--- title: "Fraction to decimal chart for inches, with mm and feet" description: "A fraction to decimal chart for every 64th of an inch, with millimeters and decimal feet, plus inches to decimal feet. Free printable PDF, US Letter." canonical: https://klmlabs.app/construction-calculator/fraction-decimal-inch-chart/ updated: 2026-11-07 --- # Fraction to decimal chart: inches, millimeters and feet Divide the top number by the bottom one: 5/8" is 5 ÷ 8 = 0.625". The chart does it for every 64th of an inch, with millimeters and decimal feet. Download the printable chart (PDF, US Letter, 1 page, 32 KB): https://klmlabs.app/construction-calculator/charts/fraction-decimal-inch-chart.pdf. Every number is worked out by Construction Calculator 1.1.1's own formulas. ## Fractions of an inch to decimals and millimeters, 1/64" to 1" | Fraction | Decimal | mm | Feet | |---|---:|---:|---:| | 1/64" | 0.015625 | 0.396875 | 0.001302 | | 1/32" | 0.03125 | 0.79375 | 0.002604 | | 3/64" | 0.046875 | 1.190625 | 0.003906 | | 1/16" | 0.0625 | 1.5875 | 0.005208 | | 5/64" | 0.078125 | 1.984375 | 0.00651 | | 3/32" | 0.09375 | 2.38125 | 0.007813 | | 7/64" | 0.109375 | 2.778125 | 0.009115 | | 1/8" | 0.125 | 3.175 | 0.010417 | | 9/64" | 0.140625 | 3.571875 | 0.011719 | | 5/32" | 0.15625 | 3.96875 | 0.013021 | | 11/64" | 0.171875 | 4.365625 | 0.014323 | | 3/16" | 0.1875 | 4.7625 | 0.015625 | | 13/64" | 0.203125 | 5.159375 | 0.016927 | | 7/32" | 0.21875 | 5.55625 | 0.018229 | | 15/64" | 0.234375 | 5.953125 | 0.019531 | | 1/4" | 0.25 | 6.35 | 0.020833 | | 17/64" | 0.265625 | 6.746875 | 0.022135 | | 9/32" | 0.28125 | 7.14375 | 0.023438 | | 19/64" | 0.296875 | 7.540625 | 0.02474 | | 5/16" | 0.3125 | 7.9375 | 0.026042 | | 21/64" | 0.328125 | 8.334375 | 0.027344 | | 11/32" | 0.34375 | 8.73125 | 0.028646 | | 23/64" | 0.359375 | 9.128125 | 0.029948 | | 3/8" | 0.375 | 9.525 | 0.03125 | | 25/64" | 0.390625 | 9.921875 | 0.032552 | | 13/32" | 0.40625 | 10.31875 | 0.033854 | | 27/64" | 0.421875 | 10.715625 | 0.035156 | | 7/16" | 0.4375 | 11.1125 | 0.036458 | | 29/64" | 0.453125 | 11.509375 | 0.03776 | | 15/32" | 0.46875 | 11.90625 | 0.039063 | | 31/64" | 0.484375 | 12.303125 | 0.040365 | | 1/2" | 0.5 | 12.7 | 0.041667 | | 33/64" | 0.515625 | 13.096875 | 0.042969 | | 17/32" | 0.53125 | 13.49375 | 0.044271 | | 35/64" | 0.546875 | 13.890625 | 0.045573 | | 9/16" | 0.5625 | 14.2875 | 0.046875 | | 37/64" | 0.578125 | 14.684375 | 0.048177 | | 19/32" | 0.59375 | 15.08125 | 0.049479 | | 39/64" | 0.609375 | 15.478125 | 0.050781 | | 5/8" | 0.625 | 15.875 | 0.052083 | | 41/64" | 0.640625 | 16.271875 | 0.053385 | | 21/32" | 0.65625 | 16.66875 | 0.054688 | | 43/64" | 0.671875 | 17.065625 | 0.05599 | | 11/16" | 0.6875 | 17.4625 | 0.057292 | | 45/64" | 0.703125 | 17.859375 | 0.058594 | | 23/32" | 0.71875 | 18.25625 | 0.059896 | | 47/64" | 0.734375 | 18.653125 | 0.061198 | | 3/4" | 0.75 | 19.05 | 0.0625 | | 49/64" | 0.765625 | 19.446875 | 0.063802 | | 25/32" | 0.78125 | 19.84375 | 0.065104 | | 51/64" | 0.796875 | 20.240625 | 0.066406 | | 13/16" | 0.8125 | 20.6375 | 0.067708 | | 53/64" | 0.828125 | 21.034375 | 0.06901 | | 27/32" | 0.84375 | 21.43125 | 0.070313 | | 55/64" | 0.859375 | 21.828125 | 0.071615 | | 7/8" | 0.875 | 22.225 | 0.072917 | | 57/64" | 0.890625 | 22.621875 | 0.074219 | | 29/32" | 0.90625 | 23.01875 | 0.075521 | | 59/64" | 0.921875 | 23.415625 | 0.076823 | | 15/16" | 0.9375 | 23.8125 | 0.078125 | | 61/64" | 0.953125 | 24.209375 | 0.079427 | | 31/32" | 0.96875 | 24.60625 | 0.080729 | | 63/64" | 0.984375 | 25.003125 | 0.082031 | | 1" | 1 | 25.4 | 0.083333 | To 6 decimal places. Shaded rows are sixteenths, the marks on most tapes. ## Inches to decimal feet, 0" to 11-7/8" | Inches | + 0 | + 1/8 | + 1/4 | + 3/8 | + 1/2 | + 5/8 | + 3/4 | + 7/8 | |---|---:|---:|---:|---:|---:|---:|---:|---:| | 0" | 0 | 0.0104 | 0.0208 | 0.0313 | 0.0417 | 0.0521 | 0.0625 | 0.0729 | | 1" | 0.0833 | 0.0938 | 0.1042 | 0.1146 | 0.125 | 0.1354 | 0.1458 | 0.1563 | | 2" | 0.1667 | 0.1771 | 0.1875 | 0.1979 | 0.2083 | 0.2188 | 0.2292 | 0.2396 | | 3" | 0.25 | 0.2604 | 0.2708 | 0.2813 | 0.2917 | 0.3021 | 0.3125 | 0.3229 | | 4" | 0.3333 | 0.3438 | 0.3542 | 0.3646 | 0.375 | 0.3854 | 0.3958 | 0.4063 | | 5" | 0.4167 | 0.4271 | 0.4375 | 0.4479 | 0.4583 | 0.4688 | 0.4792 | 0.4896 | | 6" | 0.5 | 0.5104 | 0.5208 | 0.5313 | 0.5417 | 0.5521 | 0.5625 | 0.5729 | | 7" | 0.5833 | 0.5938 | 0.6042 | 0.6146 | 0.625 | 0.6354 | 0.6458 | 0.6563 | | 8" | 0.6667 | 0.6771 | 0.6875 | 0.6979 | 0.7083 | 0.7188 | 0.7292 | 0.7396 | | 9" | 0.75 | 0.7604 | 0.7708 | 0.7813 | 0.7917 | 0.8021 | 0.8125 | 0.8229 | | 10" | 0.8333 | 0.8438 | 0.8542 | 0.8646 | 0.875 | 0.8854 | 0.8958 | 0.9063 | | 11" | 0.9167 | 0.9271 | 0.9375 | 0.9479 | 0.9583 | 0.9688 | 0.9792 | 0.9896 | Row inches plus column fraction, in feet to 4 places: 7-3/8" is 0.6146 ft. ## Decimal inches to the nearest tape fraction | Decimal inch | Nearest 1/8" | Nearest 1/16" | Nearest 1/32" | |---|---:|---:|---:| | 0.05 | ≈ 0" | ≈ 1/16" | ≈ 1/16" | | 0.10 | ≈ 1/8" | ≈ 1/8" | ≈ 3/32" | | 0.15 | ≈ 1/8" | ≈ 1/8" | ≈ 5/32" | | 0.20 | ≈ 1/4" | ≈ 3/16" | ≈ 3/16" | | 0.25 | 1/4" | 1/4" | 1/4" | | 0.30 | ≈ 1/4" | ≈ 5/16" | ≈ 5/16" | | 0.35 | ≈ 3/8" | ≈ 3/8" | ≈ 11/32" | | 0.40 | ≈ 3/8" | ≈ 3/8" | ≈ 13/32" | | 0.45 | ≈ 1/2" | ≈ 7/16" | ≈ 7/16" | | 0.50 | 1/2" | 1/2" | 1/2" | | 0.55 | ≈ 1/2" | ≈ 9/16" | ≈ 9/16" | | 0.60 | ≈ 5/8" | ≈ 5/8" | ≈ 19/32" | | 0.65 | ≈ 5/8" | ≈ 5/8" | ≈ 21/32" | | 0.70 | ≈ 3/4" | ≈ 11/16" | ≈ 11/16" | | 0.75 | 3/4" | 3/4" | 3/4" | | 0.80 | ≈ 3/4" | ≈ 13/16" | ≈ 13/16" | | 0.85 | ≈ 7/8" | ≈ 7/8" | ≈ 27/32" | | 0.90 | ≈ 7/8" | ≈ 7/8" | ≈ 29/32" | | 0.95 | ≈ 1" | ≈ 15/16" | ≈ 15/16" | Rounded to the nearest mark; half a mark rounds up. ≈ means the decimal falls between marks. ## What is 0.625 in inches? 0.625" is 5/8". For any decimal, multiply by 16 to get sixteenths: 0.625 × 16 = 10, so 10/16", or 5/8". ## Where is 3/8 on a tape measure? 3/8" is 6/16": the sixth small mark past the inch on a 1/16" tape, at 0.375" or 9.525 mm. ## How do I round a decimal to the nearest mark? Multiply by 16 and round: 0.3" × 16 = 4.8, which rounds to 5, so 0.3" is about 5/16". The last table does 0.05" to 0.95". ## How do I turn millimeters into inches? Divide by 25.4: an inch is exactly 25.4 mm. 10 mm is 0.393701", which is 3/8" to the nearest sixteenth. ## How do I turn inches into decimal feet? Divide by 12: 7-3/8" is 7.375 ÷ 12 = 0.6146 ft. The second table does every 1/8" to 11-7/8". ## Work out your own with Construction Calculator - Type 5' 7-3/8" and do the math exactly - Answers to the nearest 1/16", or 1/2" to 1/64" - Inches, decimal feet and metric under every answer Download Construction Calculator on the App Store: https://apps.apple.com/us/app/fraction-feet-inch-calculator/id6816445977 Free to