ncalc/ncalc

Health v2 · maintenance only

Adoption not part of the score

1154 stars · 126 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

NCalc is a fast, lightweight expression evaluator library for .NET that parses and evaluates mathematical and logical expressions at runtime. It supports parameters, built-in and custom functions, lambda compilation, async evaluation, and dependency injection via optional packages.

Use cases

• evaluate user-supplied math formulas at runtime in .NET
• parse and compute logical expressions dynamically
• let users define configurable formulas with parameters
• compile expressions to lambdas for high-performance repeated evaluation
• add custom functions to a runtime expression engine
• evaluate spreadsheet-like expressions in an app

When to choose

• you need a lightweight, fast expression engine on .NET or .NET Framework
• you want extensible evaluation with custom functions and parameters
• you need async evaluation or lambda compilation of expressions

When to avoid

• you need a full scripting language rather than expression evaluation
• your project is not on the .NET platform
• you need symbolic math or computer algebra rather than numeric evaluation

Facets

library · maturity active

parser interpreter math developer-tools programming-languages dotnet cross-platform expression-evaluator runtime-evaluation antlr formula-engine csharp algorithms

Member repositories

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