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User Accounts & Cross-Device Sync We launched our new account system to support saved preferences and cross-device data sync. You can now register a ZestCalc account with your email. 👉 Sign up at: Account Adult BMI Calculator Track your body metrics with our new BMI Calculator. Unlike standard web calculators, you can save your historical records, sync them across devices, and export your data directly to Excel. 👉 Try it out: Adult BMI Calculator Days Since Calculator Count the days elapsed since your biggest milestones. Track important dates, save the results, and build your own custom collection board. 👉 Check it out: Days Since Calculator

Syncing text snippets across different devices and operating systems is a common daily need. With Live Clipboard, it becomes completely effortless. There is no account registration required—simply create a board and start sharing text in real time. If you choose to protect your board with a password, you get robust end-to-end security: encryption and decryption happen entirely within your browser using Web Crypto. The server never sees or stores your password, making it mathematically impossible for us to read your content. Of course, zero-trust caution is always wise—even though the developer is honest! For maximum peace of mind, you can encrypt your sensitive text beforehand using our Encrypt / Decrypt Text tool before pasting it here. Wait, isn't this website supposed to be a calculator toolkit? Why build a Live Clipboard? Well, first because I found it genuinely useful in my own daily workflow. Second, if you allow a bit of philosophy: every computer program is fundamentally performing calculations. Perhaps the boundary between a calculator and a computer was always meant to be blurry...

For me personally, pairing text with a favorite font greatly enhances the reading experience. Because of this, I couldn't wait to introduce a font-switching feature during the early stages of building this site. By clicking the settings icon, you can choose your preferred font on the preference page; each font supports a specific range of languages. All fonts are sourced from Google Fonts and are automatically downloaded to the website's asset directory during the build phase. Once a user selects a font, the font file is downloaded directly from this site. Preferences are stored locally in the browser, and remote synchronization is not supported at this time.

The pace calculator can help you understand the relationship between distance, time, and pace. Make a simple pace plan before your exercise! Well, why is the first post about the pace calculator? Because the first calculator before the launch of the posts feature is the pace calculator, and we I don't want this place to be empty...