Ore Grade & Concentration Converter
Convert concentrations of valuable minerals across g/t, weight percentage (%), oz/ton, and ppm, plus compute total metal yield and recovery values.
Explore Additional Utilities
Thermohaline density — temperature + salinity → seawater density
Determine seawater density and specific volume from water temperature and salinity using the UNESCO International Equation of State.
Yarn Weight Converter
Convert yarn sizes across WPI (Wraps Per Inch), ply, and standard weight categories.
Coordinate converter — WGS84 ↔ local datum
Convert geographic coordinates between global WGS84 (GPS) and local datums, including UTM zone coordinate conversions.
Safety glass thickness ↔ impact resistance rating
Calculate safety glass thickness requirements and impact resistance (Tempered vs. Laminated).
Knitting Gauge Converter
Convert knitting and crochet stitches and rows count between centimeters and inches.
Gray ↔ rad (Absorbed Dose)
Convert between Gray (Gy), rad, milligray (mGy), and microrad (µrad) to analyze absorbed ionizing radiation energy per unit mass.
Wax yield — honey weight ↔ beeswax produced
Calculate estimated beeswax yields as a function of harvested honey comb or calculate honey consumption needed to build wax.
Pump Efficiency Calculator
Calculate pump efficiency and hydraulic power based on volumetric flow rate, head height, fluid density, and input shaft power.
Watch case size — mm diameter ↔ lug width
Analyze watch case diameter proportions, lug-to-lug spans, and find the corresponding standard strap lug-width sizes.
Scale factor (model size ↔ real world)
Convert dimensions between model design sizes and physical real-world scale targets, including imperial/metric conversions.
Sail area ↔ displacement ratio
Calculate Sail Area to Displacement Ratio (SADR) to evaluate a sailboat’s performance characteristics, speed potential, and light-wind capability.
Wind Chill Calculator
Determine the feels-like wind chill index from ambient air temperature and wind speed.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
Pediatric Dosing Calculator
Estimate pediatric dosages from adult recommendations using standard pediatric clinical rules: Clark's, Young's, Webster's, Fried's, and BSA methods.
Notarial Fee & Page Tier Calculator
Calculate official notary fees based on document page counts, copy requirements, travel, and custom tier structures.
Varroa mite load — alcohol wash count ↔ treatment threshold
Input alcohol wash or powdered sugar shake counts to analyze parasite load percentage and check treatment recommendations.
Stepper motor steps (degrees ↔ steps ↔ microsteps)
Convert between motor rotation angles in degrees, physical steps, and microsteps based on step angle and microstepping resolution.
Calorie burn — elevation gain + weight → energy needed
Estimate metabolic calorie consumption based on hiker weight, pack weight, trip duration, and elevation profile.
IBU ↔ bitterness ratio — hop bitterness vs malt sweetness
Calculate the BU:GU bitterness ratio by comparing hop Bitterness (IBU) against malt sweetness (Gravity Units).
Swimming Pace & Yardage Converter
Convert swim splits and paces between per-100m, per-100 yards, and overall distances with custom pool sizes.