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Scientific calculator

A plain expression calculator that respects your keyboard — type 25.4*sin(30) and press enter. Trig works in degrees or radians (switchable), and it lives here so shop math stays next to the reference tables and machining calculators it usually accompanies.

enter an expression

enter an expression

Expressions use standard precedence with right-associative powers; trig functions follow the DEG/RAD mode, and ans uses the last committed result.

Derived

Derived from a recursive-descent expression parser with standard arithmetic precedence and trig mode conversion

Values follow the governing standard, which is authoritative for production and inspection decisions. Verify against it before you rely on a number.

Standard names are trademarks of their respective owners; ASdrawn is not affiliated with or endorsed by any standards body.

When do you need a scientific calculator here?

The dedicated calculators here solve specific shop problems, but plenty of quick math falls between them — a trig ratio, a square root, an arithmetic check before you trust a number. This keyboard-first expression calculator handles those in place, so you do not leave the reference page to reach for a separate tool.

Type an expression such as 25.4*sin(30) and press enter; trig functions evaluate in degrees or radians, switchable with one control. It is a plain evaluator, not a graphing or symbolic system — the point is speed next to the tables and machining calculators you were already using.