You guys will love this site
http://www.martindalecenter.com/Calculators.html


AGRICULTURE
(Agribusiness, Soil, Water, Aquaculture, Beekeeping,
Fertilizer, Crops, Vegetables, Livestock)


MATHEMATICS ~ STATISTICS


ARCHAEOLOGY & ANTHROPOLOGY
BIOSCIENCE & BIOTECHNOLOGY
GEOSCIENCE, METALS & ALLOYS
METEOROLOGY & RADIATION


CHEMISTRY
(Lab Experiments & Demonstrations, Chromatography, Crystallography,
Gas Mixtures, Microscopy, Physical Chemistry, Polymer Chemistry,
Quantum Chemistry, Spectroscopy, Thermodynamics, etc.)


PHYSICS, ASTROPHYSICS & ASTRONOMY


ENGINEERING: A-Z


ELECTRICAL ENGINEERING
COMPUTER SYSTEMS ENGINEERING
CYBERINFRASTRUCTURE SYSTEMS
& COMPUTER SCIENCE