Experimental data & uncertainty Calculators
Paper 1B-friendly tools for rates, percentages, uncertainty, significant figures, dilution and calibration data.
Rate of change
Calculate average biological rate of change from two measurements and an elapsed time.
Open calculatorPercentage change & difference
Calculate signed percentage change or symmetric percentage difference between biological measurements.
Open calculatorPercentage uncertainty
Convert an absolute measurement uncertainty into percentage uncertainty and format the measurement.
Open calculatorSignificant figures
Round a value to a chosen number of significant figures and explain how zeros are treated.
Open calculatorDilution
Solve C₁V₁ = C₂V₂ for a simple laboratory dilution using any consistent concentration and volume units.
Open calculatorSerial dilution
Calculate concentrations through repeated equal-factor serial dilution steps.
Open calculatorCalibration curve
Fit a linear calibration curve, report R² and estimate an unknown biological sample from its response.
Open calculator