Water Footprint & Virtual Water Calculator
Calculate the total direct and indirect water required to produce standard goods, food choices, and lifestyle items.
This volume is known as "virtual water" because it is hidden in the agricultural growth, shipping, processing, and manufacturing chains of the products you consume.
Explore Additional Utilities
Base64 ↔ hex ↔ binary — encoding format converter
Convert raw text strings or bytes bidirectionally between Base64, Hexadecimal, Binary, and standard ASCII formats.
Zipper Length & Size Converter
Convert zipper lengths between centimeters and inches, and explore standard zipper gauge size applications.
Jess length ↔ bird leg diameter — equipment fitting
Calculate required jess length, leash scale, and anklet widths based on raptor leg diameter or tarsus metrics.
Cloud Base Height Estimator
Estimate cloud condensation levels and cloud base height based on temperature and dewpoint spreads.
Stepper motor steps (degrees ↔ steps ↔ microsteps)
Convert between motor rotation angles in degrees, physical steps, and microsteps based on step angle and microstepping resolution.
Mohs Hardness & Scratch Resistance
Compare minerals, absolute hardness values, and scratch interactions using the classic 1-10 Mohs scale and Knoop indentation hardness.
Drug Concentration Converter
Convert pharmaceutical concentrations between % w/v, mg/mL, and mol/L using substance molecular weight presets.
Wind Chill Calculator
Determine the feels-like wind chill index from ambient air temperature and wind speed.
Depth ↔ Geostatic & Hydrostatic Pressure
Determine lithostatic (rock overburden) and hydrostatic (fluid) pressure at custom geological underground depths or deep underwater.
Gear ratio (input RPM ↔ output RPM ↔ torque)
Calculate gear ratios and convert input RPM and torque to output values based on compound single or double-stage tooth configurations.
Yarn Weight Converter
Convert yarn sizes across WPI (Wraps Per Inch), ply, and standard weight categories.
Muzzle velocity — fps ↔ m/s ↔ km/h
Convert velocities between fps, m/s, and km/h. Calculate muzzle kinetic energy in Joules and Foot-Pounds.
Drug & Supplement Dosage Converter
Convert supplement and drug dosing between milligrams (mg), micrograms (mcg), and International Units (IU) for vitamins A, C, D, and E.
Viscosity Converter
Convert dynamic and kinematic viscosity between centipoise (cP), centistoke (cSt), Saybolt Universal Seconds (SSU), Pa·s, and m²/s.
Tidal current ↔ drift
Calculate course to steer and speed over ground (or set and drift) to compensate for tidal current and wind leeway.
Legal Billable Hours Estimator
Convert word count of legal drafting documents to estimated billable hours based on complexity and billing rates.
IV Drip Rate (Drops/min ↔ mL/hour)
Convert IV flow rates between mL/hour and drops/minute (gtt/min) for any drop factor, with real-time dripping rate animation.
Conveyor speed (belt speed ↔ parts per minute)
Calculate conveyor belt linear velocity from pulley diameter and RPM, and estimate throughput in parts per minute based on spacing.
USCS Soil Classification Solver
Classify soil type under the Unified Soil Classification System (USCS) using sieve analysis and Atterberg limits.
Stone size ↔ carat estimator
Estimate carat weight of round, oval, emerald, pear, or marquise cut gemstones from their physical dimensions and specific gravity.