Converters Guides
Use this collection when you need to understand why a conversion works, whether a factor is exact, or why squared, cubed, offset, and reciprocal units need different treatment.
Unit conversion
Metric vs Imperial: Conversions and Examples
Compare metric, US customary and Imperial units with exact factors, diagrams and worked length, area, volume, mass and temperature examples.
Read guideMeasurement
Common Unit Conversions Guide
Learn common unit conversions for mass, temperature, speed and pressure with exact factors, worked examples and diagrams. Check your results with free tools.
Read guideDigital and time
Time and Data Conversion Guide
Learn time and data conversion with GB vs GiB examples, durations, Unix timestamps and DST diagrams. Follow worked steps and check results with free converters.
Read guideCooking
Kitchen Conversions Guide
Kitchen conversions explained: compare cup sizes, convert spoons and milliliters, estimate ingredient weights, and scale recipes. Try the cooking converter.
Read guideHow to choose a guide
Begin with common unit conversions for general factors, metric versus imperial for system context, kitchen conversions for ingredient measures, and time or data guides for non-decimal scales.
Editorial method and source
Conversion factors are stored in canonical units and checked in both directions. SI definitions are preferred where applicable, while contextual conversions state their assumptions.
BIPM SI BrochureWho maintains this page
Ownership and review
Written and maintained by the Toolarithm editorial team. No review date is shown without a maintained editorial record. No independent professional review is claimed.
Methodology
The editorial team checks definitions, examples, linked tools, and cited references. Dates shown here come from the page's maintained publication record.
Read the editorial methodologyDates and sources
Review dates change only after a substantive method or content check.