MarcusMedina.Units.Energy 0.1.0

MarcusMedina.Units.Energy

Fluent energy unit conversion for .NET 10+ — metric, scientific, and US customary units.

Convert between joules, calories, electronvolts, BTUs and more with a strongly-typed Energy struct — no more guessing which raw double means what.

This one came from a student's chemistry studies — energy units kept coming up in ways I had a hard time following myself. So I did what I always do when I don't understand something: I turned it into code, so I could keep up with my own student.

In this case, I wanted each unit conversion to be broken into the same small, obvious steps, so the formulas would finally make sense to me too, not just to whoever wrote the textbook.

Features

• ✅ Metric — nJ, µJ, mJ, J, kJ, MJ, GJ, TJ, Wh, kWh, MWh, GWh
• ✅ Scientific — eV, keV, MeV, GeV, erg, thermochemical calorie, IT calorie, kilocalorie, ton of TNT
• ✅ US customary — BTU, foot-pound, foot-poundal, therm
• ✅ Strongly typed — Energy struct instead of a raw double, so units can't be mixed up by accident
• ✅ Fluent API — 500.Kilocalories().ToKilojoules()
• ✅ Comparable & arithmetic — +, -, *, /, and full comparison operators
• ✅ Zero dependencies — pure .NET, no external packages

Installation

dotnet add package MarcusMedina.Units.Energy

Requirements: .NET 10.0+, C# 14.0+

Quick Start

using MarcusMedina.Units.Energy.Metric;
using MarcusMedina.Units.Energy.Scientific;

// Create an Energy from any supported unit
Energy meal   = 650.Kilocalories();
Energy photon = 2.5.Electronvolts();

// Convert to whatever unit you need
double kilojoules = meal.ToKilojoules();     // ≈ 2721
double joules     = photon.ToJoules();       // ≈ 4.0e-19

// Arithmetic works directly on Energy values
Energy total = meal + 1.Kilojoules();

// Comparisons
bool bigger = meal > photon;

API Overview

Every unit exposes a creation extension (1.Kilocalories()) and a conversion extension (energy.ToKilocalories()). The Energy struct itself always stores the value in joules, so mixing units in the same expression is always safe.

Testing

cd csharp
dotnet test --configuration Release

Tests: 23 passed — covering all unit families, arithmetic operators, and edge cases.

License

MIT — see LICENSE for details.

Built with Human + AI Collaboration

This library was written by Marcus Medina together with Claude Code (Anthropic) — not through "vibe coding" where you just describe and accept, but through genuine collaboration: planning together, reviewing each other's decisions, pushing back when something felt wrong, and iterating until the result felt right.

The goal was always to write code worth reading and code worth using — the kind a student can open, understand, and learn from, and the kind any programmer can drop into real, professional work without wanting to rewrite it from scratch. AI was a partner in that process, not a shortcut around it.

If you're curious about this way of working, the source code and git history are open. Every decision has a reason behind it.

Made for Curious Minds

This library was built with students in mind — not as a black box to copy and paste, but as a real-world example of how clean, purposeful code is written and shared.

Whether you're discovering C# for the first time, need a reliable helper for your school project, or are simply trying to fall in love with writing code — you're exactly who this was made for.

The source is open. Read it, fork it, break it, improve it. That's the whole point.

And if this library saved you an afternoon, or made something click that didn't before — that's everything.

Non-students are equally welcome. Good code doesn't care about your diploma.

⭐ If this helped you, consider starring the project on GitHub — it helps other students find it too.

💬 Have an idea, a feature request, or just want to say hi? Open an issue on GitHub — I'd love to hear from you.

Package Integrity

All releases are signed with cosign (Sigstore keyless signing).

To verify a downloaded package, download both the .nupkg and its .sigstore.json bundle from the GitHub Release, then run:

cosign verify-blob <package.nupkg> \
  --bundle <package.nupkg.sigstore.json> \
  --certificate-identity-regexp "https://github.com/MarcusMedinaPro/.*/release.yml" \
  --certificate-oidc-issuer https://token.actions.githubusercontent.com

Expected output: Verified OK

Related Projects

• MarcusMedina.Units.Area — Fluent area unit conversion
• MarcusMedina.Units.Volume — Fluent volume unit conversion
• MarcusMedina.Units.Weight — Fluent weight unit conversion
• MarcusMedina.Units.Math — Unit-aware mathematical operations
• MarcusMedina.Maths.Algebra — Algebraic expressions and symbolic math