Learning tools

Science calculators and review tools

Simple arithmetic tools that connect formulas to concepts. They are educational—not engineering, laboratory or medical calculators.

Science-claim checklist

The claim is stated precisely. The evidence actually measures the claimed effect. Comparison or control conditions are clear. Uncertainty and sample size are considered. Correlation is not automatically called causation. One study is not treated as permanent consensus.

Science calculators and review tools

Speed from distance and time

Density calculator

Light wavelength → frequency

Temperature converter

SI prefix converter

Science-claim checklist