Teachers juggle lesson prep, grading math, and classroom admin — often on their own dime. These free tools for teachers cover the daily grind: quick calculators, unit converters, text helpers, and forms. No signup, no budget, nothing uploaded.
| Task | Free tool | Why it wins |
|---|---|---|
| Grade math | Percentage Calculator | Instant percent correct, averages, and curves |
| Science units | Unit Converter | Length, weight, volume, temperature |
| Temperature | Celsius to Fahrenheit | Quick °C ↔ °F with the formula shown |
| Age & dates | Age Calculator | Exact ages and day counts for records |
| Class forms | FormEase | Free forms: permission slips, surveys, quizzes |
| Essays | Word Counter | Check word counts on assignments |
| Text formatting | Case Converter | Fix titles and headings fast |
| Handouts | PDF Merger | Combine lesson materials into one file |
Are these teacher tools really free? Yes — unlimited use, no account, no watermark.
Can students use them too? Yes — they're browser-based and work on any device, no login needed.
Is student data uploaded? No — everything runs in your browser, so work stays on your device.
What about paid upgrades? The free tools cover daily teaching use; paid business apps start at $5/mo when needed.