Supplement & Drug Dosage Converter
Convert supplement and drug dosing between milligrams (mg), micrograms (mcg), and International Units (IU) based on specific substances.
International Units (IU) are used to measure the biological effect of fat-soluble vitamins (A, D, E) and certain hormones, rather than physical mass.
Vitamin D3: 1 mcg is exactly 40 IU. Thus, 50 mcg (or 0.05 mg) represents 2000 IU, a standard daily nutritional value.
Vitamin E Natural vs. Synthetic: Natural (d-alpha-tocopherol) has higher biological potency per milligram than synthetic (dl-alpha-tocopherol), requiring fewer mg to reach the same IU value.
Explore Additional Utilities
Cadence ↔ speed — gear ratio + RPM → km/h
Determine speed based on cadence (RPM), chainring/cog teeth counts, and tire circumference.
Brood frame count ↔ colony population estimate
Convert frame counts of capped brood to estimate total emerging colony population and overall workforce strength.
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.
Precipitation Unit Converter
Convert rainfall and precipitation depth between millimeters, inches, and liters per square meter.
USCS Soil Classification Solver
Classify soil type under the Unified Soil Classification System (USCS) using sieve analysis and Atterberg limits.
Cloud Base Height Estimator
Estimate cloud condensation levels and cloud base height based on temperature and dewpoint spreads.
Cure time — soap thickness ↔ days to harden
Forecast recommended bar cure durations and hardening rates based on shape profile dimensions.
Stone size ↔ carat estimator
Estimate carat weight of round, oval, emerald, pear, or marquise cut gemstones from their physical dimensions and specific gravity.
Leather weight — oz ↔ mm thickness
Convert leather weights in ounces to exact millimeter or fractional inch thickness. View target usage categories.
Carat weight ↔ grams
Convert between diamond or gemstone carats, metric grams, grains, and points of gem weight.
Safety glass thickness ↔ impact resistance rating
Calculate safety glass thickness requirements and impact resistance (Tempered vs. Laminated).
U-value ↔ thermal performance — double vs triple glazing
Analyze thermal conductivity (U-values and R-values) for energy-efficient glazing window performance.
Reynolds Number Simulator
Determine fluid flow regimes (laminar, transitional, or turbulent) by calculating the dimensionless Reynolds number from velocity, diameter, and viscosity.
Plying angle ↔ yarn strength — twist balance
Calculate optimal twist plying angles, yarn twist multipliers, and balance criteria to spin stable structured yarns.
Mohs Hardness & Scratch Resistance
Compare minerals, absolute hardness values, and scratch interactions using the classic 1-10 Mohs scale and Knoop indentation hardness.
Encoder resolution (PPR ↔ degrees per pulse)
Convert between encoder Pulses Per Revolution (PPR), Cycles Per Revolution (CPR), and angular resolution down to arcseconds.
Yeast Equivalents Calculator
Calibrate biological yeast weights and convert between fresh, active dry, and instant yeasts.
DPI / PPI Converter
Convert image pixel dimensions into physical print sizes (inches/cm) at any target resolution.
Foreign Exchange Cross Rates
Compare conversion values and custom exchange indicators across popular global currencies.
Ovulation & Fertility Calculator
Predict ovulation day, fertile window phases, and estimate conception probabilities.