Arch E3 paper size
Architectural sizes · ANSI/ASME Y14.1 (ARCH)
685.8 × 990.6 mm
27 × 39 in · 68.58 × 99.06 cm · 27 × 39 in
- Aspect ratio
- 1:1.44
- Area
- 6,793.5 cm² (1,053 in²)
- Pixels @ 300 dpi
- 8,100 × 11,700
- Used in
- North America
Arch E3 is 27 × 39 in (686 × 991 mm), an intermediate architectural sheet an inch larger than Arch E2. It is an uncommon size chosen when a drawing needs slightly more room than Arch D.
Arch E3 dimensions in every unit
Arch E3 size in inches, cm and mm
Arch E3 is 27 × 39 inches, or 68.58 × 99.06 cm (685.8 × 990.6 mm).
| Unit | Width | Height |
|---|---|---|
| Millimetres | 685.8 mm | 990.6 mm |
| Centimetres | 68.58 cm | 99.06 cm |
| Inches (decimal) | 27 in | 39 in |
| Inches (fraction) | 27 in | 39 in |
| Points | 1,944.0 pt | 2,808.0 pt |
| With 3 mm bleed | 691.8 mm | 996.6 mm |
Arch E3 size in pixels
At 300 dpi, the usual resolution for print, Arch E3 is 8,100 × 11,700 pixels. At 96 dpi, the screen resolution Word and web browsers use, it is 2,592 × 3,744 pixels.
| Unit | Width | Height |
|---|---|---|
| At 72 dpi | 1,944 px | 2,808 px |
| At 96 dpi | 2,592 px | 3,744 px |
| At 150 dpi | 4,050 px | 5,850 px |
| At 200 dpi | 5,400 px | 7,800 px |
| At 300 dpi | 8,100 px | 11,700 px |
| At 600 dpi | 16,200 px | 23,400 px |
What Arch E3 is used for
- Oversize commercial drawing sheets
- Roll plots with room for an Arch D drawing plus notes
- Site plans on 36 in plotters
- Presentation drawings
- Large prints close to ISO B1
Sizes around Arch E3
Printing on Arch E3
Arch E3 plots on a 36 in roll with 9 in to spare, cut to 39 in. Roll output has no unprintable margin, and Y14.1 recommends a 1 in drawing border on E-class sheets. Pre-cut 27 × 39 in stock is rare, so plan on roll media.
With 0.125 in bleed the artboard is 27.25 × 39.25 in (692 × 997 mm). At 300 dpi the sheet is 8100 × 11700 pixels.
An Arch D drawing fits on E3 at 100% with 1.5 in spare in each direction, or enlarges to fill it at 108%. Arch E3 sits inside ANSI E and A0 at 100% and reduces to Arch B at 44%. It is within 22 mm of ISO B1 (707 × 1000 mm), so B1 files print on E3 at 97%.
Where Arch E3 comes from
Arch E3 is the second intermediate E size in the architectural series of ANSI/ASME Y14.1. At 27 × 39 in it is a whole-inch step above Arch E2 and keeps a proportion close to 2:3. The size exists to give drawing offices a sheet that plots on a 36 in roll and holds a D-size drawing with extra margin for notes and schedules.
In practice Arch E3 is seldom stocked, and most reprographics houses treat it as a custom plot size.
Questions people ask about Arch E3
What is Arch E3 paper size?
Arch E3 is 27 × 39 in (686 × 991 mm), an intermediate architectural sheet in ANSI/ASME Y14.1.
What is Arch E3 in mm?
Arch E3 is 685.8 × 990.6 mm, rounded to 686 × 991 mm.
Is Arch E3 the same as Arch E2?
No. Arch E2 is 26 × 38 in, so E3 is 1 in larger in both directions.
Is Arch E3 close to ISO B1?
Yes. B1 is 707 × 1000 mm and Arch E3 is 686 × 991 mm, so a B1 layout fits on E3 at 97%.
Can I plot Arch E3 on a 36 in plotter?
Yes. The 27 in side runs across the roll with 9 in spare, and the sheet is cut to 39 in.