Reference sheets
Printable charts built from the same exact factors as the converters. Print straight from your browser (ads, menus and buttons are left off the page) or download a PDF.
- SI prefixes chartAll 24 SI prefixes from quecto to quetta with symbols, powers of ten and decimal values. Printable and free to download as PDF.
- Engineering conversion cheat sheetOne-page engineering conversion factors: stress, torque, flow, density, viscosity, heat transfer and electrical, with exact NIST/BIPM values.