Add any calculator to Claude
395 calculator skill files for Claude Code, ChatGPT, and any AI platform that accepts system prompts. Each skill turns your AI into a domain-specific calculator that can gather inputs, run formulas, interpret results, and model scenarios, all through conversation.
What is a calculator skill for Claude?
A calculator skill is a .md file you drop into Claude Code (or paste as a system prompt in ChatGPT, Gemini, or any LLM). It teaches the AI the exact formula, what inputs to ask for, how to validate them, and how to interpret the results in context.
Instead of switching to a calculator app, you describe your situation in plain English. The AI figures out the right inputs, runs the math, shows its work, and tells you what the numbers mean for your specific case. Then you can ask follow-ups and run scenarios without re-entering everything.
How to add a calculator skill to Claude Code
Buy and download the .md file
Purchase any individual skill ($9), category pack ($29), or the full library ($79). Download is instant.
Drop into your .claude/ directory
Place the file in .claude/skills/ in your project or home directory. Claude Code automatically discovers skill files.
Ask Claude to calculate
Just ask naturally: "What would my mortgage payment be on a $400K house?" Claude activates the skill, walks you through it, and interprets the results.
Works with any AI platform
Claude Code
Drop .md file into skills directory
Claude.ai
Add as project knowledge
ChatGPT
Paste as custom instructions
Any LLM
Use as system prompt
Calculator skill packs by industry
Each pack includes every calculator skill in the category. $29 per pack, or $79 for all 395.
Finance Pro Pack
$2952 AI calculator agents
Health & Wellness Pack
$2938 AI calculator agents
Construction Estimator Pack
$2935 AI calculator agents
Math Toolkit Pack
$2930 AI calculator agents
Unit Conversion Pack
$2925 AI calculator agents
Meme Pack
$2925 AI calculator agents
Fitness & Training Pack
$2922 AI calculator agents
Science & Engineering Pack
$2920 AI calculator agents
Business Operations Pack
$2918 AI calculator agents
Culinary Calculator Pack
$2918 AI calculator agents
Automotive Pack
$2916 AI calculator agents
Real Estate Investor Pack
$2915 AI calculator agents
Time & Scheduling Pack
$2915 AI calculator agents
Education & GPA Pack
$2914 AI calculator agents
Energy & Sustainability Pack
$2912 AI calculator agents
Pregnancy & Baby Pack
$2912 AI calculator agents
Tech & Networking Pack
$2910 AI calculator agents
Travel Planning Pack
$2910 AI calculator agents
Pet Care Pack
$298 AI calculator agents
All 395 calculator skills for AI
Every calculator below is available as a free web tool and as a paid AI agent skill file.