Sailing & Wind Mechanics
Interactive polar vector conversion, boat hydrostatic stability modeling, performance metrics, and navigation vector calculations.
1. Wind Calculation Direction
Sailing as close to the wind as possible.
2. Vector Dynamics Visualizer
Explore Additional Utilities
Water resistance — ATM ↔ bar ↔ meters depth rating
Convert water pressure tolerances across ATM, Bar, and depth meters. Understand safe real-world water sport activities.
Growing medium volume — container size ↔ liters needed
Determine the volume of clay pebbles, coco coir, perlite, or soil needed in liters based on net pot size or grow container dimensions.
Oxygen Saturation & PaO2 Converter
Convert blood oxygen saturation (SpO2) to partial pressure of oxygen (PaO2) using the clinical Severinghaus-Ellis model.
Lumber Size & Board Feet Calculator
Calculate board feet volume, convert between nominal and actual lumber sizes, and estimate weights.
pH adjustment — acid/alkali drops ↔ pH change estimate
Estimate acidifying or alkalizing solution amounts to safely adjust formulation pH values.
Translation Pages & Pricing Converter
Convert document page count to word and character counts, and calculate translation pricing for multiple languages and target audiences.
Recycling Weight & Resource Savings Calculator
Convert quantities of recycled materials (plastic, glass, paper, aluminum) into greenhouse gases, water, and landfill space saved.
Pace, Speed & Time Converter
Convert between different running paces and speeds (min/km, min/mile, km/h, mph) and predict race times.
Paint Coverage Calculator
Estimate the gallons or liters of paint needed based on area and number of coats.
International Hat Size Matcher
Convert hat dimensions across US, UK, and European standards.
Watch case size — mm diameter ↔ lug width
Analyze watch case diameter proportions, lug-to-lug spans, and find the corresponding standard strap lug-width sizes.
Karat purity (Karat ↔ Fineness ↔ % gold)
Convert gold purity levels between Karat values, parts-per-thousand millesimal fineness, and pure gold percentage.
Flow velocity — pipe diameter + flow rate → m/s
Calculate average fluid flow velocity from pipe size or inner diameter and volumetric flow rate values.
Propeller pitch ↔ boat speed — theoretical boat speed
Calculate theoretical boat speed and actual speed based on propeller pitch, engine RPM, gear ratio, and hull slip percentages.
Seed Sowing Rate Estimator
Calculate seed sowing rates based on target populations, thousand-kernel weight (TKW), and field survival ratios.
Brick Count Estimator
Calculate bricks, mortar volume, sand, and cement needed for masonry walls.
Thermal expansion coefficient — glaze fit calculation
Predict glaze-on-clay crazing or shivering by matching thermal expansion coefficients (COE).
Octave Band Converter
Calculate center frequencies, upper/lower band limits, and bandwidths for fractional octave bands (1/1, 1/3 octaves).
Tidal current ↔ drift
Calculate course to steer and speed over ground (or set and drift) to compensate for tidal current and wind leeway.
Diopter ↔ Focal Length Converter
Convert between lens diopters and focal length in meters, millimeters, or inches, and calculate eyeglass lens power requirements.