Strain Gauge Calculator
Strain from resistance change via gauge factor — and what stress that means.
1,000 µε changes 120 Ω by just 0.24 Ω — hence Wheatstone bridges and why lead-wire resistance must be balanced out. Temperature drift fakes strain; use dummy gauges.
Formula
Strain Gauge Calculator is a free strain gauge for design engineers, metallurgists and QA inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Strain Gauge Calculator
Strain from resistance change via gauge factor — and what stress that means. The calculation implements ε = (ΔR/R)/GF; σ = E·ε (Micro-Measurements TN-505; experimental stress analysis). 1,000 µε changes 120 Ω by just 0.24 Ω — hence Wheatstone bridges and why lead-wire resistance must be balanced out. Temperature drift fakes strain; use dummy gauges.
How to use Strain Gauge Calculator
- 1Enter Resistance change ΔR in Ω.
- 2Enter Gauge resistance R in Ω (120 or 350 Ω standard).
- 3Enter Gauge factor.
- 4Enter Material E in GPa.
- 5Read Strain, Implied stress (uniaxial) instantly — no submit button needed.
Why use Strain Gauge Calculator?
- ✓Implements the standard formula — ε = (ΔR/R)/GF; σ = E·ε
- ✓Reference cited on-page: Micro-Measurements TN-505; experimental stress analysis
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Strain Gauge Calculator use?+
It computes ε = (ΔR/R)/GF; σ = E·ε, per Micro-Measurements TN-505; experimental stress analysis. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
1,000 µε changes 120 Ω by just 0.24 Ω — hence Wheatstone bridges and why lead-wire resistance must be balanced out. Temperature drift fakes strain; use dummy gauges.
Where do the material property defaults come from?+
Defaults are standard handbook values (ASM, manufacturer datasheets, the cited standard). Always substitute certified values from your material's test certificate for critical work.
Is the Strain Gauge Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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