Length in nautical miles (nmi)

Length in Sun radii (R☉)

Length in light years (ly)

Length in other units

Start by entering a value in any field.

Step-by-step derivation

References

Convert any unit to meters, then to all others: v_B = v_A × factor(A→m) ÷ factor(B→m).
in = 0.0254 m; ft = 0.3048 m; yd = 0.9144 m; mi = 1609.344 m (exact).
nmi = 1852 m (exact); AU = 149,597,870,700 m (IAU 2012); ly ≈ 9.460730472×10^15 m; pc ≈ 3.085677581×10^16 m.
R⊕ ≈ 6,371,000 m; R☉ ≈ 695,700,000 m; US survey foot = 1200/3937 m.

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