Free digital logic calculators
Type a Boolean expression and get the answer on the page: the truth table, the K-map with its groups, the simplified form with its steps, or the NAND-only and NOR-only versions. No account, nothing to install.
Truth Table Generator
Any Boolean expression, every row.
Open →Karnaugh Map Solver
K-map groups and the minimal SOP.
Open →Boolean Algebra Calculator
Simplify an expression, step by step.
Open →NAND / NOR Converter
Any function from one kind of gate.
Open →One function, four views
Every calculator here works on the same thing: a Boolean function of up to six variables. Type it once and move between them — the truth table lists every row, the Karnaugh map groups the 1s, the algebra calculator shows the laws that simplify it, and the converter rebuilds it from NAND or NOR gates.
They run on the same engine as the LOGICS simulators, so an answer here matches what the Logic Gate Simulator draws. The simulator adds what a calculator cannot: the circuit itself, a canvas to wire gates on, and projects that keep your work.
Looking something up?
The logic gates reference has the symbol and truth table of every gate, and the 74-series chip pages have the pinout of each package.