download, with in-app purchases. Every feature, the calculator included, needs the free trial or a purchase: Yearly US$9.99 a year with a 7-day free trial for eligible new subscribers, or Lifetime US$19.99 paid once (US prices). iPhone and iPad, iOS 17.0 or later. All the facts: https://klmlabs.app/construction-calculator/ ## The facts this page states, with sources As KLM Labs' fact record words them; the page may put them in its own words. Construction Calculator's facts page: https://klmlabs.app/construction-calculator/ - Add, subtract, multiply and divide feet, inches and fractions exactly, like 5' 7-3/8". (Source: [Apple's app lookup](https://itunes.apple.com/lookup?id=6816445977&country=us).) - Answers to the nearest 1/16", or any step from 1/2" to 1/64". (Source: the app's source code (private).) - Every length also shows in total inches, decimal feet and metric (cm, mm or m). (Source: the app's source code (private).) - 1 inch = 2.54 centimeters exactly (25.4 mm), and 1 foot = 0.3048 meter exactly. (Source: https://www.nist.gov/document/2026-nist-handbook-44-appendix-c (NIST Handbook 44, 2026, Appendix C; read 2026-11-06).) ## More construction charts - [How to calculate square footage from inches and fractions](https://klmlabs.app/construction-calculator/square-feet-from-feet-and-inches/): Multiply length × width in inches and divide by 144 for square feet. Worked examples with feet, inches and fractions, done exactly, and a printable chart. - [Roof pitch chart: degrees, slope and rafter length](https://klmlabs.app/construction-calculator/roof-pitch-chart/): A roof pitch chart from 1/12 to 24/12: the angle in degrees, slope percent, plumb and seat cuts, and rafter length per foot of run. Free printable PDF. - [How to calculate board feet](https://klmlabs.app/construction-calculator/board-feet/): A board foot is 144 cubic inches of lumber, 12" × 12" × 1". How to calculate board feet from nominal sizes, with a printable chart for 1x4 to 6x6. - [Stair rise and run code: 7-3/4" risers, 10" treads](https://klmlabs.app/construction-calculator/stair-rise-and-run/): The 2021 IRC limits for stair risers (7-3/4" max) and treads (10" min), the 7-11 rule, and worked stair layouts for rises from 2' to 10'. Free PDF. - [How many bags of concrete in a yard?](https://klmlabs.app/construction-calculator/concrete-bags-per-yard/): About 45 bags of 80 lb concrete make a cubic yard, 60 of 60 lb, 90 of 40 lb. A slab chart in yards and bags with 10% waste, as a free printable PDF. - [Crown molding angles chart: miter and bevel settings](https://klmlabs.app/construction-calculator/crown-molding-angles/): Miter and bevel settings for 52/38 and 45/45 crown molding cut flat on a compound miter saw, for wall corners from 60° to 150°. Free printable chart. All 7 construction charts: https://klmlabs.app/construction-calculator/guides/ ## Sources 1. [NIST Handbook 44 (2026), Appendix C: 1 inch = 2.54 centimeters exactly; 1 foot = 0.3048 meter exactly](https://www.nist.gov/document/2026-nist-handbook-44-appendix-c) 2. [NIST SP 811, Appendix B.9: conversion factors for length (inch to meter, 2.54 E-02, exact)](https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9) 3. [Fraction Feet Inch Calculator (Construction Calculator) on the App Store](https://apps.apple.com/us/app/fraction-feet-inch-calculator/id6816445977) Last updated November 7, 2026.