Wiskunde

Wiskundige en statistische rekenmachines

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Angle Converter

Convert between SI and historical plane-angle units (radian, milliradian, degree, gradian, turn, arcminute, arcsecond) anchored to the BIPM SI Brochure definition of the radian.

Engels

Area Converter

Convert between metric and imperial area units (square millimetre, square centimetre, square metre, hectare, square kilometre, square inch, square foot, square yard, acre, square mile) with NIST-grade exact factors.

Engels

Eenhedenomzetter

Convert between length, volume, area, temperature, pressure, energy, power, force, torque, and angle units with NIST-grade exact factors.

Engels

Energy Converter

Convert between SI, electrical, and thermal energy units (joule, kilojoule, megajoule, watt-hour, kilowatt-hour, thermochemical calorie, IT calorie, kilocalorie, BTU, US therm, electronvolt) with NIST-grade exact factors anchored to the 2019 SI redefinition.

Engels

Force Converter

Convert between SI, gravitational, and CGS force units (newton, kilonewton, dyne, kilogram-force, tonne-force, pound-force, ounce-force, short-ton-force) with NIST-grade exact factors anchored to CGPM 1901 standard gravity.

Indonesisch

IPK Calculator (Indonesia)

Calculate your Indonesian IPK (Indeks Prestasi Kumulatif) from course grades and SKS credits. Supports the Dikti grading system with predikat classifications (Cum Laude, Sangat Memuaskan, Memuaskan).

Engels

Length Converter

Convert between metric, imperial, and astronomical length units (millimetre, metre, kilometre, inch, foot, yard, mile, nautical mile, ångström, light-year, AU, parsec) with NIST-grade exact factors.

Maleis

Malaysian CGPA Calculator

Calculate your Malaysian CGPA on the 4.0 scale from course grades and credit hours. Matches the MOHE grading system used by Malaysian public and private universities.

Engels

Mass Converter

Convert mass between metric (kg, g, mg, tonne), avoirdupois (lb, oz, stone, short ton, long ton), troy ounce, grain, and the metric carat with NIST-grade exact factors.

Engels

Power Converter

Convert between SI and historical power units (watt, kilowatt, megawatt, mechanical horsepower, metric horsepower / PS, electric horsepower, BTU per hour, kilocalorie per hour, foot-pound per second). Disambiguates the three horsepower variants that vary by hundreds of watts.

Engels

Pressure Converter

Convert between SI, atmospheric, and gravitational pressure units (pascal, kilopascal, megapascal, bar, millibar, atmosphere, torr, mmHg, psi, kgf/cm², inH2O, cmH2O) with NIST-grade exact factors and conventional liquid-column values.

Engels

Procentcalculator

Bereken direct percentages: vind X % van een getal, hoeveel procent het ene getal is van het andere of de procentuele verandering tussen twee waarden.

Engels

Roman Numerals Converter

Convert numbers to Roman numerals and back, instantly. Bidirectional, with a place-value breakdown, a date-to-Roman tattoo mode, and support up to 3,999,999.

Engels

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur temperatures. Handles non-multiplicative scales correctly using the SI offset definition (0 °C = 273.15 K exactly, 13th CGPM 1967).

Thai

Thai GPA Calculator

Calculate your Thai GPA on the 4.0 scale from course grades and credits. Works for Thai university and secondary school students, including semester and cumulative GPA.

Engels

Time Converter

Convert time between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, fortnights, months, years, and decades. Exact SI factors, honest Julian month and year conventions.

Engels

Torque Converter

Convert between SI and imperial torque units (newton-metre, kilonewton-metre, kilogram-force metre, kilogram-force centimetre, pound-foot, pound-inch, ounce-inch) with NIST-grade exact factors anchored to CGPM 1901 standard gravity and the 1959 international yard and pound.

Engels

Volume Converter

Convert between metric, US customary, and UK imperial volume units (millilitre, cubic centimetre, litre, cubic metre, cubic inch, cubic foot, cubic yard, US fluid ounce, US pint, US gallon, UK pint, UK gallon) with NIST-grade exact factors.

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