% % % 1.00 Percentage pixel pixels px 1.00 CSS Pixels (90/inch) point points pt 1.25 PostScript points (72/inch) pica picas pc 15.0 12 points inch inches in 90.0 Inches (90 px/in) millimeter millimeters mm 3.543307087 Millimeters (25.4 mm/in) centimeter centimeters cm 35.43307087 Centimeters (10 mm/cm) meter meters m 3543.307087 Meters (100 cm/m) foot feet ft 1080 Feet (12 in/ft) degree degrees ° 1.00 Degrees radian radians rad 57.296 Radians (57.296 deg/rad) gradian gradians grad 1.111 Gradians (1.111 deg/grad) turn turns turn 360 Turns (360 deg/turn) font-height font-heights em 1.00 Font height x-height x-heights ex 0.50 Height of letter 'x' half-em half-ems en 0.50 Half of font height