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GPA Calculator
Weighted & unweighted GPA on 4.0 or 5.0 scales. Add courses, get cumulative GPA instantly.
Weighted
4.0 Scale
AP/Honors
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Final Grade Needed
Find out exactly what score you need on your final exam to reach your desired course grade.
Exam Weight
Grade Scenarios
Reverse Mode
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Interactive Periodic Table
Click any of the 118 elements to see atomic mass, electron configuration, group, period, and more.
118 Elements
Electron Config
Search
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Boolean Truth Table Generator
Type a boolean expression — AND, OR, NOT, XOR, IMPLIES, IFF — and get the full table plus minterm DNF.
Logic
DNF
Tautology Check
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Chemistry Equation Balancer
Type an unbalanced equation like H₂ + O₂ = H₂O and get the smallest integer coefficients (exact rational arithmetic).
Stoichiometry
Atom Check
Parentheses