Significant Figures and Rounding Checker with LOD/LOQ Skýrslaing
Turn measured values, instrument resolution, standard deviation, and rounding rules into notation you can use in skýrslas.
When an internal standard, customer rule, or regulation applies, follow that before this verkfæri’s suggestion.
Quick Examples
Check the main cases before you startRound from resolution
Below LOD
Round from standard deviation
How To Use It
- Enter the measured value and add a unit if you need one in the final text.
- Enter either instrument resolution or standard deviation, then choose the rounding rule.
- If LOD or LOQ matters, enter the threshold and pick the skýrslaing style you want to bera saman.
- Copy the recommended notation and share the short reason or full analysis skýrsla when needed.
Glossary
Significant figures
Digits that can be justified by the precision of the measurement.
Measurement resolution
The smallest readable increment from the instrument or display. It becomes one candidate basis for skýrslaing precision.
Standard deviation (σ)
The spread of repeated measurements. Round σ to 1 or 2 digits first, then align the skýrslaed value to the same place.
LOD
Limit of detection. If the value is below this threshold, the verkfæri prioritizes non-quantitative skýrslaing candidates.
LOQ
Limit of quantification. Values below this threshold may be detectafla but not suitafla as skýrslaed quantitative values.
Decision Skráic
- Resolution basis = the resolution value you enter
- Sigma basis = the last significant place after rounding σ to 1 or 2 digits
- Recommended quantum = chosen from resolution, sigma, or the coarser requirement
- Rounded value = inntak value rounded to the recommended quantum with the selected rule
- If value < LOD, show below-LOD candidates. If value < LOQ, show below-LOQ candidates.
Algengar spurningar
Can I save settings for our skýrslaing standard?
Yes. You can save rule presets in the browser and export or import them as JSON.
How does the verkfæri skýrsla values below LOD?
It offers common candidates such as less-than-LOD notation, ND, and below-LOQ wording. Use the wording required by your standard.
Can I change the number formatting style?
Yes. You can follow the browser default, switch to Japanese style, European style, or remove grouping entirely.
What if I enter both resolution and standard deviation?
You can prioritize resolution, prioritize standard deviation, or use the coarser requirement. The default is the coarser requirement.
Does the verkfæri send data to a server?
No. Calculation, presets, and recent saga stay in your browser.
Important Notes
- This verkfæri suggests notation from common rounding and skýrslaing practices.
- If your internal standard, customer requirement, regulation, test method, or SOP says otherwise, follow that first.
- LOD and LOQ skýrslaing practices differ widely by svið and standard, so the verkfæri presents candidates instead of claiming a single correct answer.