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7/20/2026
Why I Built My Own GPA Calculator (and How I Handled Multi-Scale Grade Math in JavaScript)

Why I Built My Own GPA Calculator (and How I Handled Multi-Scale Grade Math in JavaScript)

Short summary

A developer built GradePoint Pro, a free browser-based GPA calculator supporting 4.0, 4.3, and 5.0 grading scales with target-grade solving. The article covers the vanilla JS tech stack, floating-point rounding challenges, and lessons from building a privacy-focused utility with no backend. It ends with a product pitch for the finished tool.

  • •Built a free, no-signup GPA calculator in vanilla JS supporting multiple grading scales
  • •Covers floating-point precision handling and target-grade solver math
  • •Light technical depth with significant self-promotion of the finished product

Generated with AI, which can make mistakes.

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