17 mm to Inches
Convert 17 millimeters to inches — instant, accurate, and easy
The Answer
Browse digital calipers on Amazon.
📄 Free printable mm to inches chart (PDF) — every mm from 1 to 300.
How to Convert 17 mm to Inches
To convert 17 millimeters to inches, divide the millimeter value by 25.4. This is because one inch equals exactly 25.4 millimeters — a standard defined by international agreement.
The Calculation
Applying the formula to 17 mm:
Result Summary for 17 mm
- Decimal inches: 0.6693″
- Fractional inches: 43/64″ (nearest 1/64)
- Feet and inches: 0 ft 0.67 in
17 mm Compared With 11/16 Inch
17 mm is approximately 0.6693 inches. The nearest 1/16-inch mark is 11/16 inch (17.4625 mm), 0.4625 mm above 17 mm.
A 21/32-inch size is 16.6687 mm, so it is 0.3313 mm smaller than 17 mm.
A 17 mm and an 11/16-inch wrench are not interchangeable: the 11/16-inch one is loose on a 17 mm nut, and a 17 mm wrench will not fit an 11/16-inch nut.
Reference Table — Values Near 17 mm
| Millimeters | Decimal Inches | Fractional Inches |
|---|---|---|
| 14 mm | 0.5512″ | 35/64″ |
| 15 mm | 0.5906″ | 19/32″ |
| 16 mm | 0.6299″ | 5/8″ |
| 17 mm | 0.6693″ | 43/64″ |
| 18 mm | 0.7087″ | 45/64″ |
| 19 mm | 0.7480″ | 3/4″ |
| 20 mm | 0.7874″ | 25/32″ |
17 mm in Other Units
Millimeters convert cleanly into every other length unit. Here is 17 mm expressed seven different ways — useful when a drawing, spec sheet or supplier quotes a unit other than inches.
| Unit | 17 mm equals |
|---|---|
| Centimeters (cm) | 1.7 cm |
| Meters (m) | 0.017 m |
| Inches (in) | 0.6693 in |
| Feet (ft) | 0.0558 ft |
| Yards (yd) | 0.01859 yd |
| Thousandths of an inch (mil) | 669.3 mil |
| Typographic points (1/72 in) | 48.19 pt |
How Accurate Is Each Fraction of 17 mm?
17 mm equals 0.6693″ (rounded to four decimal places). Any fraction is a further rounding of the full-precision value, so each one carries a small error. This table shows the closest fraction at each common denominator and how far it actually sits from 17 mm.
| Rounded to | Fraction | Decimal | Fraction vs. original |
|---|---|---|---|
| Nearest 1/2″ | 1/2″ | 0.5000″ | −4.300 mm (below original) |
| Nearest 1/4″ | 3/4″ | 0.7500″ | +2.050 mm (above original) |
| Nearest 1/8″ | 5/8″ | 0.6250″ | −1.125 mm (below original) |
| Nearest 1/16″ | 11/16″ | 0.6875″ | +0.463 mm (above original) |
| Nearest 1/32″ | 21/32″ | 0.6563″ | −0.331 mm (below original) |
| Nearest 1/64″ | 43/64″ | 0.6719″ | +0.066 mm (above original) |
For woodworking, DIY and general workshop use, 43/64″ is the practical choice — it lands within 0.4 mm of 17 mm. For machining, toolmaking or CAD, use the decimal value 0.6693″ rather than any fraction.
FAQ About 17 mm to Inches
How many inches is 17 mm?
17 millimeters equals 0.6693 inches (rounded to 4 decimal places), or approximately 43/64″ (nearest 1/64 inch).
How accurate is the 17 mm to inches conversion?
The conversion of 17 mm to 0.6693 inches uses the exact definition 1 inch = 25.4 millimeters; the four-decimal result is rounded, so it is approximate.
Can I convert 17 mm to feet?
Yes. 17 millimeters equals approximately 0 ft 0.67 in.
📏 Need to measure 17mm accurately?
Digital calipers typically display readings to 0.01 mm resolution, enough to check 17 mm (≈ 0.6693″). See current options:
→ See digital calipers on Amazon
Read our digital calipers buying guide →
As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.