How do I convert inches to centimeters for a cut list?

Multiply inches by 2.54 (exact). For example, a 14.5 in cut is 14.5 × 2.54 = 36.83 cm. Use the Length Converter when you need many pairs or reverse conversion.

Is 5.7 feet the same as 5 feet 7 inches?

No. 5.7 ft means 5 ft plus 0.7 × 12 = 8.4 in. Five feet seven inches is 5 + 7/12 ≈ 5.583 ft. Always separate feet and inches before converting to metric.

How many feet are in a meter on a job site?

One meter is about 3.28084 feet. A 2.4 m sheet is roughly 7.87 ft. For framing and openings, convert once at full precision, then mark the tape.

Can I reuse a length factor when converting floor area?

No. Area uses squared length factors. Inches↔cm uses 2.54; square inches↔cm² uses about 6.4516. Use the area conversion guide for lot and floor sizes.

Where can I get construction-focused measurement tips?

Read construction measurement tips for trade and DIY habits, then return here for length formulas and converter links.

Are ShoutingNow length converters free?

Yes. The Length Converter and every dedicated length pair tool are free to use in your browser with no account required.

Length Conversion Guide: Formulas, Charts & DIY Examples

Length conversion is what you do when a lumber yard lists boards in feet and inches, a European furniture site shows centimeters, or a site plan mixes meters with fractional inches. On a job site or in a weekend DIY project, the wrong scale turns a clean cut into a gap — or a piece that will not fit the opening. This guide covers the formulas, tables, and worked examples you need for everyday length conversion, then links every ShoutingNow length tool.

Convert length now: Open the free Length Converter — pick any from/to pair, enter a value, and get an instant result. No sign-up required.

What length conversion is (and why it matters on site)

Length measures one dimension: how far from A to B. Converting length means rewriting that same distance in another unit — inches to centimeters, feet to meters, millimeters to inches — without changing the physical size. Builders, remodelers, and makers hit this constantly: tape measures in inches, product specs in mm, architectural drawings in meters, and online orders that switch systems mid-cart.

Unlike area or volume, length factors are linear. Double the number of inches and you double the centimeters. That simplicity is helpful — until mixed feet-and-inches notation or early rounding throws a cut list off by a few millimeters.

Plain-language length formulas

Memorize a few anchors; use a converter when you need many decimals:

Inches ↔ centimeters: multiply inches by 2.54 for cm (exact). Divide cm by 2.54 for inches.
Feet ↔ inches: multiply feet by 12. Divide inches by 12 for feet (keep the remainder as inches when you need ft/in).
Meters ↔ feet: multiply meters by 3.28084 for feet. Divide feet by 3.28084 for meters.
Millimeters ↔ inches: divide mm by 25.4 for inches. Multiply inches by 25.4 for mm.
Miles ↔ kilometers: multiply miles by 1.60934 for km.

For feet-and-inches as a single height or cut (for example 5 ft 7 in), convert the whole quantity to inches first, then to metric — or use a dedicated feet-inches tool so you do not drop the inch remainder.

Length conversion tables

Centimeters to inches

cm	inches (approx.)
2.5	0.98
10	3.94
30	11.81
91.44	36.00 (3 ft)
152.4	60.00 (5 ft)

Feet to meters

feet	meters (approx.)
1	0.305
8	2.438
12	3.658
16	4.877
25	7.620

Need a one-off pair? Try the centimeters to inches converter or the feet to meters converter.

Worked examples

Example 1 — shelf depth from a metric listing

An online shelf is listed as 38.5 cm deep. Your wall niche was framed to 15 in. Convert: 38.5 ÷ 2.54 ≈ 15.16 in. The shelf is about 0.16 in deeper than the niche — too tight without trimming or a different SKU.

Example 2 — stud bay to metric hardware

A rough opening is 6 ft 3 in wide. Total inches: (6 × 12) + 3 = 75 in. In meters: 75 × 0.0254 = 1.905 m. Order metric trim or glass to that clear width, not to “about 1.9 m” rounded early.

Example 3 — driveway stake spacing

Plans call for posts every 2.75 m. In feet: 2.75 × 3.28084 ≈ 9.02 ft (about 9 ft ¼ in). Mark the tape at 9 ft 0 in and add a quarter inch rather than guessing “nine feet.”

Common length conversion mistakes

Treating feet-inches as a decimal. “5.7 ft” is not the same as 5 ft 7 in (5.7 ft = 5 ft 8.4 in).
Squaring a length factor for area. Length uses 2.54 for in↔cm; area uses 2.54². Do not reuse length factors on floor plans.
Rounding mid-cut list. Convert once at full precision, then round the final mark on the board.
Mixing mm and cm on the same drawing. Confirm the drawing unit before you scale a dimension.

Length converter tools

Start with the multi-unit Length Converter, or jump to a dedicated pair:

Construction measurement tips — trade and DIY habits that keep cuts and layouts accurate
Unit conversion chart & calculator guide — map of every category guide on ShoutingNow