Seismology & Earthquakes
Seismological Settings
Damage negligible in buildings of good design and construction; slight to moderate in well-built ordinary structures; considerable damage in poorly built structures.
Explore Additional Utilities
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.
Cycling FTP & Power Zone Calculator
Calculate personalized cycling power training zones (Coggan 7-zone model) based on your Functional Threshold Power (FTP) in watts.
Clay shrinkage — wet size ↔ fired size
Calculate wet, bone-dry, and kiln-fired pottery dimensions and analyze total contraction rates.
Lux & Foot-Candles Photometry
Calculate architectural light levels, illuminance indexes, and foot-candle units.
Color Code Converter
Instantly convert between HEX, RGB, HSL, and CMYK color spaces with a visual real-time preview and slider inputs.
Unix Epoch Converter
Convert Unix epochs (seconds/milliseconds) to human-eye standard DateTimes, and transform local dates to Epoch times.
Paper weight — gsm ↔ lb bond ↔ lb cover ↔ lb text
Convert paper weights between Grams per Square Meter (GSM) and standard US basis weights (Bond, Text/Book, Cover).
Gray ↔ rad (Absorbed Dose)
Convert between Gray (Gy), rad, milligray (mGy), and microrad (µrad) to analyze absorbed ionizing radiation energy per unit mass.
Torque Converter
Convert rotating force indicators between Newton-meters (Nm), pound-feet (lb-ft), and kgf·m.
Certificate validity — days ↔ expiry date calculation
Convert between certificate lifetime in days, months, or years, and calculate exact UTC expiration times with leap year support.
Pace, Speed & Time Converter
Convert between different running paces and speeds (min/km, min/mile, km/h, mph) and predict race times.
Eye size — skull diameter ↔ glass eye mm
Estimate ideal glass taxidermy eye sizes (in mm) and pupil types from skull diameter, socket dimensions, or species.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
Weight-Based Medication Dosing
Calculate safe weight-based medicine dosages, volume outputs, and administration frequency.
Cosmic Distance Converter
Convert huge distances across Light Years, Parsecs, Astronomical Units, and Kilometers.
Carbon Footprint Calculator
Convert between distance driven (km or miles) and greenhouse gas emissions (kg CO2) across various vehicle fuel types and efficiencies.
Fabric Width Yardage Converter
Convert fabric yardage requirements between different standard widths like 44 inches and 60 inches.
Soil Plasticity Index Calculator
Calculate Plasticity Index (PI) from Liquid Limit (LL) and Plastic Limit (PL), and interpret soil state using the Atterberg limits chart.
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.
Yarn Weight Converter
Convert yarn sizes across WPI (Wraps Per Inch), ply, and standard weight categories.