Calculadora de Meia-Vida

Use the free online Calculadora de Meia-Vida tool. Fast, private and easy to use — runs entirely in your browser. Part of our Calculadoras de Química collection.

Calculadora de Molaridade

Solute mass (g) Molar mass (g/mol) Solution volume (L)

Find the molar concentration of a solution from solute mass, molar mass and volume.

Calculadora de Diluição

Stock concentration C1 Target concentration C2 Final volume V2

Use C1V1 = C2V2 to find how much stock solution and diluent a dilution needs.

Calculadora de pH

[H+] concentration (mol/L) or pH (leave [H+] blank)

Convert between hydrogen-ion concentration, pH and pOH in both directions.

Calculadora da Lei dos Gases Ideais

Pressure P (atm) Volume V (L) — leave blank to solve Moles n Temperature T (K)

Solve PV = nRT for the missing variable using R = 0.082057 L·atm/mol·K.

Conversor de Gramas para Mols

Molar mass (g/mol) Mass (g) or Moles (leave mass blank)

Convert between grams and moles of any substance using its molar mass.

Calculadora da Lei Combinada dos Gases

Initial pressure P1 Initial volume V1 Initial temperature T1 (K) Final volume V2 (or leave blank) Final pressure P2 (or leave blank) Final temperature T2 (K)

Apply P1V1/T1 = P2V2/T2 to find the final pressure or volume of a gas.

Calculadora de Meia-Vida

Initial amount Half-life Elapsed time (same unit)

Find how much of a decaying substance remains after any elapsed time.

Calculadora de Percentagem de Solução

Solute mass (g) Solution volume (mL)

Express a solution strength as % w/v and grams per litre.

Perguntas Frequentes

Is the Calculadora de Meia-Vida free to use?

Yes. The Calculadora de Meia-Vida is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the Calculadora de Meia-Vida safe and private?

Absolutely. The Calculadora de Meia-Vida runs entirely in your browser, so your data never leaves your device and nothing is uploaded to a server.

Do I need to install anything to use the Calculadora de Meia-Vida?

No installation is needed. The Calculadora de Meia-Vida works instantly online in any modern browser on desktop, tablet or mobile.

Does the Calculadora de Meia-Vida work on mobile phones?

Yes. The Calculadora de Meia-Vida is fully responsive and works smoothly on iPhone, Android and any other device.