The open-standard utility suite for engineers, developers, and scientists. Perform verified conversions and calculations entirely in your browser. No server data transfer.
ISO 80000-3 standard area calculator. Instantly convert Square Meters, Acres, Hectares, Sq Feet & Yards with scientific precision. Free, private & accurate.
Precision length tool (ISO 80000-3). Convert Meters, Feet, Miles, Inches & Yards. Supports International vs US Survey Foot standards for maximum accuracy.
IEC 80000-13 standard storage tool. Distinguish Binary (KiB) from Decimal (KB). Convert Terabytes, Gigabytes & Megabytes accurately for IT professionals.
Convert energy units with ISO 80000-6 accuracy. Precise tool for Joules, Kilowatt-hours (kWh), BTUs & Calories. Distinguishes Thermochemical vs Steam values.
Engineering-grade force tool (ISO 80000-4). Calculate Newtons, Dynes, Kiloponds & Pound-force using standard gravity. Essential for structural physics.
ISO 80000-3 compliant frequency calculator. Convert Hertz, Revolutions Per Minute (RPM), kHz & Angular Velocity. Accurate for audio & signal processing.
Lab-quality mass calculator per ISO 80000-4. Convert Kilograms, Pounds, Ounces, Grams & Metric Tons. OIML compliant for trade, logistics & shipping.
Electrical & mechanical power tool (ISO 80000-6). Convert Watts, Horsepower, Kilowatts & BTUs/hr. IEEE standard algorithms for grid & engine analysis.
Hydraulic pressure calculator (ISO 80000-4). Convert Pascal, Bar, PSI, Atmospheres & Torr. Highly accurate for Gauge vs Absolute pressure calculations.
Avionics-grade velocity tool (ISO 80000-3). Convert Miles per Hour, KPH, Knots, Mach & Meters per Second. Accurate for maritime & aerospace navigation.
ITS-90 standard temperature tool. Convert Celsius, Fahrenheit, & Kelvin with thermodynamic precision. Scientific accuracy for lab research.
Atomic standard time tool (ISO 80000-3). Convert Seconds, Minutes, Days, Weeks & Julian Years. High-precision duration calculator for developers.
Chemical-grade volume tool. Convert Cubic Meters, US/UK Gallons, Liters, Cups & Fluid Ounces. Standardized for fluid logistics and culinary accuracy.
Finance & Developer Tools
Every feature designed with precision, privacy, and performance in mind.
Client-Side Execution. Your financial data and inputs never leave your browser context. Zero database logging.
Audited Accuracy. Calculations calibrated against NIST SP 811 and ISO standards. We don’t round off until you ask us to.
Instant Performance. Powered by WebAssembly. No page reloads. Works perfectly even when you are offline.