Rope Size Conversion Chart
American weight and measures are based on units used in Britain prior to 1864, when imperial system was officially established. The US law of 1866 set a relationship withwith the metric system by defining the meter as equal to 39.37 inches. Since then all measures were redefined in terms of metric units with the last minimal adjustment in 1959. However, the old standard of 1 foot was retained with the name US survey foot.
Conversion Chart | Diameter Inch | Diameter Millimeters | Diameter Inch | Diameter Millimeters |
| 1/64" | 0.3969 mm | 1-1/64" | 25.7969 mm |
| 1/32" | 0.7938 mm | 1-1/32" | 26.1938 mm |
| 3/64" | 1.1096 mm | 1-1/16" | 26.9875 mm |
| 1/16" | 1.5875 mm | 1-1/8" | 28.5750 mm |
| 5/64" | 1.9844 mm | 1-1/4" | 31.7500 mm |
| 3/32" | 2.3813 mm | 1-5/16" | 33.3375 mm |
| 7/64" | 2.7781 mm | 1-3/8" | 34.9250 mm |
| 1/8" | 3.1750 mm | 1-7/16" | 36.5125 mm |
| 9/64" | 3.5719 mm | 1-1/2" | 38.1000 mm |
| 5/32" | 3.9688 mm | 1-9/16" | 39.6875 mm |
| 11/64" | 4.3656 mm | 1-5/8" | 41.2750 mm |
| 6/16" | 4.7625 mm | 1-11/16" | 42.8625 mm |
| 13/64" | 5.1594 mm | 1-3/4" | 44.4500 mm |
| 7/32" | 5.5563 mm | 1-7/8" | 47.6250 mm |
| 15/64" | 5.9531 mm | 2" | 50.8000 mm |
| 1/4" | 6.3500 mm | 2-1/64" | 51.1969 mm |
| 17/64" | 6.7469 mm | 2-1/32" | 51.5938 mm |
| 9/32" | 7.1438 mm | 2-1/16" | 52.3875 mm |
| 19/64" | 7.5406 mm | 2-1/8" | 53.9750 mm |
| 5/16" | 7.9375 mm | 2-1/4" | 57.1500 mm |
| 21/64" | 8.3344 mm | 2-5/16" | 58.7375 mm |
| 11/32" | 8.7313 mm | 2-3/8" | 60.3250 mm |
| 23/64" | 9.1281 mm | 2-7/16" | 61.9125 mm |
| 3/8" | 9.5250 mm | 2-1/2" | 63.5000 mm |
| 25/64" | 9.9219 mm | 2-9/16" | 65.0875 mm |
| 13/32" | 10.3188 mm | 2-5/8" | 66.6750 mm |
| 27/64" | 10.7156 mm | 2-11/16" | 68.2625 mm |
| 7/16" | 11.1125 mm | 2-3/4" | 68.8500 mm |
| 29/64" | 11.5094 mm | 2-7/8" | 73.0250 mm |
| 15/32" | 11.9063 mm | 3" | 76.2000 mm |
| 31/64" | 12.3031 mm | 3-1/64" | 76.5969 mm |
| 1/2" | 12.7000 mm | 3-1/32" | 76.9938 mm |
| 33/64" | 13.0969 mm | 3-1/6" | 77.7875 mm |
| 17/32" | 13.4938 mm | 3-1/8" | 79.3750 mm |
| 35/64" | 13.8906 mm | 3-1/4" | 82.5500 mm |
| 9/16" | 14.2875 mm | 3-5/16" | 84.1375 mm |
| 37/64" | 14.6844 mm | 3-3/8" | 85.7250 mm |
| 19/32" | 15.0813 mm | 3-7/16" | 87.3125 mm |
| 39/64" | 15.4781 mm | 3-1/2" | 88.9000 mm |
| 5/8" | 15.8750 mm | 3-9/16" | 90.4875 mm |
| 41/64" | 16.2719 mm | 3-5/8" | 92.0750 mm |
| 21/32" | 16.6688 mm | 3-11/16" | 93.6625 mm |
| 43/64" | 17.0656 mm | 3-3/4" | 95.2500 mm |
| 11/16" | 17.4625 mm | 3-7/8" | 98.4250 mm |
| 45/64" | 17.8594 mm | 4" | 101.6000 mm |
| 23/32" | 18.2563 mm | 4-1/16" | 103.1875 mm |
| 47/64" | 18.6531 mm | 4-1/8" | 104.7750 mm |
| 3/4" | 19.0500 mm | 4-1/4" | 107.9500 mm |
| 49/64" | 19.4469 mm | 4-5/16" | 109.5375 mm |
| 25/32" | 19.8438 mm | 4-3/8" | 111.1250 mm |
| 51/64" | 20.2406 mm | 4-7/16" | 112.7125 mm |
| 13/16" | 20.6375 mm | 4-1/2" | 114.3000 mm |
| 53/64" | 21.0344 mm | 4-9/16" | 115.8875 mm |
| 27/32" | 21.4313 mm | 4-5/8" | 117.4750 mm |
| 55/64" | 21.8281 mm | 4-3/4" | 120.6500 mm |
| 7/8" | 22.2250 mm | 4-7/8" | 123.8250 mm |
| 57/64" | 22.6219 mm | 5" | 127.0000 mm |
| 29/32" | 23.0188 mm | 5-1/8" | 130.1500 mm |
| 59/64" | 23.4156 mm | 5-1/4" | 133.3500 mm |
| 15/16" | 23.1825 mm | 5-5/16" | 134.9375 mm |
| 61/64" | 24.2094 mm | 5-3/8" | 136.5250 mm |
| 31/32" | 24.6063 mm | 5-1/2" | 137.7000 mm |
| 63/64" | 25.0031 mm | 5-9/16" | 141.2875 mm |
| 1" | 25.4000 mm | 5-3/4" | 146.0500 mm |
Is the size you're looking for not listed? Use the formulas below to calcilate.
