Growing Medium VolumeHydroponics Lab
Calculate liters/gallons of clay pebbles, coco coir, or perlite needed for round or square pots.
Hydroponic root health depends on water temperature. Above 22°C (72°F), pythium pathogens thrive while oxygen levels drop. Keep reservoirs aerated and cool.
Explore Additional Utilities
CMYK ↔ Pantone Matcher
Approximate CMYK values to the closest solid Pantone matching system (PMS) color swatch.
Blowpipe rotation speed ↔ gravity sag correction
Determine optimal rotation speed (RPM) to keep glass centered and correct gravity sag based on viscosity states.
Grout coverage — tile size ↔ joint width → bags needed
Estimate dry grout requirements based on tile dimensions, joint width, joint depth, and overall surface area.
Script Character ↔ Word Counter
Analyze characters, spaces, punctuation, words, and word density. Convert text density predictions between CJK and Latin scripts.
Data Storage Units
Convert digital storage capacity sizes across bits, Bytes, MB, GB, and Terabytes.
Maritime & Aviation Speed
Convert maritime knots, airspeed parameters, and hourly nautical coordinates.
Tidal Rule of Twelfths Calculator
Estimate hourly tide heights and flow volumes between high and low tide periods using the standard maritime rule.
Refractive index ↔ critical angle — fiber optic design
Determine the boundary reflection critical angles and Fresnel reflection losses for Total Internal Reflection.
Carnot efficiency — hot ↔ cold temperature → max efficiency
Calculate the maximum theoretical thermal efficiency (Carnot Limit) of heat engines based on reservoir temperatures.
Beaufort Wind Force Scale
Convert wind speed units and classify storm conditions on the official Beaufort maritime wind power scale.
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.
Voltage Divider Designer
Calculate output voltage, resistor ratios, and locate standard E24 resistor values for divider networks.
Alcohol by Volume & Proof Converter
Convert between alcohol by volume (ABV), proof, and standard alcohol units for drinks and home brewing.
Shorthand speed — words per minute ↔ strokes
Analyze cursive shorthand writing velocities (Gregg, Pitman, Teeline) to compare stroke density limits and WPM targets.
Generator sizing — equipment load ↔ kVA needed
Estimate generator apparent power capacity requirements by summing dynamic equipment active and reactive loads.
Firewood volume — cords ↔ cubic meters ↔ cubic feet
Convert between cords, face cords, steres, and cubic volumes. Compute solid wood volumes, green or dry weight, and thermal BTU outputs.
BBQ Smoking Wood Quantity Calculator
Calculate the optimal quantity of smoking wood chunks or chips needed based on meat weight and type.
Angular Motor Rotation
Determine crankshaft engine RPM, radian ratios, and angular physical velocities.
Hijri ↔ Gregorian Calendar
Convert between Islamic Hijri calendar and standard Gregorian dates, with customized crescent visibility observation adjustments.
Water hardness — ppm ↔ grains per gallon ↔ mg/L
Convert brewing water hardness profiles between ppm, mg/L, Grains per Gallon (gpg), and German degrees (dGH).