What data format should I paste?

Paste one cycle count and crack length pair per line.

What does the slope represent?

The fitted slope is average crack growth per cycle over the entered interval.

Is Paris-law fitting included?

This version reports da/dN from length-cycle data and does not fit Paris-law constants.

ToolsConductScience tool

Crack GrowthFree in-browser calculator

Crack Growth Rate Calculator.

Summarize crack length versus cycle-count data for research and teaching examples. For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

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Validated2026-05-24

CitableMethods and citation included

Calculator

Results update in place

Try it out

Load example crack growth data to see the full workflow

Crack Growth inputs

Rows: cycles crack length mm

Results

Average da/dN

0.0000284 mm/cycle

Intercept crack length

1.096 mm

Slope x1e6

28.4

Final crack

2.35

from Cycles	to Cycles	da Mm	da Dn
0	10000	0.14	0.000014
10000	20000	0.21	0.000021
20000	30000	0.33	0.000033
30000	40000	0.47	0.000047

Review notes

Use conservative research-only language; specimen geometry and measurement uncertainty matter.

Methods note

Fits crack length against cycles and reports slope plus interval da/dN values.

Scope and limitations

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

Results are deterministic calculations from the values entered here. Review units, assumptions, and measurement quality before using outputs in reports or protocols.

Method

Uses the tool-specific formulas and assumptions shown in the calculator output.

Validated

Last validated 2026-05-24. Calculations are designed for planning and documentation support; verify procurement decisions against manufacturer specifications or institutional SOPs.

How to cite

How to Cite

Crack Growth Rate Calculator (1.2.0). ConductScience, Inc. 2026. Available at: https://conductscience.com/tools/crack-growth-rate-calculator

For materials research, education, and protocol documentation only. Not a certified inspection, compliance, asset-integrity, or final acceptance tool.

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