Thread Weight System Converter
Convert between different thread density standards: Tex, Denier, Cotton Count (Ne), and Metric Count (Nm).
Ultra-light silk, lingerie, sheer mesh fabrics.
Standard lightweight sewing thread (shirts, blouses, fine linens).
Medium-weight quilting, standard denim, outerwear, workwear.
Heavy duty, upholstery, thin leather, boots, canvas bags.
Very heavy corded thread, thick leather, sails, heavy webbing.
Explore Additional Utilities
IV Drip Rate (Drops/min ↔ mL/hour)
Convert IV flow rates between mL/hour and drops/minute (gtt/min) for any drop factor, with real-time dripping rate animation.
Salinity for species — ppt ↔ specific gravity ↔ conductivity
Convert salinity values between ppt, Specific Gravity (SG), and Electrical Conductivity (mS/cm). Learn about species target zones.
Telescope Magnification Calculator
Calculate telescope magnification, exit pupil, and resolving limit from focal lengths and aperture.
Gather weight ↔ finished piece size estimate
Convert molten glass gather weight to finished dry piece volume and dimensions (hollow spheres, cylinders, bowls) based on thickness.
Cadence ↔ speed — gear ratio + RPM → km/h
Determine speed based on cadence (RPM), chainring/cog teeth counts, and tire circumference.
Annealing temperature — glass type ↔ strain point ↔ anneal point
Calculate strain point, anneal point, and custom cooling schedules based on glass type and thickness to prevent stress fractures.
Pattern scaling — original size ↔ scaled dimensions
Scale sewing and cutting patterns up or down uniformly. Convert dimensions between source and target sizes.
Covering material — book size ↔ cloth/leather dimensions
Determine required dimensions for book cloth, leather hide, or cover board wrapping based on book block margins.
Fiber preparation — raw fleece weight ↔ washed clean yield
Estimate washed clean fiber yield, grease/lanolin loss weight, and clean weight from raw animal fleeces by breed.
Exposure time — emulsion type ↔ UV source ↔ seconds
Estimate photo-emulsion exposure durations for screen printing frames or solar plates using light distance calculations.
Cabochon dome height ↔ base diameter ratio
Calculate cabochon dome proportions, bezel edge thickness, and curvature radii based on base shapes.
Quench rate — steel grade ↔ medium — oil vs water vs air
Identify ideal quench mediums and tempering guidelines for hardening various carbon and alloy steel grades.
Screen mesh count ↔ ink deposit thickness
Calculate screen printing wet ink layer thickness and emulsion coats based on screen mesh count and thread diameter.
Drawing out ratio — starting thickness ↔ final length
Estimate expanded length when forging down the cross-section thickness of hot steel bars under conservation of volume.
Formation — fiber length ↔ sheet uniformity estimate
Analyze pulp fiber lengths and slurry consistency to estimate flocculation risk and sheet formation uniformity.
Thermal strength — climb rate ↔ core diameter estimate
Estimate thermal core diameter, updraft velocity distribution (Gaussian profile), and optimal bank angle for maximum climb rate.
Signature count — total pages ↔ sheets per signature
Divide book blocks into balanced signatures and calculate standard folded sheet configurations.
Drug Concentration Converter
Convert pharmaceutical concentrations between % w/v, mg/mL, and mol/L using substance molecular weight presets.
Block count — wall area ↔ number of blocks needed
Calculate standard concrete masonry units (CMU) or clay bricks required for a wall, adjusting for joint widths and waste factors.
Drug Half-Life & Scheduling
Model drug half-life elimination, dosing accumulation ratios, times to steady-state, and clearance curves with interactive charts.