Weight Converter
Convert between kilogram, gram, pound, ounce, stone, and other mass units.
1 = 1
Explore Additional Utilities
Water resistance — ATM ↔ bar ↔ meters depth rating
Convert water pressure tolerances across ATM, Bar, and depth meters. Understand safe real-world water sport activities.
Blanket size — horse length ↔ rug size in inches/cm
Calculate horse blanket (rug) sizing from point of shoulder to center of tail measurements in inches, centimeters, and UK/EU sizes.
Sievert ↔ rem (Dose Equivalent)
Convert between Sieverts (Sv), rem, millisieverts (mSv), and millirem (mrem) to quantify biological effects and occupational radiation risk.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
Stellar Magnitude Converter
Calculate apparent vs. absolute magnitudes of stars and estimate their physical distance.
Visual Acuity Converter
Convert visual acuity measurements between Snellen US (20/20), Snellen Metric (6/6), decimal, LogMAR, and Percentage systems.
Brood frame count ↔ colony population estimate
Convert frame counts of capped brood to estimate total emerging colony population and overall workforce strength.
Visible light transmittance ↔ tint level
Calculate Visible Light Transmittance (VLT) performance ratios and visual interior glare profiles.
Fabric Width Yardage Converter
Convert fabric yardage requirements between different standard widths like 44 inches and 60 inches.
Soil Compaction Ratio Calculator
Calculate and convert soil compaction ratio, loose volume, compacted volume, and shrink/swell factor for cut-and-fill operations.
Brick Count Estimator
Calculate bricks, mortar volume, sand, and cement needed for masonry walls.
Swimming Pace & Yardage Converter
Convert swim splits and paces between per-100m, per-100 yards, and overall distances with custom pool sizes.
Ore Grade & Concentration Converter
Convert mineral grade concentrations between grams per ton (g/t), weight percentage (%), troy ounces per ton (oz/st), and ppm.
Ballistic coefficient ↔ drag — projectile performance
Calculate bullet Sectional Density (SD) and Ballistic Coefficient (BC) using projectile weight, caliber, and form factor.
Tree diameter ↔ basal area — forestry measurement
Convert tree breast height diameters to single tree basal area or estimate stand basal area densities per acre or hectare.
Stone size ↔ carat estimator
Estimate carat weight of round, oval, emerald, pear, or marquise cut gemstones from their physical dimensions and specific gravity.
Sound Pressure Level (SPL) Converter
Convert sound pressure from Pascals (Pa) to decibels (dB SPL) and calculate distance attenuation or sound level summing.
Sidereal Time Converter
Convert between standard Solar Time and Sidereal Time based on your longitude.
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).
Drug Concentration Converter
Convert pharmaceutical concentrations between % w/v, mg/mL, and mol/L using substance molecular weight presets.