Scuba Diving & Gas Calculator
Gas mixture depths, air consumption rates, decompression stops, weighting limits, and visibility clarity indices.
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GPS Format Converter
Convert global latitude and longitude between Decimal Degrees (DD) and Degrees Minutes Seconds (DMS).
Hallmark converter (UK date letters ↔ year)
Decode historic and modern UK silver, gold, and platinum hallmarks, converting assay office date letters to exact production years.
Nautical Distance & Speed Sizer
Convert distances between nautical miles, statute miles, and kilometers, and calculate knot-based speeds.
Heat Index Feels-Like
Assess felt air heat indexes using ambient temperature and relative humidity thresholds.
Thermal conductivity — W/m·K ↔ BTU·in/hr·ft²·°F
Translate thermal conductivity values between W/m·K, BTU·in/hr·ft²·°F, and other units.
JSON Formatter
Format, validate, beautify, and minify your JSON data structures in real-time.
Lumens & Bulb Wattage Equivalence
Compare light outputs in lumens with electrical consumption in bulb watts.
RAID capacity — disk count + size + type → usable space
Calculate usable capacity, parity overhead, and fault tolerance strategies for RAID 0, 1, 5, 6, and 10.
Angular Motor Rotation
Determine crankshaft engine RPM, radian ratios, and angular physical velocities.
Nutritional Energy (kcal ↔ kJ)
Convert food nutritional calories and physical kilojoules standard label indexes.
Gemstone rough weight ↔ finished carat yield
Estimate finished faceted carat weight and material yield percentages of raw gemstone rough.
Chemical Solutions Concentration
Convert chemical solutions concentration (Molarity ↔ Molality ↔ PPM) and analyze mass ratios.
Camber angle — mm of offset ↔ degrees
Convert alignment offset deflection in millimeters to degrees of camber angle based on rim diameter, or vice versa.
Sheet basis weight — gsm ↔ finished sheet thickness
Convert sheet basis weight to finished sheet caliper thickness based on structural pulp densities.
Network Bandwidth Rates
Compare network bandwidth speed rates across Mbps, Megabytes, and hourly rates.
Quench rate — steel grade ↔ medium — oil vs water vs air
Identify ideal quench mediums and tempering guidelines for hardening various carbon and alloy steel grades.
Cabochon dome height ↔ base diameter ratio
Calculate cabochon dome proportions, bezel edge thickness, and curvature radii based on base shapes.
Mechanical Power (W ↔ hp)
Convert physical engine horsepower ratings, mechanical draft forces, and electric wattages.
Responsive Font Units Converter
Compute points, pixels, em, rem web font guidelines, and equivalent font sizes.
Stone size ↔ carat estimator
Estimate carat weight of round, oval, emerald, pear, or marquise cut gemstones from their physical dimensions and specific gravity.