Optics & Vision Lab
Analyze lens focal lengths, convert clinical visual acuity fractions, compute prism deviations, simulate color temperatures, and evaluate light bulb efficacy.
Color Temperature ↔ Blackbody Color
Convert color temperature in Kelvin to Mireds, with descriptive lighting labels, and a live color simulation of blackbody radiation.
#ffb87bExcellent color clarity. Commonly used for classical portraits and gallery lighting.
Explore Additional Utilities
Hold size ↔ finger force — crimp load estimation
Estimate skeletal finger force and crimp tendon pulley loads (A2/A4) based on edge/hold size (mm) and climber weight.
Yeast pitch rate — batch volume + gravity → grams of yeast
Determine required yeast cell counts and dry yeast weight based on batch volume, wort gravity, and target pitch rates.
Heat Index Feels-Like
Assess felt air heat indexes using ambient temperature and relative humidity thresholds.
Mortar mix ratio — cement ↔ sand ↔ water by weight
Calculate standard masonry mortar mix classes (Type M, S, N, O, K) and determine precise cement, sand, and water weights.
Maritime & Aviation Speed
Convert maritime knots, airspeed parameters, and hourly nautical coordinates.
No Claim Discount (NCD)
Track and project No Claim Discount percentages, claim-free year scales, and calculate potential premium savings with claim step-backs.
Navy Body Fat Estimator
Estimate body fat percentage using standard US Navy circumference measurements.
Electrode size ↔ amperage range — stick welding
Match stick electrode sizes (3/32", 1/8", 5/32") and classes (E7018, E6010, E6013) with optimal welding amperage ranges.
Base64 ↔ hex ↔ binary — encoding format converter
Convert raw text strings or bytes bidirectionally between Base64, Hexadecimal, Binary, and standard ASCII formats.
AWG Cable Sizer
Convert American Wire Gauge (AWG) sizes to metric dimensions, and estimate current carrying capacity.
Flash Guide Number Calculator
Solve the photography flash equation to find guide numbers, aperture, subject distance, or ISO speed for perfect manual flash exposures.
Ore dilution — grade ↔ waste ↔ recovered grade
Calculate recovered ore grade, tonnage adjustments, dilution percentages, and mining waste contamination levels.
Base Number Converter
Convert raw numbers seamlessly between Binary, Octal, Decimal, and Hexadecimal formats with active bit layouts.
Semitones & Pitch Intervals
Convert pitch ratios to semitones and cents, and calculate frequency intervals.
Envelope size — letter size ↔ envelope dimensions needed
Match standard paper formats and fold styles to commercial envelope dimensions with proper clearance parameters.
Percentile ↔ z-score ↔ standard deviation
Determine z-scores, percentiles, standard deviation steps, and probability density for standard normal distribution curves.
Gelatin & Agar Agar Converter
Convert between gelatin sheets (platinum, gold, silver, bronze), powdered gelatin, and vegan agar agar.
Ballistic Mils ↔ Angles
Convert between ballistics mils (NATO, Warsaw, Swedish), degrees, and MOA, with range estimation calculators.
Audio Dynamic Range Calculator
Estimate dynamic range in decibels (dB) and quantization levels for any bit depth.
Concrete Mix Ratio Calculator
Calculate volume ratios, cement bags, sand, gravel, and water quantities for standard concrete grades.