Tidal Rule of Twelfths Calculator
Estimate hourly tide heights and flow volumes between high and low tide periods using the standard maritime rule.
Explore Additional Utilities
Hash output size — MD5 ↔ SHA1 ↔ SHA256 ↔ SHA512 bits
Analyze hash function characteristics (MD5, SHA-1, SHA-2, SHA-3), including bit size, hex length, collision vulnerability, and use cases.
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.
Sign language handshape ↔ letter — fingerspelling reference
Deconstruct English words into ASL (American Sign Language) fingerspelling frames with custom thumb and palm configurations.
Stride length ↔ cadence ↔ running speed
Analyze running biomechanics: calculate speed based on cadence (SPM) and stride length.
Fragrance concentration — EDC ↔ EDT ↔ EDP ↔ parfum %
Calculate fragrance oil and diluent volumes/weights for Eau de Cologne, Toilette, Parfum, and Extrait profiles.
Planck units ↔ SI units — fundamental physics constants
Translate between SI physical units and the fundamental Planck natural units based on universal constants.
Form size — body measurement ↔ mannikin dimensions
Convert carcass or fresh animal field measurements (A, B, C, D) to standard taxidermy mannikin/form sizes.
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.
Refractive index ↔ critical angle — fiber optic design
Determine the boundary reflection critical angles and Fresnel reflection losses for Total Internal Reflection.
Drill bit size — inches ↔ mm ↔ gauge number
Convert drill bit diameters between fractional/decimal inches, millimeters, and drill gauge number sizes.
Key length ↔ security bits — RSA vs AES equivalence
Compare security levels (bits of security) across symmetric keys, RSA, and Elliptic Curve Cryptography (ECC) based on NIST standards.
Power to weight ratio — watts ↔ w/kg — cycling performance
Determine cycling performance power-to-weight ratio (W/kg) based on wattage and body weight.
DPI / PPI Converter
Convert image pixel dimensions into physical print sizes (inches/cm) at any target resolution.
Entropy bits ↔ password strength — character set + length
Calculate Shannon entropy bits based on character pool variety and length. Estimate brute-force resistance across various threat models.
Chemical Solutions Concentration
Convert chemical solutions concentration (Molarity ↔ Molality ↔ PPM) and analyze mass ratios.
Heat Index Feels-Like
Assess felt air heat indexes using ambient temperature and relative humidity thresholds.
Layer height ↔ print time estimator
Estimate 3D print duration changes and total layer counts when switching layer heights and print speeds.
Oxygen Saturation & PaO2 Converter
Convert blood oxygen saturation (SpO2) to partial pressure of oxygen (PaO2) using the clinical Severinghaus-Ellis model.
Scientific Temperature Scale
Convert scientific scales between Celsius, Fahrenheit, Kelvin, and Rankine thermal indicators.
Capacitor & Inductor Codes
Convert between capacitance and inductance units, and decode SMD/3-digit codes.