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Calculators & testers that just work

Fast, accurate and free. Calculate, test and check right in your browser — built for gamers, developers and anyone who wants a quick, reliable answer. No ads-first clutter, works great on mobile.

Gaming

eDPI, gacha pity and loot-box odds for the games you play.

Valorant eDPI Calculator eDPI Calculator CS2 eDPI Calculator eDPI Calculator Apex Legends eDPI Calculator eDPI Calculator Fortnite eDPI Calculator eDPI Calculator Overwatch 2 eDPI Calculator eDPI Calculator Rainbow Six Siege eDPI Calculator eDPI Calculator PUBG eDPI Calculator eDPI Calculator Call of Duty / Warzone eDPI Calculator eDPI Calculator Marvel Rivals eDPI Calculator eDPI Calculator eDPI Calculator eDPI Calculator Genshin Impact Pity Calculator Gacha Probability Calculator Honkai: Star Rail Pity Calculator Gacha Probability Calculator Zenless Zone Zero Pity Calculator Gacha Probability Calculator Wuthering Waves Pity Calculator Gacha Probability Calculator Fate/Grand Order Pity Calculator Gacha Probability Calculator Fire Emblem Heroes Pity Calculator Gacha Probability Calculator Arknights Pity Calculator Gacha Probability Calculator Gacha Probability Calculator Gacha Probability Calculator CS2 Case Odds Calculator Loot Box Probability Calculator Overwatch Loot Box Calculator Loot Box Probability Calculator EA FC / FIFA Pack Probability Calculator Loot Box Probability Calculator Pokémon TCG Pack Pull Calculator Loot Box Probability Calculator Clash Royale Chest Calculator Loot Box Probability Calculator Loot Box Probability Calculator Loot Box Probability Calculator

Hardware Testers

Test your mouse, keyboard, controller and monitor right in the browser — no install.

Mouse DPI Checker Mouse DPI Checker Refresh Rate Test Refresh Rate Test Gamepad Tester & Stick-Drift Test Gamepad Tester Dead Pixel Test Dead Pixel Test

AI & Developers

Estimate LLM API costs before you ship.

OpenAI API Pricing Calculator API Pricing Calculator Anthropic Claude API Pricing Calculator API Pricing Calculator Google Gemini API Pricing Calculator API Pricing Calculator

Media & Streaming

Subscription costs and playback-speed watch time.

Streaming Subscription Cost Calculator Streaming Subscription Cost Calculator Streaming vs Cable Cost Calculator Streaming Subscription Cost Calculator Watch Time Calculator Watch Time Calculator

Files & Networking

Transfer times and compression savings.

File Transfer Time Calculator File Transfer Time Calculator Image Compression Savings Calculator Image Compression Savings Calculator

Web & Utilities

Everyday web helpers.

QR Code Size Calculator QR Code Size Calculator