ND Filter Compensation
Convert between ND labels and calculate compensated exposure times for creative long exposure.
Base exposure of 1/125s scaled up by 1024x to compensate for glass density.
💡 Long Exposure Note: Extending your shutter speed from tiny fractions to seconds using ND filters lets you turn moving water, clouds, or crowds into ethereal, painterly mist.
Explore Additional Utilities
Magnetic Declination
Estimate compass alignment values and offset angles between magnetic north and true north.
Retention aid — filler % ↔ chemical dosage
Determine required dry retention aid chemical dosage and mineral filler weights based on dry pulp fiber mass.
Chlorophyll concentration ↔ water color index
Convert Chlorophyll-a bio-concentrations (mg/m³) to ocean water color classes, Forel-Ule index, and trophic status.
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.
Wind power density — wind speed ↔ watts per sq meter
Calculate available wind kinetic power density (W/m²) based on wind speed and localized air density characteristics.
Glaze specific gravity ↔ pint weight — glaze consistency
Convert glaze liquid specific gravities to US/Imperial pint weights and calculate suspended dry material volumes.
Alcohol by Volume & Proof Converter
Convert between alcohol by volume (ABV), proof, and standard alcohol units for drinks and home brewing.
Tidal Rule of Twelfths Calculator
Estimate hourly tide heights and flow volumes between high and low tide periods using the standard maritime rule.
Bread Dough Hydration Calculator
Convert between flour weight, water weight, and hydration percentages for perfect baking doughs.
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.
Salinity — PSU ↔ g/kg ↔ % — seawater concentration
Convert between Practical Salinity Units (PSU), salinity concentration in g/kg (ppt ‰), and percentage (%).
Text Case Converter
Swiftly switch text between UPPERCASE, lowercase, camelCase, snake_case, or Title Case.
Bohr radius ↔ nanometers — atomic scale reference
Determine electron orbital radius and binding energy levels for Hydrogen-like atomic configurations.
Fabric & Thread Density Calibrator
Analyze fabric weights, compare cotton single-ply thread counts, and calculate textile density.
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).
Coffee Brewing Ratio Calculator
Determine the perfect coffee-to-water brewing ratio based on grams of coffee, milliliters of water, and cup size.
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.
Glass thickness ↔ wind load — structural glazing
Calculate structural glass pane thickness required to withstand architectural wind load pressures.
Stocking density — fish size ↔ liters per kg
Calculate stocking density (kg/m³ or L/kg), total biomass, and maximum safe fish count based on tank volume and average fish weight.
Clay shrinkage — wet size ↔ fired size
Calculate wet, bone-dry, and kiln-fired pottery dimensions and analyze total contraction rates.