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
Scale factor (model size ↔ real world)
Convert dimensions between model design sizes and physical real-world scale targets, including imperial/metric conversions.
Supersonic Mach Speed
Assess sonic speed boundaries and atmospheric Mach velocities relative to local dry conditions.
Lumber Size & Board Feet Calculator
Calculate board feet volume, convert between nominal and actual lumber sizes, and estimate weights.
Oven Temperature & Gas Marks
Convert oven temperature heat indexes between Celsius, Fahrenheit, and official Gas Marks.
IQ score ↔ percentile rank
Map IQ scores (with standard deviations 15 or 16) to cognitive percentile ranks, rarity indices, and standard intelligence brackets.
Specific heat capacity — J/kg·K ↔ BTU/lb·°F
Convert between specific heat capacity units including J/kg·K, kJ/kg·°C, BTU/lb·°F, and cal/g·°C.
Steel grade equivalents — ASTM ↔ EN ↔ JIS standards
Cross-reference standard steel grades across ASTM/AISI, EN/DIN, and JIS systems. Includes chemical composition and key mechanical limits.
Atomic mass units ↔ grams — mole calculations
Convert Atomic Mass Units (u / Da) to grams or kilograms, and compute molar quantities of chemical elements.
Angular Motor Rotation
Determine crankshaft engine RPM, radian ratios, and angular physical velocities.
Dye concentration — owf % ↔ grams per liter
Convert textile dyestuff concentration between on weight of fiber (% owf) and grams per liter (g/L).
Ink coverage — % coverage ↔ grams per sq meter
Estimate wet/dry printing ink consumption and layer weight based on sheet area and CMYK channel coverage percentages.
Heat Index Feels-Like
Assess felt air heat indexes using ambient temperature and relative humidity thresholds.
Chart Scale Converter
Convert map dimensions in millimeters to real-world marine navigation distances or vice versa based on nautical chart scale.
Explosive charge weight — rock volume ↔ kg of explosive
Estimate required explosives (kg, lbs) for blasting a rock volume using powder factor models for open-pit mining.
pH adjustment — acid/alkali drops ↔ pH change estimate
Estimate acidifying or alkalizing solution amounts to safely adjust formulation pH values.
Ballistic Mils ↔ Angles
Convert between ballistics mils (NATO, Warsaw, Swedish), degrees, and MOA, with range estimation calculators.
GPS Format Converter
Convert global latitude and longitude between Decimal Degrees (DD) and Degrees Minutes Seconds (DMS).
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.
Data Storage Units
Convert digital storage capacity sizes across bits, Bytes, MB, GB, and Terabytes.
ISO Week Number ↔ Calendar Date
Calculate ISO 8601 week numbers, week dates, and determine start/end weekdays of any given week year.