Sailing & Wind Mechanics
Interactive polar vector conversion, boat hydrostatic stability modeling, performance metrics, and navigation vector calculations.
1. Vector Heading & Drift Spec
2. Navigation Vector Triangle
Explore Additional Utilities
Melt point — wax type ↔ degrees Celsius ↔ Fahrenheit
Analyze melt points, fragrance addition temperatures, and pour temperatures for different waxes.
Hebrew ↔ Gregorian Calendar
Convert between the Hebrew lunisolar calendar and standard Gregorian dates, detailing standard Jewish months, holidays, and leap years.
Soil pH & Amendment Calculator
Calculate the required lime or sulfur applications needed to correct soil acidity/alkalinity for plant growth.
Generator sizing — equipment load ↔ kVA needed
Estimate generator apparent power capacity requirements by summing dynamic equipment active and reactive loads.
Mortar mix ratio — cement ↔ sand ↔ water by weight
Calculate standard masonry mortar mix classes (Type M, S, N, O, K) and determine precise cement, sand, and water weights.
pH adjustment — acid/alkali drops ↔ pH change estimate
Estimate acidifying or alkalizing solution amounts to safely adjust formulation pH values.
Shrink Wrap Roll Coverage
Determine how many pallets can be wrapped with a single shrink wrap roll based on roll dimensions, gauge, and layers.
Shorthand speed — words per minute ↔ strokes
Analyze cursive shorthand writing velocities (Gregg, Pitman, Teeline) to compare stroke density limits and WPM targets.
Compression ratio — bore + stroke + head volume
Calculate static compression ratios from cylinder bore, stroke, head chamber volume, gasket thickness, deck clearance, and dome/dish specs.
Battery capacity — Ah ↔ Wh ↔ days of autonomy
Convert between Amp-hours (Ah) and Watt-hours (Wh) and calculate battery bank backup days of autonomy based on loads.
Laser power density — watts ↔ W/cm² at given spot size
Calculate average and peak power intensity (W/cm²) on target spot sizes for Flat-Top and Gaussian profiles.
Handicap index ↔ course handicap — golf scoring
Translate USGA/R&A Handicap Index to Course Handicap with slope rating and course rating adjustments.
Torque Converter
Convert rotating force indicators between Newton-meters (Nm), pound-feet (lb-ft), and kgf·m.
Thermal conductivity — W/m·K ↔ BTU·in/hr·ft²·°F
Translate thermal conductivity values between W/m·K, BTU·in/hr·ft²·°F, and other units.
Solar irradiance — W/m² ↔ peak sun hours
Convert solar irradiance (W/m²) and daylight duration to Peak Sun Hours (PSH) and estimate daily solar panel system output.
Power to weight ratio — watts ↔ w/kg — cycling performance
Determine cycling performance power-to-weight ratio (W/kg) based on wattage and body weight.
Net metering — units exported ↔ bill credit estimate
Estimate utility bill credits, net energy offsets, and financial yields under 1:1 net metering or dual-rate net billing programs.
ISO Week Number ↔ Calendar Date
Calculate ISO 8601 week numbers, week dates, and determine start/end weekdays of any given week year.
Dialect vowel shift — IPA symbol ↔ regional pronunciation
Trace IPA vowel phonemes across global English dialects, analyzing shifts like the Northern Cities and Southern vowel rotations.
Shoe Size Converter
Convert footwear sizes across US, UK, Europe, and Japanese standards for men and women.