Trade unit conversions

Millimetres to inches, psi to kPa, AWG to mm², yards to tons, fractions to decimals and slope angles — both ways. Every one works in feet and inches or in metric — flip the switch at the top and the numbers you have typed convert with it.

• All converters the unit-conversion hub in one place
• Units & fractions tape chart in sixteenths and exact unit factors
• mm to inches millimetres ↔ inches, with a tape fraction
• psi to kPa psi ↔ kPa ↔ bar
• AWG to mm² wire gauge ↔ area & diameter
• Cubic yards to tons volume ↔ weight by material density
• Fraction to decimal inch fractions ↔ decimal inches
• Degrees to % slope angle ↔ grade % ↔ ratio

Which one do I need?

Both ways, live, with tape fractions where a tape is involved. For every unit at once, the converters hub does it in one box.

• Millimetres on a drawing, inches on your tape? mm to inches calculator →
• A fraction of an inch as a decimal? Fraction to decimal calculator →
• Yards of gravel to tons? Cubic yards to tons calculator →
• Everything at once? All converters calculator →

The other drawers

• Concreto y mampostería
• Estructura y carpintería
• Terreno y jardinería
• Acabados e interiores
• Medición y trazo
• Electricidad
• Plomería y HVAC
• Taller y equipo
• Todas las herramientas