Lumens & Bulb Wattage Equivalence
Compare light outputs in lumens with electrical consumption in bulb watts.
Explore Additional Utilities
Color Code Converter
Instantly convert between HEX, RGB, HSL, and CMYK color spaces with a visual real-time preview and slider inputs.
Conveyor speed (belt speed ↔ parts per minute)
Calculate conveyor belt linear velocity from pulley diameter and RPM, and estimate throughput in parts per minute based on spacing.
Saddle fit — tree width ↔ horse back angle & measurement
Determine tree width (Narrow, Medium, Wide, Extra Wide) from wither angle measurements and back curvature.
Muzzle velocity — fps ↔ m/s ↔ km/h
Convert velocities between fps, m/s, and km/h. Calculate muzzle kinetic energy in Joules and Foot-Pounds.
Animal Feed & Dry Matter Calculator
Convert animal body weight percentage dry matter intake (DMI) to daily feed requirements in kg/lbs, based on feed dry matter ratio and species presets.
Stone size ↔ carat estimator
Estimate carat weight of round, oval, emerald, pear, or marquise cut gemstones from their physical dimensions and specific gravity.
Fabric Width Yardage Converter
Convert fabric yardage requirements between different standard widths like 44 inches and 60 inches.
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.
Lye calculator — oil weight ↔ NaOH ↔ KOH amount
Determine exact NaOH and KOH weights required for cold and hot-process soap formulation batches.
Watch beat rate — BPH ↔ Hz ↔ vibrations per hour
Convert mechanical watch balance wheel frequencies between Beats Per Hour (BPH), Vibrations Per Hour, and Hertz (Hz).
Wind Chill Calculator
Determine the feels-like wind chill index from ambient air temperature and wind speed.
Drug Half-Life & Scheduling
Model drug half-life elimination, dosing accumulation ratios, times to steady-state, and clearance curves with interactive charts.
Layer height ↔ print time estimator
Estimate 3D print duration changes and total layer counts when switching layer heights and print speeds.
Octave Band Converter
Calculate center frequencies, upper/lower band limits, and bandwidths for fractional octave bands (1/1, 1/3 octaves).
IV Drip Rate (Drops/min ↔ mL/hour)
Convert IV flow rates between mL/hour and drops/minute (gtt/min) for any drop factor, with real-time dripping rate animation.
Bullet drop — distance ↔ inches ↔ cm at given range
Estimate bullet drop trajectories over distance based on muzzle velocity, projectile mass, and gravitational pull.
Fold ratio — paper thickness ↔ maximum folds possible
Compute theoretical limit of fold iterations possible for paper size and thickness (Britney Gallivan equation).
Precipitation Unit Converter
Convert rainfall and precipitation depth between millimeters, inches, and liters per square meter.
Wind Turbine Power Generator
Estimate power output (watts) of a wind turbine based on wind speed, rotor diameter, blade sweep area, and aerodynamic power coefficients.
Brick Count Estimator
Calculate bricks, mortar volume, sand, and cement needed for masonry walls.