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Length Unit Converter
Convert any length measurement instantly between 17 units — metric, imperial, typography, and screen. Type a value and the entire conversion table updates in real time.
Why a Dedicated Length Converter?
Most length conversion problems involve just two units — inches to millimeters, or feet to meters — and a simple calculator handles those. But when you are working across metric, imperial, and screen units simultaneously (say, a graphic designer converting between mm, inches, picas, and pixels), a single lookup is not enough. This converter shows every unit at once so you can read any combination in one glance.
It is particularly useful alongside the online ruler (which uses mm) and the graph paper generator (which sets grid spacing in mm), where you might need to convert an imperial measurement first. The pixel ruler measures in pixels, and this converter can translate pixel counts to physical units at a given screen density.
All 17 Units Supported
- Metric: nanometer (nm), micrometer (μm), millimeter (mm), centimeter (cm), decimeter (dm), meter (m), kilometer (km)
- Imperial: inch (in), foot (ft), yard (yd), mile (mi)
- Typography: point (pt = 1/72 inch), pica (pc = 12 points)
- Screen: pixel at 96 ppi (CSS), pixel at 72 ppi (print)
- Specialized: nautical mile (nmi), furlong, chain
Key Conversions at a Glance
- 1 inch = 25.4 mm (exact, international standard)
- 1 foot = 304.8 mm = 30.48 cm
- 1 mile = 1.609344 km
- 1 meter = 100 cm = 1000 mm
- 1 pica = 4.233 mm (12 points)
- 1 point = 0.353 mm (1/72 inch)
- 1 CSS pixel = 0.2646 mm (at 96 dpi reference)