Density, Force and Pressure: Units That Need Care
A guide to common science and engineering calculations where units make or break the result.
Guide topic
Science and Engineering Calculator Guides
Guides for units, density, force, pressure, concentration, dilution, pH and practical science calculations.
Science and engineering calculations depend on units as much as formulas. A correct equation can still produce a poor answer if the input units are mixed or the measurement context is vague.
These articles check the logic behind common physics, chemistry and unit conversion calculations before the result is used for a real decision.
Science articles
Guides in this topic
Science and engineering guides for formulas where measurement details change the answer. Start here, then move through the numbered pages when the topic continues.
Concentration, Dilution and pH Calculations
How to think about molarity, dilution and pH when checking chemistry calculations.
Common Unit Conversion Mistakes and How to Avoid Them
How to avoid errors with length, weight, temperature, volume, density and pressure conversions.