Experimental data & uncertainty Calculators
Paper 1B-friendly tools for calibration curves, uncertainty, significant figures and comparison of experimental values.
Calibration curve
Fit a linear calibration curve, report slope, intercept and R², and calculate an unknown concentration from its response.
Open calculatorPercentage uncertainty
Convert an absolute measurement uncertainty to percentage uncertainty and report a rounded x ± Δx result.
Open calculatorUncertainty propagation
Propagate school-lab uncertainties through addition, subtraction, multiplication and division; power propagation is clearly marked HL-only.
Open calculatorSignificant figures
Round a decimal or scientific-notation value to a chosen number of significant figures and explain which zeros carry meaning.
Open calculatorError & difference
Calculate percentage error against a reference, percentage difference between two measurements, or signed percentage change.
Open calculator