Science & Maths

Calculadora de Equação do Segundo Grau

Solve ax squared plus bx plus c equals zero from the coefficients a, b, c: get the discriminant, its sign, and the real or complex roots instantly.

Science & Maths

Consulta da Tabela Periódica

Look up any of the 118 chemical elements by symbol, name, or atomic number: atomic mass, group, period, electron configuration, and category.

Science & Maths

Constantes Científicas

Search and browse over 20 fundamental physical constants with their exact CODATA value, SI unit, uncertainty, and a short description.

Science & Maths

Calculadora de Algarismos Significativos

Count the significant figures in any number and round the result of an addition, subtraction, multiplication, or division to the correct number of significant figures.

Science & Maths

Conversor de Unidades Físicas

Convert specialised physics units: energy (J, kcal, kWh, eV, BTU), pressure (bar, atm, psi, mmHg), force, power (hp vs CV), magnetic field, frequency, and electric charge.

Science & Maths

Conversor de Números Romanos

Convert whole numbers between 1 and 3999 to roman numerals and back, with live validation that flags non-standard notation such as IIII or VX.

Science & Maths

Calculadora de Matrizes

Calculate the determinant, inverse, transpose, sum, difference, or product of 2x2 and 3x3 matrices directly in your browser, with a clear message when a matrix cannot be inverted.