Un calzador es un utensilio que le permite a quien lo use ponerse los zapatos más fácilmente. Aparecieron por primera vez en el siglo XV, pero su origen real es desconocido. Hay una creencia de que los ajustados zapatos que se utilizaban en la época victoriana llevaron al desarrollo de los calzadores, ya que de otra manera habría sido imposible usar ese tipo de zapatos. Originalmente, los calzadores estaban hechos de madera y aunque algunos siguen siendo de dicho material, la mayoría se fabrican con plástico. También fueron o son hechos de metal, vidrio e incluso papel. Los más caros eran de marfil, plata, y otros materiales preciosos.

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A shoehorn or shoe horn (sometimes called a shoespooner or shoe tongue) is a tool that lets the user put on a shoe more easily. It does so by keeping the shoe open and by providing a smooth surface for the foot and the heel to move, without crushing the shoe's counter (the vertical portion of the shoe that wraps around the back of the foot), in this way acting as a first class lever. Originally, shoehorns were made from animal horn, or hooves, and some made from bulls' hooves are still available for purchase. Today plastic, metal and wood are most often used. They were also made of glass and even paper. Expensive shoehorns were made from ivory, silver, shell, or bone. There are various sizes of shoehorns, though the basic shape varies little except for the length of the handle. Long handled shoe horns, for example, are necessary for longer boots, and also used to reduce bending and straining by persons lacking joint mobility (e.g., older persons), while shoe horns with sturdy handles are useful for putting on boots or heavy iron shoes.

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