Oceanography Calculators
Assess marine salinity concentrations, translate oceanic depth parameters to hydrostatic pressure limits, estimate wave dynamics celerity indices, compute chlorophyll biological water color classes, and model thermohaline seawater densities.
Salinity Seawater
Convert between Practical Salinity Units (PSU), salinity concentration in g/kg (or ppt ‰), and percentage (%).
Salinity Inputs
Oceanographic Core Report
UNESCO 1981 / Medwin modelsSalinity Equivalent Concentration
Oceanographic calculations use precise equations of state and wave velocity physics. Physical densities adjust dynamically according to temperature and salinity to define thermohaline buoyancy currents.
Explore Additional Utilities
Eruption column height ↔ VEI — volcanic explosivity index
Correlate volcanic plume heights with Volcanic Explosivity Index (VEI) categories.
Prism Power Converter
Convert ophthalmic prism power between prism diopters (PD) and degrees of deviation, with light bending estimations.
Head Pressure Converter
Convert between hydrostatic head pressure (meters or feet of water) and fluid pressures like bar, PSI, Pascals, and atmospheres.
Soil Compaction Ratio Calculator
Calculate and convert soil compaction ratio, loose volume, compacted volume, and shrink/swell factor for cut-and-fill operations.
Gray ↔ rad (Absorbed Dose)
Convert between Gray (Gy), rad, milligray (mGy), and microrad (µrad) to analyze absorbed ionizing radiation energy per unit mass.
Zipper Length & Size Converter
Convert zipper lengths between centimeters and inches, and explore standard zipper gauge size applications.
Wind Turbine Power Generator
Estimate power output (watts) of a wind turbine based on wind speed, rotor diameter, blade sweep area, and aerodynamic power coefficients.
Pediatric Dosing Calculator
Estimate pediatric dosages from adult recommendations using standard pediatric clinical rules: Clark's, Young's, Webster's, Fried's, and BSA methods.
Drug Half-Life & Scheduling
Model drug half-life elimination, dosing accumulation ratios, times to steady-state, and clearance curves with interactive charts.
Diopter ↔ Focal Length Converter
Convert between lens diopters and focal length in meters, millimeters, or inches, and calculate eyeglass lens power requirements.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
VO2 Max & Aerobic Capacity Estimator
Convert running race times or heart rates into VO2 Max estimates and aerobic fitness classifications.
Half Value Layer (Shielding)
Calculate radiation intensity reduction through shielding materials (lead, steel, concrete, water) using half-value thickness and attenuation.
Pulp consistency — dry fiber % ↔ water ratio
Calculate dry fiber weight percentage in wet pulp slurry and water mixing dilution ratios for vat dipping.
Earthquake Magnitude (Richter ↔ Moment)
Convert and compare earthquake energy release, shaking amplitude, and felt effects between Richter (ML) and Moment Magnitude (Mw) scales.
Nutrient dilution — concentrate ratio ↔ final EC
Calculate water and liquid concentrate volumes for multi-part hydroponic reservoirs to achieve target mixing ratios and EC.
Becquerel ↔ curie (Activity)
Convert between Becquerels (Bq), Curies (Ci), rutherfords, and decay rates to evaluate isotope source strengths and nuclear decay events.
CMYK ↔ Pantone Matcher
Approximate CMYK values to the closest solid Pantone matching system (PMS) color swatch.
Sievert ↔ rem (Dose Equivalent)
Convert between Sieverts (Sv), rem, millisieverts (mSv), and millirem (mrem) to quantify biological effects and occupational radiation risk.
Tablet Splitting & Cost Calculator
Calculate tablet splitting doses, available whole/half combinations, cost savings, and review critical pill splitting safety guidelines.