Average Atomic Mass Calculator
Calculate average atomic mass from isotope masses and percent abundances, then verify that the abundances total 100%.
Sam Gorman
Atomic Mass Calculator
Calculate average atomic mass from isotope masses and percent or decimal-fraction abundances. Check that the mixture totals 100%.
Atom Calculator
Find protons, neutrons, electrons, mass number, atomic number, and ion charge with clear checks for impossible inputs.
Wastewater Calculator
Calculate wastewater load, percent removed, detention time, surface overflow rate, and weir loading in US or metric units.
Protein Molecular Weight Calculator
Paste a protein sequence to calculate theoretical molecular weight in Da, kDa, and g/mol with cleanup reporting and ambiguity handling.
Pet Sitter Rates Calculator
Estimate a pet-sitting booking cost by visit, night, day, or hour, with extra-pet, holiday, recurring, and one-time charges.
MLVSS Calculator
Calculate mixed liquor volatile suspended solids (MLVSS) in mg/L from MLSS and either volatile solids percent or fixed solids.
Tree Value Calculator
Estimate a tree’s appraised value from DBH, ratings, and base price, with step-by-step math and clear method notes.
Tree Spacing Calculator
Calculate tree spacing, trees per acre, total trees, and staggered-row density with a quick canopy crowding check.
Tree Height Calculator
Estimate tree height with angle and distance or shadow comparison, with slope-aware base adjustment and optional uncertainty range.