PC MASTERSTUDIO

Free PC building tools and calculators

Plan your PC
before you buy it.

Size the power supply, check for a bottleneck, see whether a language model fits on your graphics card and assemble a machine part by part — free, in your browser, with every formula explained.

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  • 8 free tools
  • No sign-up needed
  • 2026 hardware data
Most used

Assembly simulator

Build a PC piece by piece and check it boots.

Open the simulator

The toolkit

Everything you need to plan a build

Size a power supply, spot a bottleneck, check whether a model fits in VRAM. Every calculator runs in your browser — nothing to install, nothing to sign up for.

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Latest articles

News and analysis

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Hardware

TDP, PPT, PL1 and PL2: what a processor really draws, and the cooler it needs

AMD and Intel print different figures under similar names. The real power ceiling of fourteen processors, why games rarely reach it, and how to size the cooler.

Hardware

Is 8 GB of VRAM enough? The same chip with 8 and 16 GB

Three graphics cards come in 8 and 16 GB versions of the same chip. What the memory alone is worth, the settings that decide it, and when the cheaper card is a trap.

Hardware

80 PLUS Gold or Platinum? What the power supply labels are worth

The efficiency metals save a few euros a year between neighbouring tiers. What 80 PLUS does not certify, and why ATX 3.1 matters more with a modern graphics card.

Example builds

Four complete parts lists.

From a 1080p gaming machine to a workstation for local AI. Open one in the configurator to see every part and its estimated power draw.

Planning a PC with these tools

PC Master Studio is a set of free calculators and guides for the decisions that come before buying parts. Each tool answers one question with the numbers shown, so you can check the reasoning instead of taking a verdict on trust. Used in order, they take a build from an idea to a parts list.

A build, in five questions

  1. What is it for? Gaming at a given resolution, creative work, programming or local AI each put the money in a different part. The configurator has four complete builds, one for each, with the reasoning behind every choice.
  2. Do the processor and graphics card suit each other? The bottleneck detector puts both on one performance scale and shows which one limits the other, so neither is paid for and left idle.
  3. How big a power supply? The power supply calculator adds up the parts, leaves 25 % headroom for spikes and rounds to a size you can buy.
  4. What will it cost to run? The electricity calculator turns that draw and your hours into a monthly and yearly figure at your own tariff.
  5. Will it go together? The building simulator checks sockets, clearances and power cables as you place each part, and the step-by-step build guide covers the real thing.

Running AI models at home

For local language models the questions change: whether a model fits in the graphics card's memory, how fast it will write, and whether buying the card beats renting one. The VRAM calculator, the inference speed estimator and the buy vs rent calculator answer them in that order.

Where the numbers come from

Every tool reads from one hardware catalogue of manufacturer ratings and a relative performance index, and every formula, constant and known limit is written out on the methodology page. The site is run by one person, described on the about page; if a figure looks wrong, the contact page says how to report it.