US Standard to Metric Conversion Chart | To Convert | Into | Multiply By |
| Inches | Centimeters | 2.54 |
| Feet | 0.0833 |
| Millimeters | 25.4 |
| Meters | 0.0254 |
| Yards | 0.0278 |
| Yards | Inches | 36 |
| Feet | 3 |
| Meters | 0.914 |
| Miles | 0.0005682 |
| Miles | Feet | 5280 |
| Yards | 1760 |
| Kilometers | 1.609 |
Metric Linear Conversion Chart | To Convert | Into | Multiply By |
| Centimeters | Inches | 0.394 |
| Feet | 0.0328 |
| Meters | 0.01 |
| Millimeters | 10 |
| Meters | Centimeters | 100 |
| Feet | 3.281 |
| Inches | 39.37 |
| Kilometers | 0.001 |
| Miles | 0.0006214 |
| Millimeters | 1000 |
| Yards | 1.093 |
| Kilometers | Feet | 3281 |
| Meters | 1000 |
| Miles | 0.621 |
FAQs
Determine the circumference of the rope with a small thin string or whipping twine. Measure the length of the string with a ruler and divide the number by π (3.14159). This should give you the diameter of the rope.
What size is #5 rope? ›
Rope Size Chart
| Size Number | Metric Nominal Diameter | Rope Circumference |
|---|
| #5 | 5 mm | 5/8" |
| #6 | 6 mm | 3/4" |
| #8 | 8 mm | 1" |
| #10 | 10 mm | 1-1/8" |
54 more rowsThe measured diameter of a rope is the diameter of a circle which encircles the circumference of the wire rope and therefore when measuring a rope, it must be measured across the largest diameter, as shown to the right.
How big is 3/8 rope? ›
Rope Menu
| Diameter Inch | Diameter Millimeters |
|---|
| 3/8" | 9.5250 mm |
| 25/64" | 9.9219 mm |
| 13/32" | 10.3188 mm |
| 27/64" | 10.7156 mm |
60 more rowsRope length: You'll want to start with a rope that is between 25 and 35 feet long, ideal for both children and adult beginners. We recommend you start with a head rope with a length of between 30 and 32 feet. Soft feel: Also called the "lay," the softness of the rope is crucial to roping for beginners.
What size is number 4 rope? ›
#4 (1/8" Diameter) and #4-1/2 (9/64" Diameter) rope is used on most chain saws and larger 2-cycle engines. #4-1/2 (9/64" Diameter), #5 (5/32" Diameter) and #5-1/2 (11/64" Diameter) rope is used on most 4-cycle push mower small engines.
How do you measure rope by hand? ›
Rope Measurement Recommendations
These recommendations state that the rope sample should be laid out straight on a flat surface with slight hand force or lightly tensioned by hand to measure the length. The rope should not be curved or twisted at any point along its length.
What does xxs mean in ropes? ›
The order of lays, from softest to most firm is as follows: XXXS (super super soft), XXS (super soft), XS (extra soft), S (soft), MS (medium soft), M (medium), HM (hard medium), MH (medium hard).
What is the best diameter rope? ›
9.5 - 9.9mm single ropes: A single rope in this range is good for all-around use, including trad and sport climbing. These ropes are light enough to take into the mountains yet durable enough for top-roping at the local crag. They're generally more durable than very skinny ropes and they are easier to handle.
What diameter is two person rope? ›
For this reason, twin ropes are mainly used in alpine climbing, mixed climbing and ice climbing. Twin ropes range from 6.9mm to 9mm diameters. Twin ropes are often even lighter and thinner than half ropes. Twin ropes are tested in a double strand according to standard EN 892 with a test mass of 80 kg.
Rope Strength Guide
| NYLON DOUBLE BRAID |
|---|
| 1/4" | 6 | 340 |
| 3/8" | 10 | 820 |
| 1/2" | 13 | 1,460 |
| 5/8" | 16 | 2,920 |
18 more rowsUltra-High Molecular Weight Polyethylene Hollow Braid Rope (HMPE) - 1/8 inch (3mm) Click Here To Request A Custom Quote!
What is the difference between a calf rope and a breakaway rope? ›
Calf ropers, also known as tie down ropers, secure the end of the rope to their saddle while breakaway ropers tie the end of the rope with a thin string that is designed to “break away” from the saddle for the time to stop. Both calf and breakaway ropes are softer and often more weighted than team ropes.
What determines the size of a wire rope? ›
Rope diameters are determined by measuring the circle that just touches the extreme outer limits of the strands— that is, the greatest dimension that can be measured with a pair of parallel-jawed calipers or machinist's caliper square.
How do you calculate wire rope size? ›
For example: Rope dia (D) = 12 mm SWL (kg) = D2 (mm) x 8 = D (mm) x D (mm) x 8 = 12 x 12 x 8 = 1152 kg SWL (t) = 1.15 tonnes The above equation can be reversed to calculate the diameter (D) in millimetres of FSWR needed to lift a given load.
What is the rope trick dimension? ›
You touch a length of rope that is up to 60 feet long. One end of the rope then rises into the air until the whole rope hangs perpendicular to the ground. At the upper end of the rope, an invisible entrance opens to an extradimensional space that lasts until the spell ends.
How to measure rope by hand? ›
Rope Measurement Recommendations
These recommendations state that the rope sample should be laid out straight on a flat surface with slight hand force or lightly tensioned by hand to measure the length. The rope should not be curved or twisted at any point along its length.
