Battery life & power
How long could your battery last? Estimate runtime, annual electricity use and cost from capacity and average power.
Estimate battery lifeFree practical tools
Less guesswork.
Better computer choices.
Three simple calculators to make sense of battery life, screen size, memory and storage. Adjust the assumptions, understand the numbers, then decide what matters to you.
No sign-up · Calculations stay in your browser
Screen size & sharpness
Compare pixel density, physical screen size and viewing distance before you choose a monitor.
Calculate screen sizeRAM & storage for 2026
Turn your software, games and file sizes into a transparent memory and storage plan.
Plan memory & storageUseful estimates, with the working shown.
Each tool explains its inputs and limitations. Battery results depend on measured power, monitor distances are geometric references, and software memory figures are a starting point — none is a performance guarantee.
Already know your requirements? Compare exact laptop configurations or find matches for your budget and software.