Not only is fun and fast for lineal length calculations, it also eliminates the tedious work of imperial system. A tool for engineers, technical persons and students for their daily calculations. Special design features: 1. continuous calculating method.(for full version) 2. can modify input data during input process. 3. slide and pick up data actions unlike other ordinary calculators and eliminate input errors. 4. with quick fraction range mover. 5. display various outputs in imperial system and metric system. 6. results can be emailed. 7. with very high accuracy levels, from 1/8" , 1/16", 1/32", 1/64", 1/128", 1/256"