Calibration Curve Calculator
Calibration curve calculator
Estimate concentration from linear response y = mx + b.
InputsChemistry3 fieldsLive
Result
1.4 concentration units
Uses x = (y - b)/m.
Live update
Chem signal
Advanced options
Formula
y = mx + b so x = (y - b)/m Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
y | Measured instrument signal | instrument units | |
m | Calibration slope | signal/concentration | |
b | Calibration intercept | signal units | |
x | Calculated concentration | concentration units |
- Use signal value y from sample measurement.
- Use slope m and intercept b from calibration line.
- Rearrange linear equation to solve x concentration.
Example
Worked example: y = 0.75, m = 0.50, b = 0.05
- 1 x = (y - b)/m
- 2 x = (0.75 - 0.05)/0.50
- 3 x = 1.40
Calculated concentration is 1.40 (in calibration units).
How
- Enter measured signal y.
- Enter calibration slope m and intercept b.
- Read estimated concentration x.
Avoid
- Entering slope with wrong sign.
- Forgetting to subtract intercept before division.
- Using a non-linear method with this linear calculator.
Ref only. Verify values. Follow lab safety.
FAQ
What if slope is zero?
A zero slope means no calibration sensitivity; concentration cannot be solved by this form.
Can I use this for negative intercept values?
Yes, as long as slope is non-zero and values are meaningful for your method.
Does this tool fit a calibration line?
No, it assumes slope and intercept are already known.
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