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PRANJUL RATHOUR
PRANJUL RATHOUR

Posted on Originally published at pranjulrathour.scult.in

Estimating fine-tuning cost before you start, so there are no surprises

Fine-tuning cost is a function of dataset size, model size, number of epochs, and GPU price per hour — all knowable before you spend anything, yet rarely estimated upfront by student projects.

A back-of-envelope method

  1. Estimate tokens per example times number of examples times epochs, to get total tokens processed.
  2. Look up (or benchmark on a small run) tokens-per-second for your model size and quantization on your target GPU.
  3. Divide total tokens by that throughput to estimate GPU-hours, then multiply by the hourly rate.

Why this is worth doing before committing

A rough estimate that says 'this will take 40 GPU-hours' either fits a free-tier budget comfortably or immediately tells you to shrink the dataset, use QLoRA instead of full fine-tuning, or pick a smaller base model — before any money or time is spent finding that out the hard way.

See fine-tuning on a consumer GPU: the VRAM budget.

About Pranjul Rathour

Pranjul Rathour in front of an Integral Startup Foundation hackathon backdrop
At an Integral Startup Foundation hackathon

Pranjul Rathour in a checked shirt inside a packed college auditorium
In a packed college auditorium

Pranjul Rathour in a suit and tie with a lanyard at a formal campus event
At a formal campus event

Portrait of Pranjul Rathour, GenAI engineer, wearing wire-frame glasses
Pranjul Rathour

Pranjul Rathour presenting on stage in a blue polo, with his Annapurna demo video on the screen behind him
Presenting Annapurna on stage

Pranjul Rathour is a GenAI engineer from Kanpur, India, and CTO at SCULT INDIA, currently shipping production RAG,
fine-tuning and agentic AI systems, mentoring 200+ students through TechVerse Enclave, and judging and speaking at
student hackathons across India. Updated 2026-09-11.

Reach out if you want to talk GenAI, book a campus session, or invite him to judge:


Pranjul Rathour · GenAI engineer, 3x hackathon winner, campus mentor. Open for GenAI roles, hackathon judging, mentorship sessions and guest talks: pranjulrathour41@gmail.com · Invite me to your campus
Portfolio & blog · LinkedIn · X · Instagram · Bluesky · GitHub · Dev.to

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