Navy Body Fat Estimator
Estimate body fat percentage using standard US Navy circumference measurements.
Explore Additional Utilities
Trim speed ↔ bar pressure — speed system calibration
Calibrate speedbar travel, resulting airspeed increase, and required bar pressure.
Species-Specific Drug Dosing
Calculate animal weight-based dosages, target mg requirements, and liquid volumes across different species: dogs, cats, horses, cattle, and rabbits.
Lye calculator — oil weight ↔ NaOH ↔ KOH amount
Determine exact NaOH and KOH weights required for cold and hot-process soap formulation batches.
Soil Permeability Converter
Convert coefficient of permeability (hydraulic conductivity) between cm/s, m/day, ft/day, and m/s with soil type drainage classifications.
Saponification value — oil type ↔ lye required per gram
Look up sap values for standard oils and calculate custom lye weights.
Heel angle ↔ righting moment
Calculate heel angle, righting arm (GZ), righting moment, and sailboat stability from displacement, vertical center of gravity, and wind force.
Coordinate converter — WGS84 ↔ local datum
Convert geographic coordinates between global WGS84 (GPS) and local datums, including UTM zone coordinate conversions.
Gather weight ↔ finished piece size estimate
Convert molten glass gather weight to finished dry piece volume and dimensions (hollow spheres, cylinders, bowls) based on thickness.
Colony weight gain — nectar flow ↔ kg per day estimate
Estimate the daily hive weight gain from raw floral nectar inflow and final cured honey production.
Pattern scaling — original size ↔ scaled dimensions
Scale sewing and cutting patterns up or down uniformly. Convert dimensions between source and target sizes.
Cabochon dome height ↔ base diameter ratio
Calculate cabochon dome proportions, bezel edge thickness, and curvature radii based on base shapes.
Livestock Live Weight ↔ Carcass Yield
Estimate hot carcass weight (HCW), dressing percentage, and final retail cut take-home meat yield for beef, pork, lamb, and goat.
Wick size ↔ container diameter — burn pool coverage
Find recommended wick sizes based on container diameter, wax type, and burn pool coverage guidelines.
Denim Weight Converter
Convert denim fabric weight between ounces per square yard (oz/yd²) and grams per square meter (gsm) with fabric weight classifications.
Form size — body measurement ↔ mannikin dimensions
Convert carcass or fresh animal field measurements (A, B, C, D) to standard taxidermy mannikin/form sizes.
Troy ounce ↔ gram ↔ pennyweight
Convert weights of precious metals like gold, silver, and platinum between Troy ounces, grams, and pennyweight (dwt).
Crown position ↔ function — hand setting vs winding
Map out the mechanical state and winding functions of crowns at positions 0, 1, and 2, including quickset dates and hacking.
Light intensity — PPFD ↔ lux ↔ watts per sq meter
Convert between Photosynthetic Photon Flux Density (PPFD/PAR), illuminance (Lux/Foot-candles), and grow light wattage requirements.
Pump Efficiency Calculator
Calculate pump efficiency and hydraulic power based on volumetric flow rate, head height, fluid density, and input shaft power.
Gas mix — O2 % ↔ depth limit — MOD calculation
Calculate the Maximum Operating Depth (MOD) and partial pressure of oxygen (PPO2) for nitrox and air diving.