What Size Is a 100 x 70 cm Frame in Inches? | Exact Inch Conversion

A 100 x 70 cm frame measures 39.37 x 27.56 inches, so it does not match any standard US frame size.

Picture the moment the tape measure stops at 100 cm across and 70 cm down: that is 39.37 inches wide by 27.56 inches tall, and no US shelf carries it off the rack. Inches equal centimeters divided by 2.54, the exact international standard, so 100 cm is 39.3701 inches and 70 cm is 27.5591 inches. Those two decimals matter far more than they look, because storing an oversized print behind glass demands a frame built to those numbers, not to whatever a seller calls “close enough.”

100 x 70 cm Frame in Inches: The Numbers That Matter

The conversion itself is simple division, and the honest wall measurement is 39.37 x 27.56 inches — not 39 x 28, and not a whole number at all. Most metric frame makers round the same size the other direction in their charts, listing 70 x 100 cm as 27.56 x 39.37 inches, which is the identical rectangle turned 90 degrees.

Every figure below comes straight from the arithmetic, so you can check any of them with a calculator in seconds.

Why the Nearest US Frame Size Fails

A 24 x 36 inch frame leaves a visible gap and a 30 x 40 inch frame swallows the print entirely, so neither standard size fits a 100 x 70 cm piece. US frame sizes step in whole inches — 24 x 36, 30 x 40, 32 x 48 — while the metric standard lands in the cracks between them at 39.37 x 27.56 inches.

Two details trip people up more than anything else. The first is orientation: 100 x 70 cm and 70 x 100 cm describe the same rectangle, one vertical landscape and one horizontal, so sorting by width or height alone tells you nothing about fit. The second is what a frame size actually names. In many frame guides, the listed measurement refers to the inside or glass opening, not the outer edge, which means a frame sold as 70 x 100 cm can hold a slightly different print once an inner spacer is involved.

If the print is going on a wall in a US home, the practical routes are these: order a custom-molded frame cut to 39.37 x 27.56 inches, buy a metric frame that arrives as 70 x 100 cm, or use matting to bridge the gap into a larger US size. That third option is the one most people miss — a custom mat can make a 30 x 40 inch frame read as a deliberate wide border around a 39.37-inch-wide print, and matting is cheaper than new molding in most shops. If you are comparing ready-made options before you commit, this roundup of 100 x 70 cm frames worth buying lays out the trade-offs in one place.

Checking Your Measurement Before You Order

Measure the artwork or print itself, not the old frame, because frame sizes are usually based on the inside opening rather than the outer edge. That single habit prevents the most common return.

Run the numbers in this order:

1. Measure the print’s width and height in centimeters.
2. Divide each number by 2.54 to get inches to two decimal places.
3. Compare those inches against standard US frame sizes.
4. If nothing matches within about a quarter inch, plan for custom framing or a mat.

RapidTables and The Calculator Site both publish the same conversion rule, and a quick check of either confirms the exact figures — RapidTables’ cm to inch converter will reproduce 39.3701 and 27.5591 for you in one step. Keep a quarter-inch tolerance in mind whenever you compare a metric print to an inch frame; below that, the gap is invisible behind a mat, and above it, the print will shift or buckle.

The size you are actually shopping for is 39.37 x 27.56 inches, or the metric 100 x 70 cm if the seller works in centimeters. Anything else gets you a frame that almost fits — and “almost” is the one measurement that never hangs straight.