Free PC Tools and Calculators

Free PC Tools and Calculators help you plan a build, choose worthwhile upgrades, check performance, and solve common setup questions without installing another program.

Plan a build or upgrade Check performance

Focused tools: 14
Access: No sign-up
Cost: Free to use

Plan what to buy or replace

Start here when you are choosing parts or planning an upgrade.

PC Upgrade Checker

See which upgrade adds the most frames and whether it fits your board, memory, and power supply.

Check your PC

Computer PSU Wattage Calculator

Estimate system power needs and choose suitable wattage headroom for a build.

Calculate wattage

Gaming PC UPS Size Calculator

Get the UPS size and battery time for your graphics card and processor, or check whether the one you own is big enough.

Pro Plan backup for several PCs and print every unit in one report.

Size a UPS

RAM Calculator

Work out how much memory you need, which kit to buy, its true latency, and which slots give you dual channel.

Plan your RAM

Check how the parts work together

Estimate gaming performance, find a likely system limit, and compare your hardware with software requirements.

PC Bottleneck Calculator

See whether the processor or graphics card limits your frame rate, by how much, and which upgrade fixes it.

Check system balance

FPS Calculator for Gaming

Estimate a frame rate range for a desktop or laptop in a selected game, resolution, and upscaling mode.

Pro Compare settings across up to 12 games, and see what an upgrade changes.

Estimate FPS

System Requirements Checker

Compare selected PC parts with the minimum and recommended requirements for a game.

Check requirements

Storage Speed Comparison Tool

Compare common HDD, SATA SSD, and NVMe storage speeds for everyday tasks.

Compare storage

Match airflow, frame rate, and screen setup

Plan case airflow and fan speeds, then check whether your monitor keeps up with the frame rate you want.

PC Cooling Calculator

Check whether your CPU cooler and case fans can carry away your parts' heat at full load, and which one runs out first.

Check your cooling

PC Airflow Calculator

Compare intake and exhaust fan airflow to estimate the pressure balance inside a case.

Plan case airflow

PC Airflow Simulator

Test your own fan layout in a 3D case for free. Pro adds more cases, finer detail, and saved builds.

Model case airflow

PC Fan Curve Calculator

Get the temperature and speed points for CPU, case, AIO, or graphics card fans, with RPM and noise at each one.

Plan a fan curve

Monitor Refresh Rate Calculator

Compare refresh rates, frame times, and expected FPS for a smoother display setup.

Compare refresh rates

Solve a home internet question

Use these focused helpers when the task sits outside PC hardware planning.

Internet Speed Requirements Calculator

Find the download and upload speed a home needs at its busiest, or see what your current plan can handle.

Estimate internet speed

Read the PC before planning the next step

Browser calculators depend on the information you enter. CIB PC Reporter can collect hardware, temperature, drive health, and driver details from Windows, then export a report you can use while checking upgrades and performance.

Get CIB PC Reporter

CIB PC REPORTER Ready

Hardware Detected

Temperatures Available

Export System summary

Computer Info Bits Pro

Turn a result into a report you can hand over

Pro adds a Create report button to 7 of these calculators. Add your notes, business name, and logo, then print the report or save it as a PDF.

The same subscription opens the rest of Pro: PC Airflow Simulator, Multi-PC UPS Planner, FPS Game Planner, Upgrade Route Comparison, Bill Cutter, PC Reporter Pro, ISP Watchdog and RAM Optimizer Pro. It costs US$10 a month or US$70 a year.

See what Pro includes

Reports work in