Ballistic Mils ↔ Angles
Convert between ballistics mils (NATO, Warsaw, Swedish), degrees, and MOA, with range estimation calculators.
Explore Additional Utilities
Thread length — stitch count ↔ thread needed
Calculate thread length needed for saddle stitching based on stitch line length, leather thickness, and spacing density.
Length Converter
Convert between meter, kilometer, centimeter, mile, yard, foot, inch, and more.
Cheese Yield & Rind Calculator
Estimate the edible cheese yield and rind weight waste for whole wheels and wedges of various cheese types.
Certificate validity — days ↔ expiry date calculation
Convert between certificate lifetime in days, months, or years, and calculate exact UTC expiration times with leap year support.
Planck units ↔ SI units — fundamental physics constants
Translate between SI physical units and the fundamental Planck natural units based on universal constants.
Ovulation & Fertility Calculator
Predict ovulation day, fertile window phases, and estimate conception probabilities.
ISO Week Number ↔ Calendar Date
Calculate ISO 8601 week numbers, week dates, and determine start/end weekdays of any given week year.
Battery capacity — Ah ↔ Wh ↔ days of autonomy
Convert between Amp-hours (Ah) and Watt-hours (Wh) and calculate battery bank backup days of autonomy based on loads.
Electricity Billing (kWh ↔ MJ)
Analyze electric billing kilowatt-hours and physical energy auditing megajoule metrics.
Essential oil dilution — drops ↔ % in carrier oil
Convert dilution percentages to drop counts and precise weights for facial, body, and therapeutic carrier oils.
Thermohaline density — temperature + salinity → seawater density
Determine seawater density and specific volume from water temperature and salinity using the UNESCO International Equation of State.
URL Encoder & Decoder
Safely encode illegal URL string sequences or decode clean string paths.
Mortar mix ratio — cement ↔ sand ↔ water by weight
Calculate standard masonry mortar mix classes (Type M, S, N, O, K) and determine precise cement, sand, and water weights.
ND Filter Stops Converter
Convert ND filter labels (ND density, optical density, and stop reduction) and calculate long exposure shutter speed compensation.
Dimensional Weight ↔ Chargeable Weight
Calculate shipping dimensional weight based on L x W x H using standard carrier factors, and determine final chargeable weight.
Explosive charge weight — rock volume ↔ kg of explosive
Estimate required explosives (kg, lbs) for blasting a rock volume using powder factor models for open-pit mining.
Weight Converter
Convert between kilogram, gram, pound, ounce, stone, and other mass units.
Radioactive Decay Half-Life
Estimate remaining isotope amounts and decay timelines from standard half-life periods.
Dovetail angle — ratio ↔ degrees for hardwood vs softwood
Convert dovetail joint slope ratios (e.g. 1:6, 1:8) to slope angles in degrees and verify hardwood/softwood suitability.
Shoe Size Converter
Convert footwear sizes across US, UK, Europe, and Japanese standards for men and women.