Halbwertszeit-Rechner

Use the free online Halbwertszeit-Rechner tool. Fast, private and easy to use — runs entirely in your browser. Part of our Chemie-Rechner collection.

Molaritäts-Rechner

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

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

Verdünnungs-Rechner

Stock concentration C1 Target concentration C2 Final volume V2

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

pH-Rechner

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

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

Ideales-Gasgesetz-Rechner

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.

Gramm-zu-Mol-Umrechner

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

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

Kombiniertes-Gasgesetz-Rechner

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.

Halbwertszeit-Rechner

Initial amount Half-life Elapsed time (same unit)

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

Lösungsprozent-Rechner

Solute mass (g) Solution volume (mL)

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

Häufig gestellte Fragen

Is the Halbwertszeit-Rechner free to use?

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

Is the Halbwertszeit-Rechner safe and private?

Absolutely. The Halbwertszeit-Rechner 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 Halbwertszeit-Rechner?

No installation is needed. The Halbwertszeit-Rechner works instantly online in any modern browser on desktop, tablet or mobile.

Does the Halbwertszeit-Rechner work on mobile phones?

Yes. The Halbwertszeit-Rechner is fully responsive and works smoothly on iPhone, Android and any other device.