mm to feet and feet to mm converter

mm to feet: one foot is exactly 304.8 mm, so 2,400 mm = 7.874 ft. Type millimeters and the feet appear as you type, with the feet-and-inches form underneath; feet to mm uses the same box.

Example: Length 2,400 · Direction: mm to feet (mm → ft) → Answer: 2,400 mm = 7.874 ft. Source: NIST SP 811, Appendix B.8 – inch = 0.0254 m, foot = 0.3048 m, yard = 0.9144 m, mile = 1.609344 km (exact, international agreement of 1959). Updated: 5 October 2026.

Length

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Result

Answer: 2,400 mm = 7.874 ft
In feet and inches: In feet and inches: 7 ft 10.5 in.
Working: 2,400 mm ÷ 304.8 = 7.874 ft
Quick check in your head: 2,400 ÷ 300 ≈ 8 ft (exact: 7.874 ft). Dividing by 300 instead of 304.8 comes out about 1.6 % too high.
Conversion chart: mm ft
10 0.0328
25.4 0.0833
50 0.164
100 0.3281
150 0.4921
300 0.9843
304.8 1
500 1.64
600 1.969
1,000 3.281
1,200 3.937
1,500 4.921
2,000 6.562
2,400 7.874
2,440 8.005
3,000 9.843
5,000 16.404
Sizes worth knowing: Size mm ft
US plywood sheet width (4 ft) 1,219.2 4
Metric plywood sheet width (1,220 mm) 1,220 4.003
Standard door height (80 in) 2,032 6.667
Ceiling height (2,400 mm) 2,400 7.874
US plywood sheet length (8 ft) 2,438.4 8
25 ft tape measure 7,620 25; 1 ft = 304.8 mm is exact (0.3048 m, international foot of 1959). The feet-and-inches line is rounded to 0.1 in.

mm	ft
10	0.0328
25.4	0.0833
50	0.164
100	0.3281
150	0.4921
300	0.9843
304.8	1
500	1.64
600	1.969
1,000	3.281
1,200	3.937
1,500	4.921
2,000	6.562
2,400	7.874
2,440	8.005
3,000	9.843
5,000	16.404

Size	mm	ft
US plywood sheet width (4 ft)	1,219.2	4
Metric plywood sheet width (1,220 mm)	1,220	4.003
Standard door height (80 in)	2,032	6.667
Ceiling height (2,400 mm)	2,400	7.874
US plywood sheet length (8 ft)	2,438.4	8
25 ft tape measure	7,620	25

How it is calculated

The conversion

feet = millimeters ÷ 304.8, and millimeters = feet × 304.8. Since 1959 one foot is exactly 0.3048 m, which is 304.8 mm. So 1,000 mm = 3.281 ft, 3,000 mm = 9.843 ft and, back again, 8 ft = 2,438.4 mm.

Why decimal feet are awkward

A tape measure does not read 7.874 ft; it reads 7 ft 10.5 in. The converter therefore shows the feet-and-inches form too. 2,400 mm comes out as 7 ft 10.5 in, and the carry works correctly at the edges: a length of 1,219 mm is 4 ft 0 in, never “3 ft 12 in”. To get inches from the decimal part, multiply it by 12: 0.874 ft × 12 = 10.5 in.

Sheet goods and framing

Plywood and drywall in North America are 4 ft by 8 ft, which is 1,219.2 mm by 2,438.4 mm. In much of the rest of the world the same sheet is 1,220 × 2,440 mm, i.e. 4.003 ft by 8.005 ft: practically the same board, which is why metric drawings and imperial stock usually fit together. A ceiling of 2,400 mm is 7.874 ft, a little under the 8 ft ceiling that US framing assumes (2,438.4 mm), so an 8 ft sheet is 38.4 mm taller than the room.

Quick estimate

Divide by 300 for a rough figure: 1,500 mm is about 5 ft, while the exact answer is 4.921 ft. Dividing by 300 is 1.6 % high, harmless for a shopping list, too much for cutting. For millimeters in inches see mm to inches; for centimeters see cm to feet.

Frequently asked questions

How many feet is 1000 mm?

1,000 mm = 3.281 ft, or 3 ft 3.4 in.

How many mm are in a foot?

Exactly 304.8. 1 ft = 304.8 mm.

How do I convert mm to feet?

Divide by 304.8. For 2,400 mm: 2,400 ÷ 304.8 = 7.874, so 2,400 mm = 7.874 ft.

What is 3000 mm in feet and inches?

3,000 mm = 9.843 ft, which is 9 ft 10.1 in.

Is a 1220 x 2440 mm sheet the same as 4 x 8 ft?

Almost. 1,220 mm is 4.003 ft and 2,440 mm is 8.005 ft; a true 4 × 8 ft sheet is 1,219.2 × 2,438.4 mm, 1 to 2 mm smaller.

Sources and legal basis

As of: 5 October 2026 · Editorial policy