Geological mass loss on ignition calculator

Calculate observed mass loss and initial sample mass with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use observed mass loss and initial sample mass to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Empty crucible mass (g)
30
Crucible plus dry sample mass (g)
35
Crucible plus heated sample mass (g)
34.5
Observed mass loss (%)
10
Initial sample mass (g)
5
Residue mass (g)
4.5

Try another scenario

Empty crucible mass (g)
33
Crucible plus dry sample mass (g)
35
Crucible plus heated sample mass (g)
34.5
Observed mass loss (%)
25
Initial sample mass (g)
2
Residue mass (g)
1.5
Calculation method

Calculation method

Observed mass loss (%)

100(before−after)/(before−crucible).

Initial sample mass (g)

Before−crucible.

Residue mass (g)

After−crucible; negative loss indicates mass gain.

Symbols and units
a
Empty crucible mass (g)
b
Crucible plus dry sample mass (g)
c
Crucible plus heated sample mass (g)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Crucible and sample masses, heating stage. Returns Observed mass-loss percentage. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Empty crucible mass (g): minimum 1e-12, maximum 1000000000000.0. Crucible plus dry sample mass (g): minimum 1e-12, maximum 1000000000000.0. Crucible plus heated sample mass (g): minimum 1e-12, maximum 1000000000000.0.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Share this page
Share this calculator

Leave unchecked to share the page without your entered values.