Side-by-Side Comparison
North American (ANSI & Arch)
ANSI E vs. US Letter
Comparing 2 standards across 10 specifications. 10 key differences identified.
Comparing:
ANSI E
US Letter
ANSI E is the largest standardized engineering sheet size defined by ANSI/ASME Y14.1, measuring 34.0 × 44.0 inches (863.6 × 1117.6 mm). Equal to 16 US Letter sheets, it is standard for full-scale commercial aerospace wing spars, naval ship general arrangements, and highway interchange profiles.
US Letter (ANSI A) is the standard business and consumer paper size in the United States, Canada, and parts of Mexico, measuring exactly 8.5 × 11.0 inches (215.9 × 279.4 mm). Standardized under ANSI/ASME Y14.1, it is slightly wider and shorter than the international ISO 216 A4 format.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Imperial)
|
34.00 × 44.00 in | 8.50 × 11.00 in |
|
Width × Height (Metric)
|
863.6 × 1117.6 mm | 215.9 × 279.4 mm |
|
Aspect Ratio
|
1 : 1.2941 (17 : 22) | 1 : 1.2941 (17 : 22 — not √2) |
|
ANSI Hierarchy
|
ANSI E = 2 × ANSI D = 4 × ANSI C = 8 × ANSI B = 16 × ANSI A | — |
|
International ISO Equivalent
|
A0 (841 × 1189 mm) | — |
|
Primary Applications
|
Aerospace structural drawings, naval ship construction plans, state highway transit maps | — |
|
ANSI Series Designation
|
— | ANSI A (Base engineering format) |
|
Comparison to ISO A4
|
— | US Letter is 5.9 mm wider and 17.6 mm shorter than A4 (210 × 297 mm) |
|
Standard Office Weight
|
— | 20 lb Bond (approx. 75 gsm) or 24 lb Bond (approx. 90 gsm) |
|
Matching Envelope Standard
|
— | US #10 Envelope (4.125 × 9.50 in / 104.8 × 241.3 mm) |