Free tool

Bathroom mirror size calculator

Enter your vanity. You get how wide the mirror should be, how high to hang it, and whether two mirrors beat one.

25 to 32 inches wide

70 to 90 percent of the vanity's width, so the vanity frames it.

  • Bottom edge41 to 46 inches from the floor, 5 to 10 above the counter
  • Center it18 inches from the vanity's left edge, or on the sink

See it over your own vanity

Numbers say it fits. A picture says whether round, arched or a plain rectangle suits the room. Photograph the bathroom, add the mirror from any store, and see it on your wall.

Try it free How the bathroom visualizer works

The rules behind the numbers

  • Width: 70 to 90 percent of the vanity's width, and never wider than the vanity [1][2].
  • Two sinks: a vanity 60 inches or wider with two sinks is better served by two mirrors, one centered over each sink [1]. Size each to its half of the vanity, a little narrower than its sink zone [2].
  • Height: the bottom edge 5 to 10 inches above the counter, high enough to clear the faucet and backsplash [1][2]. For someone who sits at the vanity, hang it lower, with the bottom edge near the counter [1].

Choosing the vanity too? Common widths are 24, 30, 36, 48, 60 and 72 inches. See the vanity sizes on the bathroom visualizer page.

Sources

  1. What size lighted mirror do you need? Sizing and mounting height, solved, Golden Lighting. Read November 3, 2026.
  2. What size vanity mirror, Infinite Bath. Read November 3, 2026.

Questions

What size mirror for a 36 inch vanity?

About 25 to 32 inches wide: 70 to 90 percent of the vanity, so the vanity frames the mirror.

What size mirror for a 30 inch vanity?

About 21 to 27 inches wide. A 24 inch mirror is a common pick.

What size mirror for a 48 inch vanity?

About 34 to 43 inches wide for a single sink. With two sinks, two mirrors of about 17 to 22 inches each, one over each sink.

Should a 60 or 72 inch double vanity get one mirror or two?

Two, one centered over each sink. One long mirror centered between the sinks leaves both people looking at its edge.

How high should a mirror hang above a vanity?

With the bottom edge 5 to 10 inches above the counter, high enough to clear the faucet and backsplash. On a 36 inch counter, that's 41 to 46 inches from the floor.

Should the mirror be wider than the vanity?

No. Keep it narrower than the vanity, so the vanity frames it.

Will it look right in my bathroom?

The numbers say it fits. To see a mirror from any store over your own vanity, take a photo of the bathroom and add it: Renderior shows it in place, with a link to buy it.

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See the mirror over your vanity before you buy it.

Try it free 2 free pictures every day. No card needed.