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
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.
True wind ↔ apparent wind
Calculate apparent wind speed and angle from true wind speed, sailing angle, and boat speed (or vice versa).
Gelatin & Agar Agar Converter
Convert between gelatin sheets (platinum, gold, silver, bronze), powdered gelatin, and vegan agar agar.
Stride length ↔ cadence ↔ running speed
Analyze running biomechanics: calculate speed based on cadence (SPM) and stride length.
CFM ↔ m³/hour — air flow for ventilation
Convert ventilation air flow rates and reference standard design volumes for common room types and equipment hoods.
Speech Rate (WPM ↔ Pages)
Calculate presentation speech times, audio length, and page count equivalents using custom words per minute (WPM).
pH Acid/Base Index
Evaluate hydrogen ion concentrations and check acidic or alkaline levels using pH logarithmic scales.
ISO Week Number ↔ Calendar Date
Calculate ISO 8601 week numbers, week dates, and determine start/end weekdays of any given week year.
Tree diameter ↔ basal area — forestry measurement
Convert tree breast height diameters to single tree basal area or estimate stand basal area densities per acre or hectare.
URL Slug Generator
Generate clean, hyphenated, SEO-friendly slugs from any string with custom separators.
Maritime & Aviation Speed
Convert maritime knots, airspeed parameters, and hourly nautical coordinates.
Effect size — Cohen's d ↔ r ↔ odds ratio
Convert between various effect size measures like Cohen's d, Pearson correlation r, and Odds Ratio for scientific research interpretation.
Carbon sequestration — tree species + size → kg CO2 stored
Estimate total green weight, dry organic biomass, carbon mass, and cumulative CO2 equivalent sequestered by an individual tree.
Grout coverage — tile size ↔ joint width → bags needed
Estimate dry grout requirements based on tile dimensions, joint width, joint depth, and overall surface area.
Wire feed speed ↔ amperage — MIG welding settings
Calculate MIG wire feed speed (WFS) and matching amperage. Includes gas recommendations and presets for steel, stainless, and aluminum.
Seed Sowing Rate Estimator
Calculate seed sowing rates based on target populations, thousand-kernel weight (TKW), and field survival ratios.
Drain slope — mm per meter ↔ inches per foot
Convert drainage slope units and calculate vertical height drops across horizontal sewage pipes run lengths.
Script Character ↔ Word Counter
Analyze characters, spaces, punctuation, words, and word density. Convert text density predictions between CJK and Latin scripts.
CIDR notation ↔ subnet mask ↔ host count
Calculate subnet masks, wildcard masks, host counts, and subnet parameters from CIDR prefixes or custom subnet masks.
Wave height ↔ wave period — sea state description
Assess Significant Wave Height, period, WMO sea states, wave wavelength, celerity speed, and steepness limits.