A-series reference
A5 paper size (148 × 210 mm → 5.83 × 8.27 in)
A5 has nominal trimmed dimensions of 148 × 210 mm, approximately 5.83 × 8.27 inches.
Maintained by mmtoinches.im · Updated
NIST describes the standard inch as exactly equivalent to 25.4 mm
. NIST length definition. ISO 216 — A and B series paper sizes. Method and limitations.
A5 is half of A4 and popular for booklets, invitations, and compact manuals. Use the details below for rounded inch conversions, booklet-friendly scaling, and reliable 2-up/4-up layouts on A4 or US Letter printers.
Dimensions
- Millimeters: 148 mm × 210 mm
- Inches: 5.83 in × 8.27 in
- Area: about 0.03108 m² (48.1 in²), half of A4
- Ratio: 1:sqrt(2), keeps proportions when doubled or halved
Print and binding tips
Scale A4 content to about 71 percent for A5. For booklets, enable duplex short-edge binding, add 7–10 mm inner gutter, and include 3 mm bleed if you expect trimming.
Where A5 works best
Booklets and guides
Travel guides, class handouts, and folded instructions that stay portable and affordable.
Invitations and cards
Thank-you cards, invitations, and journals that fit standard envelopes and mail rates.
Efficient printing
Use 2-up on A4 or Letter to save paper, then trim along crop marks for clean edges.
Print-resolution, bleed and margin examples are starting points, not ISO paper-size requirements. Follow the printer or publisher’s specifications; vector PDF content does not have a single image DPI.
Frequently Asked Questions
A5 is 148 × 210 millimeters, approximately 5.83 × 8.27 inches. It keeps the 1:sqrt(2) aspect ratio and has half the area of A4.
Use booklet mode or scale to roughly 71 percent (sqrt(2)/2), enable duplex short-edge binding, and add 7–10 mm inner gutter so the spine does not hide text.
Leave at least 5 mm safe margin on all sides; for print-ready files add 3 mm bleed plus crop marks to avoid trimming logos or text.
Sources and calculation notes
A5 has nominal trimmed dimensions of 148 × 210 mm, approximately 5.83 × 8.27 inches.
Method: Divide millimeters by 25.4 to obtain inches. The factor is exact; displayed decimal values are rounded. Fractional inches are rounded to the selected denominator.
Scope: The mm dimensions are nominal ISO trimmed sizes; inch values are rounded. Add bleed or printer margins separately.
Content maintained by mmtoinches.im. Updated and reference notes reviewed . How we calculate and present measurements. Sources support the stated definitions; examples and calculators are not certification of a product or compliance with a standard.