과학 도구

Calculate microscope total magnification, field of view from FN, and actual specimen size from image measurements — eyepiece × objective. Free, browser-based.

Calculate bolt tightening torque, clamp preload, and nut factor K. Modes: torque from preload (T = KDF), preload from torque, recommended torque from proof load and bolt grade, and nut-factor solver. Metric (mm, kN, N·m) and imperial (in, lbf, lbf·ft) with M6–M24 and Grade 5/8 presets. Free, browser-based.

Get the reverse complement of a DNA or RNA sequence — A↔T/U, G↔C with GC content and FASTA support. Free, instant, browser-based.