# ConversionCalculator.net > Free online unit converter organized into 3 hubs covering 19 categories, plus guides and explainers on measurement systems. Every conversion factor sourced from NIST SP 811, Appendix B (or BIPM SI Brochure / IEC 60027-2 / UK Weights and Measures Act where applicable). ## Hubs - Everyday & Kitchen: https://conversioncalculator.net/everyday-kitchen-hub.html - Speed, Time & Navigation: https://conversioncalculator.net/speed-time-navigation-hub.html - Science & Engineering: https://conversioncalculator.net/science-engineering-hub.html ## Categories - Length: https://conversioncalculator.net/length-converter.html - Weight & Mass: https://conversioncalculator.net/weight-mass-converter.html - Temperature: https://conversioncalculator.net/temperature-converter.html - Volume: https://conversioncalculator.net/volume-converter.html - Speed: https://conversioncalculator.net/speed-converter.html - Area: https://conversioncalculator.net/area-converter.html - Time: https://conversioncalculator.net/time-converter.html - Data Storage: https://conversioncalculator.net/data-storage-converter.html - Cooking & Baking: https://conversioncalculator.net/cooking-baking-converter.html - Pressure: https://conversioncalculator.net/pressure-converter.html - Power: https://conversioncalculator.net/power-converter.html - Energy: https://conversioncalculator.net/energy-converter.html - Angle: https://conversioncalculator.net/angle-converter.html - Force: https://conversioncalculator.net/force-converter.html - Frequency: https://conversioncalculator.net/frequency-converter.html - Torque: https://conversioncalculator.net/torque-converter.html - Density: https://conversioncalculator.net/density-converter.html - Flow Rate: https://conversioncalculator.net/flow-rate-converter.html - Illuminance: https://conversioncalculator.net/illuminance-converter.html ## Articles - Metric vs Imperial: The Complete Practical Guide to Both Measurement Systems: https://conversioncalculator.net/articles/metric-vs-imperial-guide.html - How Temperature Scales Work: Celsius, Fahrenheit, and Kelvin Explained: https://conversioncalculator.net/articles/how-temperature-scales-work.html - Nautical and Aviation Units: Knots, Nautical Miles, and Why They're Different: https://conversioncalculator.net/articles/nautical-aviation-units-explained.html - Common Unit Conversion Mistakes and How to Avoid Them: https://conversioncalculator.net/articles/common-unit-conversion-mistakes.html - Kitchen Measurement Conversions: A Cook's Guide to Metric and US Customary: https://conversioncalculator.net/articles/kitchen-measurement-conversions-guide.html - US Customary vs UK Imperial: Where the Two Systems Actually Differ: https://conversioncalculator.net/articles/us-customary-vs-uk-imperial.html - A Woodworker's Guide to Reading a Tape Measure in Metric and Imperial: https://conversioncalculator.net/articles/how-to-read-a-tape-measure.html - Understanding Significant Figures and Rounding in Unit Conversion: https://conversioncalculator.net/articles/significant-figures-rounding-conversion.html ## About - About: https://conversioncalculator.net/about.html - Contact: https://conversioncalculator.net/contact.html - Privacy Policy: https://conversioncalculator.net/privacy-policy.html - Cookie Policy: https://conversioncalculator.net/cookie-policy.html