Skydiving & Parachute Calculator
Calculate freefall duration times, wing loading weights, canopy opening hard decks, and dropzone drift headings.
Configure Parameters
Recommended for beginners (1.0) to intermediate jumpers. Good combination of speed, response, and safe landings.
Explore Additional Utilities
Soil Permeability Converter
Convert coefficient of permeability (hydraulic conductivity) between cm/s, m/day, ft/day, and m/s with soil type drainage classifications.
Ocean depth ↔ pressure — bar per 10 meters rule
Calculate hydrostatic and total pressure in the ocean based on depth, water density, and gravity constants.
Electrode size ↔ amperage range — stick welding
Match stick electrode sizes (3/32", 1/8", 5/32") and classes (E7018, E6010, E6013) with optimal welding amperage ranges.
Depth of Field (DoF) Calculator
Evaluate depth of field, near/far sharp limits, and circle of confusion based on sensor crop factor, focal length, aperture, and subject distance.
Firewood volume — cords ↔ cubic meters ↔ cubic feet
Convert between cords, face cords, steres, and cubic volumes. Compute solid wood volumes, green or dry weight, and thermal BTU outputs.
Audio File Size & Sample Rate
Compute uncompressed audio files size based on sample rate, bit depth, and duration.
Time Zone Converter
Compare and convert times between universal time zones with ease.
Wind power density — wind speed ↔ watts per sq meter
Calculate available wind kinetic power density (W/m²) based on wind speed and localized air density characteristics.
Thread Weight Converter
Convert between different thread sizing standards including Tex, Denier, and Number English (Ne).
Cooking Unit Converter
Convert kitchen recipe volume structures: cups, milliliters, tablespoons, teaspoons, and fluid ounces.
Stage lighting — lux ↔ foot candles ↔ beam angle
Convert between Lux and Foot-candles, and compute beam diameter coverage footprint at specific throw distances.
Weld throat thickness ↔ leg length — fillet weld geometry
Convert between throat thickness and leg length for fillet welds. Estimate joint volume, weld weight, and shear load capacity.
Bullet drop — distance ↔ inches ↔ cm at given range
Estimate bullet drop trajectories over distance based on muzzle velocity, projectile mass, and gravitational pull.
File Transfer Duration
Dynamically forecast transmission speed durations for different file size sizes.
Displacement tonnage ↔ cubic meters — ship buoyancy
Convert ship displacement tonnage to submerged volume (m³) and buoyancy force. Choose between freshwater and saltwater standards.
Length Converter
Convert between meter, kilometer, centimeter, mile, yard, foot, inch, and more.
International Hat Size Matcher
Convert hat dimensions across US, UK, and European standards.
Aerodynamic drag — frontal area + CdA → watts at given speed
Determine power requirements (watts) to overcome aerodynamic drag based on rider CdA, air density, and speed.
Visual Acuity Converter
Convert visual acuity measurements between Snellen US (20/20), Snellen Metric (6/6), decimal, LogMAR, and Percentage systems.
Gear ratio (input RPM ↔ output RPM ↔ torque)
Calculate gear ratios and convert input RPM and torque to output values based on compound single or double-stage tooth configurations.