Geotechnical & Soil Lab
Convert soil bearing capacities, calculate loose-compacted volumes, model groundwater hydraulic flow with Darcy\'s Law, interpret Atterberg limits, and run USCS sieve classifications.
USCS Soil Solver
Determine Unified Soil Classification System (USCS) soil symbols and descriptions from sieve and index test values.
Inorganic Lean Clay
Sandy or gravelly clay of low to medium plasticity.
Explore Additional Utilities
Water temperature ↔ dissolved oxygen capacity
Calculate the maximum theoretical dissolved oxygen (DO) saturation limits in water reservoirs across varying water temperatures.
Nautical Distance & Speed Sizer
Convert distances between nautical miles, statute miles, and kilometers, and calculate knot-based speeds.
Reading & Speaking Timer
Convert total word counts to estimated reading or speaking time at standard speeds.
Hijri ↔ Gregorian Calendar
Convert between Islamic Hijri calendar and standard Gregorian dates, with customized crescent visibility observation adjustments.
Likert scale ↔ numerical score
Convert Likert scale responses (e.g., 3-point, 5-point, 7-point, 10-point) into standardized numerical indices for survey research analytics.
Data Storage Units
Convert digital storage capacity sizes across bits, Bytes, MB, GB, and Terabytes.
Base64 Encoder
Encode textual strings to Base64 format, or decode Base64 back to raw text.
Audio Dynamic Range Calculator
Estimate dynamic range in decibels (dB) and quantization levels for any bit depth.
Yeast Equivalents Calculator
Calibrate biological yeast weights and convert between fresh, active dry, and instant yeasts.
International Hat Size Matcher
Convert hat dimensions across US, UK, and European standards.
Oven Temperature & Gas Marks
Convert oven temperature heat indexes between Celsius, Fahrenheit, and official Gas Marks.
BBQ Smoking Wood Quantity Calculator
Calculate the optimal quantity of smoking wood chunks or chips needed based on meat weight and type.
Exposure Triangle & F-Stop
Calculate absolute stop adjustments, exposure reciprocal tradeoffs, f-stop quotients, and ISO noise tradeoffs.
Roof Pitch Calculator
Convert between roof pitch ratios, degrees, and percentages, and calculate rafter lengths.
Hebrew ↔ Gregorian Calendar
Convert between the Hebrew lunisolar calendar and standard Gregorian dates, detailing standard Jewish months, holidays, and leap years.
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.
Roman Numeral Converter
Convert between classical Roman numerals (XIV, MCMLXX) and decimal integers dynamically.
Fiscal Year ↔ Calendar Year Mapping
Map calendar months and dates to custom corporate Fiscal Years (FY) and quarters (Q1–Q4) with customizable fiscal start months.
Body Mass Index (BMI) & Waist
Calculate Body Mass Index (BMI) and Waist-to-Height ratios to assess body composition.
Musical Note ↔ Frequency
Translate standard musical notes and octaves to precise audio hertz frequencies.