Calculator
9 tools
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Tools9
RT-AI-019 AI Image Aspect Ratio Calculator
AI image dimensions for any aspect ratio, snapped to multiples of 64
AI Tools
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RT-MAT-001 Basic Calculator
A fast, free online calculator
Mathematics
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RT-AI-008 Embedding Cost Calculator
Price embedding a corpus for RAG: documents × tokens × model rate
AI Tools
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RT-FUN-094 Leave Optimizer (SG / MY / HK)
Turn the fewest leave days into the longest breaks
Career & Work
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RT-AI-002 LLM Cost Calculator
Estimate GPT, Claude & Gemini API costs from token counts and volume
AI Tools
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RT-AI-003 LLM Price Comparison
Compare one request's cost across GPT, Claude, Gemini & Mistral, ranked
AI Tools
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RT-AI-006 Monthly LLM Spend Projector
Forecast monthly & annual API spend from requests per day
AI Tools
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RT-MAT-029 Scientific Calculator
Trig, logs, powers, roots and more
Mathematics
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RT-FUN-087 Your Life in Weeks
See your whole life as a grid of weeks — and download the poster
Fun & Misc
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