Free PC Hardware Calculators
Five pure-frontend calculators — no signup, no paywall, no data leaves your browser. Tune before you buy, before you overclock, and before you blame a game for stutter.
GPU FPS Estimator
→Project FPS at 1080P / 2K / 4K across Low / Med / High, with power & temp.
- Resolution pixel scaling
- Preset & ray-tracing load
- Per-tier power draw
No signupInstantPrintable
Power Supply Calculator
→Tally whole-system wattage and get the right PSU size with safe headroom.
- CPU + GPU + peripherals
- OC headroom
- 35% safety buffer
No signupInstantPrintable
VRAM Usage Estimator
→See whether your settings will overflow your card and cause texture streaming.
- Resolution × quality
- Ray-tracing overhead
- HD pack & background apps
No signupInstantPrintable
RAM Requirement Calculator
→Minimum / recommended / ideal RAM for any workload, plus kit suggestions.
- Gaming, editing, dev
- Single-channel penalty
- Browser-tab overhead
No signupInstantPrintable
Monitor Parameter Converter
→Refresh, response time, PPI and VSync/G-Sync/FreeSync range guidance.
- Frame time & input lag
- PPI from resolution
- VRR range check
No signupInstantPrintable
Calculator FAQ
Are these calculators free to use?▾
Yes — every calculator on TweakGearPro is free, requires no account, and runs entirely in your browser. No data is sent to a server.
Can I print or save my results?▾
Yes. Every calculator has a "Print results" button that uses your browser's print dialog, where you can save to PDF. Print styling hides the nav and side panels automatically.
How accurate are the estimates?▾
They model typical real-world scaling, not any single game or card. Treat them as a planning baseline and always cross-check critical decisions against vendor specs and your own benchmarks.
Do the calculators work on mobile?▾
Yes. The layouts stack vertically on phones and all inputs are touch-friendly.