Textile & Fashion Suite
Streamline garment fitting, calculate pattern adjustments, and translate fabric weights and hardware standards used across global apparel manufacturing.
Zipper Length & Gauge Converter
Convert zip tracks between centimeters and inches, browse standard length presets, and find recommended zipper gauges (#3, #5, #8, #10) for your project.
Universal Medium Duty (#5)
5.8 mm teeth width
Everyday hoodies, jeans flies, tote bags, denim jackets, sleeping bags, boots.
Explore Additional Utilities
Cosmic Distance Converter
Convert huge distances across Light Years, Parsecs, Astronomical Units, and Kilometers.
Jewel count ↔ movement quality indicator
Explore movement bearing counts from 1 to 30+ jewels. See where rubies are placed and how they reduce mechanical friction.
Leather weight — oz ↔ mm thickness
Convert leather weights in ounces to exact millimeter or fractional inch thickness. View target usage categories.
Soil Plasticity Index Calculator
Calculate Plasticity Index (PI) from Liquid Limit (LL) and Plastic Limit (PL), and interpret soil state using the Atterberg limits chart.
Hallmark converter (UK date letters ↔ year)
Decode historic and modern UK silver, gold, and platinum hallmarks, converting assay office date letters to exact production years.
Sink rate — airspeed ↔ altitude loss per minute
Calculate glider sink rate in knots or m/s from airspeed and polar parameters, yielding altitude loss rate.
Kite size — wind speed ↔ rider weight
Calculate the recommended kite size in square meters (m²) based on rider weight and wind speed.
Nutrient dilution — concentrate ratio ↔ final EC
Calculate water and liquid concentrate volumes for multi-part hydroponic reservoirs to achieve target mixing ratios and EC.
Adhesive ratio — PVA ↔ paste ↔ water formulation
Formulate custom bookbinding adhesive mixtures (polyvinyl acetate and wheat starch paste) for perfect open time and flexibility.
Blanket size — horse length ↔ rug size in inches/cm
Calculate horse blanket (rug) sizing from point of shoulder to center of tail measurements in inches, centimeters, and UK/EU sizes.
Wet folding moisture — paper weight ↔ water absorption
Calculate optimal water moisture weight to apply based on paper GSM and wood fiber absorption capacity.
Twist per inch (TPI) — spinning wheel flyer ratio ↔ speed
Calculate twists per inch (TPI) based on flyer ratio, treadles per minute, and fiber intake rate.
Rivet size — leather thickness ↔ post length needed
Calculate the correct rivet post length based on your total leather material stack thickness and hardware style.
Reading & Speaking Timer
Convert total word counts to estimated reading or speaking time at standard speeds.
Grade converter — Yosemite ↔ French ↔ UIAA ↔ Australian
Convert climbing difficulty grades across Yosemite Decimal System (YDS), French, UIAA, Ewbank, and bouldering scales.
Calorie burn — elevation gain + weight → energy needed
Estimate metabolic calorie consumption based on hiker weight, pack weight, trip duration, and elevation profile.
Nautical Distance & Speed Sizer
Convert distances between nautical miles, statute miles, and kilometers, and calculate knot-based speeds.
Envelope size — letter size ↔ envelope dimensions needed
Match standard paper formats and fold styles to commercial envelope dimensions with proper clearance parameters.
Etching time — acid strength ↔ plate depth ↔ minutes
Estimate intaglio plate etching durations in nitric acid or ferric chloride based on metal type and Baumé strength.
Grout coverage — tile size ↔ joint width → bags needed
Estimate dry grout requirements based on tile dimensions, joint width, joint depth, and overall surface area.