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How to Measure Bed Size in Inches

Published in Bed Size Measurement 4 mins read

Measuring bed size in inches involves accurately determining the dimensions needed for a mattress or frame. The key is knowing where to measure.

To measure bed size in inches, you should always measure the inside dimensions of the bed frame where the mattress will sit. According to the provided reference, "Always remember to take the measurement from the inside because the mattress needs to fit into the frame. And not pop. Outside."

Why Measure the Inside?

Measuring the inside of the frame is crucial. It ensures that the mattress will fit snugly within the designated area without being too large (which would prevent it from lying flat) or too small (leaving gaps).

Step-by-Step Guide to Measuring

Here’s how to measure your bed frame accurately in inches:

  1. Prepare Your Tools: You will need a reliable measuring tape or ruler. A metal measuring tape is often easier for longer measurements.
  2. Measure the Width: Place the end of your measuring tape against the inside edge of one side rail and extend it across to the inside edge of the opposite side rail. Ensure the tape is straight and level. This gives you the width in inches.
  3. Measure the Length: Place the end of your measuring tape against the inside edge of the headboard or the end of the frame where the mattress rests at the top. Extend it down to the inside edge of the footboard or the other end of the frame. Keep the tape straight. This gives you the length in inches.
  4. Measure the Depth (Optional but Recommended): For certain frames, like platform beds or those with specific mattress requirements, you might also measure the depth or height from the mattress support (slats, solid base, etc.) to the top edge of the frame side rails. This helps determine how much of the mattress will be visible.

Always double-check your measurements to ensure accuracy.

Standard Bed Sizes in Inches

While measuring your specific frame is the best approach, understanding standard mattress sizes can also be helpful. These are the dimensions mattresses are manufactured to fit within standard frames.

Here are common standard bed sizes in inches:

Bed Size Width (in) Length (in)
Twin 38 75
Twin XL 38 80
Full (Double) 54 75
Queen 60 80
King (Standard) 76 80
California King 72 84

Note: Mattress thickness varies greatly and does not affect the bed frame's width and length measurement.

Practical Tips for Measuring

  • Measure Multiple Spots: Measure the width and length in a couple of different places within the frame to account for any slight variations or irregularities.
  • Measure Empty: Ensure the frame is empty of any mattress or bedding when measuring.
  • Record Clearly: Write down the width and length measurements immediately to avoid confusion. Always label them (e.g., "Frame Width: 60 inches", "Frame Length: 80 inches").
  • Consider Mattress Tolerance: While standard sizes are listed, mattresses can have slight variations (usually within an inch). Your frame measurements should ideally match the standard mattress size or be just slightly larger (e.g., 60.5 inches wide by 80.5 inches long for a Queen frame).

By following these steps and measuring the inside of your bed frame, you can accurately determine the size needed for a mattress or compare it against standard sizes.

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